Retain top-tier medical doctors, forensic engineers, and financial fraud specialists for deposition, case strategy, and trial testimony without broker commissions.
Search credentialed experts by legal domain, testimony history, jurisdiction, and fee schedule.
Dr. Nourian was an orthopedic spine attending at Ventura Orthopedics (September 2015–February 2021) and has practiced independently since March 2021, across multiple Southern California offices — Moorpark, Thousand Oaks, North Hollywood, West Covina, and Rancho Cucamonga/Montclair — with additional affiliations at US HealthWorks/Concentra and Cedars-Sinai Marina Del Rey Hospital; he was Director of Orthopedic Spine at Simi Valley Hospital (2017–2019). He earned a BA in Economics from UCLA (2000–2005, summa cum laude, 3.94 GPA, Golden Key National Honor Society president) and his MD from the USC Keck School of Medicine (2005–2009, Alpha Omega Alpha, USMLE Step 1 score 243). He completed his orthopedic surgery residency at SUNY Downstate Medical Center, Brooklyn (2009–2014, serving as Chief Resident), and a spine surgery fellowship at the San Diego Center for Spinal Disorders (2014–2015). He is a board-certified orthopedic spine surgeon and holds Qualified Medical Examiner (QME) / Agreed Medical Evaluator (AME) status in California. He is a member of AAOS, the American Board of Orthopedic Surgery, the California Medical Association, the North American Spine Society, and the Ventura County Medical Association. He provides IMEs for personal injury litigation serving both plaintiffs and defendants, with focus on car accident, slip-and-fall, premises liability, and pedestrian injury cases, and is a frequent national and international lecturer who has authored articles and contributed book chapters. His publications include a study of vascular complications in anterior lumbar interbody fusion (Spine, January 2016) and a paper in Clinical Orthopaedics and Related Research (July 2016).
Wolson operates as an independent expert witness and consultant through his firm, Wolson Consulting Group, in New York, NY, distinct from his earlier career as a practicing transactional attorney. He holds the "Esq." credential as a licensed attorney. Prior to consulting, he was an associate at Shearman & Sterling (1974–81), a partner at Williams & Harris LLP (1995–97), counsel at Mayer, Brown & Platt (1999–2001), a partner at Duane Morris LLP (2003–06), and special counsel at Cadwalader, Wickersham & Taft LLP (2006–08), working in structured finance and securitization transactions. He served as an arbitrator with the American Arbitration Association from 2010 to 2025, selected for expertise in structured finance, securities, and derivatives, and formerly chaired the New York City Bar Association's Structured Finance Committee (2004–2008). His recognitions include a "New York Super Lawyer" listing (Law and Politics Magazine), the Albert Nelson Marquis Lifetime Achievement Award (2018), and listings in several Who's Who directories. He has more than 15 years of experience as an expert witness and consultant, having worked with litigation firms including Berger Montague, Chapman and Cutler, Robbins Geller, and Williams & Connolly. Core specialty areas: securities fraud, derivatives (credit default swaps, interest rate swaps, currency swaps), structured finance/securitization (asset-backed securities, mortgage-backed securities, CLOs), legal malpractice, secured lending, and general corporate matters. Publications: co-editor and chief author of "Frequently Used Terms in Securitization and Structured Finance Transactions" (American Bar Association), with additional pieces in The Business Lawyer, Michigan Law Review, and Law360.
Casey K. Hemmatyar, PE, SE, is a structural and civil engineer and founding chair of PSFEG (Pacific Structural and Forensic Engineers Global), based in Los Angeles, CA. He is registered as SE and PE in California (S5108 and C66393) and is licensed in Washington, Hawaii, New York, Nevada, Arizona, Colorado, Alabama, Michigan, Ohio, Texas, and British Columbia. He has over four decades in practice, and the firm's team has designed and investigated tens of thousands of building structures with roughly $50 billion in aggregate construction value. He has served as principal structural engineer on projects for clients including NASA, was Director for SEAOSC (Structural Engineers Association of Southern California) 2011–2013, and has been retained in approximately 200 litigation matters for both plaintiff and defense sides, government agencies, law firms, and insurers. He has developed 36+ AIA-approved continuing-education courses and published studies on wind speeds and building-code amendments.
Founder, President, and Principal Scientist of Anderson Materials Evaluation, Inc. (Columbia, MD, est. 1995). He holds a Sc.B. in Physics from Brown University (1969) and a Ph.D. in Physics from Case Western Reserve University (1978), with an interruption for U.S. Army service in Vietnam. Career: NSF Postdoctoral Fellow and Research Associate, Case Western Reserve (1978–1980, Mössbauer/Auger surface analysis); Research Physicist, Naval Surface Warfare Center, White Oak MD (1980–1990, surface analysis for corrosion, batteries, coatings, energetic materials); Senior Scientist & Head of Surface Analysis Laboratory, Lockheed Martin Laboratories, Baltimore (1990–1995, adhesive bonding, corrosion in electronics, rocket-engine failures, satellite electronics). His focus is surface chemistry/contamination, adhesive bonding failure, thin film/coating characterization, corrosion at surfaces/interfaces, aerospace and biomedical materials, using XPS/ESCA, SEM/EDX, FTIR, and related techniques. His resume lists 19 expert-witness and litigation-investigation matters by subject, among them eyeglass-lens safety-glass analysis, aluminum dump truck weld failures, and a coloration-coatings IP-theft dispute that produced "the largest intellectual property theft damages ever in the State of Connecticut, damages later reduced." His CV lists 30 publications (1979–2021), including conference papers and a book chapter on failure analysis.
Donald L. Hess is President of DLH Associates, Inc. He has provided expert witness services since 1996 and has been involved in over 500 cases in state and federal courts. He has driven nearly 2 million safe cross-country trucking miles, worked more than 25 years as a driver trainer, and has 45+ years of motorcycle riding and training experience. He holds a Class A CDL with all endorsements (doubles-triples, tankers, bus, motorcycle, hazardous materials) and a current USDOT medical certificate. His work covers commercial driver training standards and what drivers are trained to do in given situations, plus CMV crash analysis, vehicle crash analysis more broadly (trucks, tractor-trailers, buses, forklifts, motorcycles), driver behavior, dock and warehouse operations, forklift safety, and loading/unloading procedures. His awards include the American Trucking Associations' Million Mile Driving Award and the Truckload Carriers Association's Lee Crittenden Award (2009). He is a charter member and two-term president of the National Association of Publicly Funded Truck Driving Schools and has held numerous national board positions in trucking and education associations.
Donna S. Jones, RN, is with DSJ & Associates, a medical-legal nurse consulting firm based in Brunswick, Georgia. She holds an ASN from Fairmont State College (West Virginia) and a Bachelor of Arts in Communication from Georgia State University. She has over 40 years of experience in critical care, respiratory ICU, cardiac care, medical-surgical nursing, emergency department, and home health care, and remains clinically active. She has been at Eastside Medical Center in Snellville, Georgia since 2007, and previously worked at Piedmont Hospital and at Northlake Medical Center in Tucker, Georgia (1997–2006). Earlier in her career she was a research nurse with Emory University's Department of Medicine/Infectious Diseases in Atlanta (1975–1979). She also spent a year in clinical practice in Australia, worked as a nurse manager, and served as editor of the Hospital Peer Review Newsletter. Her practice covers nursing negligence, malpractice, personal injury, wrongful death, medication errors, pressure ulcers, falls, sepsis, and critical-care standards.
Diana G. Lesgart, CPA, practices as Diana G. Lesgart, An Accountancy Corporation, in Woodland Hills, CA (6320 Canoga Avenue, Suite 1500, Woodland Hills, CA 91367). Her focus is family-law forensic accounting and litigation support: tracing of separate and community-property assets, pension-plan tracing, business valuation and apportionment, cash-available-for-support analysis, Moore-Marsden/Branco calculations, fraud investigation, real-estate analysis, community-property balance sheets, trust accounting, and general forensic accounting, commercial litigation, and trusts-and-estates work.
Joseph S. Barbagallo, CPA, CVA, CFF, CFD, CFS, CFE, CFI, ABV, FCPA, CGMA, MAFF, is a shareholder of Barbagallo & Associates, P.C., with offices at 85 South Main Street, Yardley, PA, and 100 N. 18th Street, Suite 300, Philadelphia, PA. He earned a B.S. in Commerce (accounting major) from Rider University in 1973 and took graduate taxation coursework at Temple University. He is a CPA licensed in both Pennsylvania (CA-012179-R) and New Jersey (CC-00737800). He has testified as a qualified expert in federal, commonwealth, and state courts across Pennsylvania, New Jersey, Maryland, and New York (2008–present), with a practice concentration in fraud investigation and deterrence, corporate and shareholder litigation, governmental corruption matters, damage calculations, and marital dissolution. He served as a United States Marine and received two medals for Bravery in Combat, including the Bronze Star.
✓
Joseph B. Michels is Executive Managing Director of Solomon Bruce Consulting LLC, an international engineering and management consulting firm headquartered in Fort Worth, Texas, with additional offices in Salt Lake City and Atlanta, practicing in supply chain management, logistics, business operations, and government procurement. He was a principal of the firm from 2008 until its board named him Executive Managing Director in January 2025. He serves as an expert witness in transportation, trucking, trailer loading and unloading, warehousing, inventory control, logistics, supply chain management, distribution, packaging, forklift operations, OSHA compliance, procurement, and overall business operations, and has more than 49 years of senior management experience in supply chain management and logistics. He is a retired U.S. Air Force Colonel (1971 to 2002) who held vice-presidential-level responsibility for air, sea, and surface transportation, strategic sourcing, purchasing, and requirements planning, and managed budgets exceeding $4 billion. His Air Force service included senior leadership of an F-16 maintenance group, program management of computer systems at the Defense Logistics Agency, logistics work in the Office of the Chief of Staff of the Air Force, and a city-manager role running all base operations and maintenance at a remote arctic base in northern Greenland. He also served as Dean of the School of Systems and Logistics at the Air Force Institute of Technology and, from 2002 to 2005, as Dean of the AACSB-accredited College of Business at Montana State University Billings, where the college launched an online B.S. in Business Administration. He holds a B.S. in Electronic Engineering Technology from Weber State University, an M.S. in Systems Management from the University of Southern California, a Ph.D. in Industrial Engineering from Texas A&M University, an M.P.A. from the University of Oklahoma, and an M.A. from the Naval War College. He is a licensed Professional Engineer in Texas and Montana, a Certified Professional Logistician through SOLE (the International Society of Logistics), a Fellow of the Institute of Industrial and Systems Engineers, and DAWIA Level 3 certified in Acquisition Logistics. Location: Fort Worth, TX.
John G. Minor is President of Complete General Contractors, Inc. (Team Complete), headquartered in Pensacola, FL with an additional office in Miami. His credentials include Certified General Contractor (CGC), Certified Floodplain Manager (CFM), a Community Association Manager (CAM) license, Mold-Related Services Assessor and Remediator (MRSA/MRSR), Water Restoration Technician (WRT, IICRC), FAA Part 107 Remote Pilot certification, FLIR-trained thermographer, and a Louisiana insurance appraiser/umpire credential. Contractor licenses: Florida #CGC061674 (Class A Unlimited), North Carolina #42065 (Unlimited), and South Carolina General Contractor - Building #G113511, plus a Florida Engineering Certificate of Authority (#33037). He has 25+ years in construction, insurance appraisal, and expert-witness work. His father has been a licensed plumbing contractor in Gulf Breeze, FL since 1971, and he brings a lifelong coastal-Florida grounding in hurricane damage. He teaches restoration, appraisal, and construction-defect courses for Lorman Education Services, the National Hurricane Conference, and other professional organizations, and has volunteered for over a decade with the Florida Coastal Monitoring Program (FCMP) at the University of Florida, a FEMA-linked hurricane research effort. His case and engagement history includes trial testimony distinguishing wind versus flood damage after Hurricane Ivan; cause-and-cost analysis for State Farm after Hurricane Katrina; testimony in a case concerning Louisiana's New Home Buyers Warranty Act following Hurricane Gustav, which was initially won in local court, overturned on the next court's interpretation, and eventually upheld by the Louisiana Supreme Court; a 2013 hail-damage claim covering 51 Amarillo Independent School District schools; and post-Hurricane Michael damage assessment in Lynn Haven, FL. He belongs to ASCE, ASTM International, the Property & Liability Resource Bureau (PLRB), the Association of State Floodplain Managers (ASFPM), and ICC.
Julie M. Plat, CPA, CFE, manages the forensic accounting department at Kelly + Partners in downtown Los Angeles, CA, after more than a decade as a senior consultant at Freeman & Mills and a stint as manager in the litigation consulting group at Coopers & Lybrand. Her office is at 515 S. Flower St., 19th Floor. She has more than 20 years in forensic accounting. Her work covers economic-damages calculation, financial-fraud investigation (fund tracing, financial-record interpretation, internal-control assessment, witness interviews), and expert testimony at deposition and trial, including court appointments. Case types include loss of income, partnership disputes, shareholder suits, business-interruption claims, embezzlement, breach of contract/fiduciary duty, accounting malpractice, lender liability, earn-out and lease disputes, across financial services, insurance, entertainment, retail, manufacturing, healthcare, professional services, construction, and real estate.
James Rappoport (AIA, NCARB) is Vice President and Architect of Record at Daroff Design Inc. + DDI Architects, PC, a Philadelphia planning/architecture/interior-design firm founded in 1973 (2121 Market Street, Philadelphia, PA 19103). Education: Bachelor of Architecture, Cornell University (1964); Master's in Architecture & Urban Design, Columbia University (1966); post-graduate studies in Urban Economics, New York University (1967–1969). He was first licensed to practice architecture in New York State in 1969 and is currently licensed in 33 U.S. jurisdictions, including Pennsylvania, New York, California, Texas, and Florida. He has over 50 years of experience in urban planning, architecture, and interior design, and has provided expert-witness consultation, reports, opinions, affidavits, certificates of merit, depositions, mediation and alternative dispute resolution presentations, testimony, and pre-trial support in more than 400 legal cases across 33 states, engaged by both plaintiff and defense teams; every one of those matters settled before trial. He is the author of several professional textbooks and trade-journal articles and has been awarded multiple copyrights. He is a member of the American Institute of Architects, the U.S. Green Building Council, the International Code Council, and the Construction Specifications Institute, and is NCARB-certified. His areas of expertise include architecture and interior design, architectural codes and standards, the architect's standard of care, ADA compliance, building codes and ordinances, construction disputes, furniture/fixtures/equipment, professional liability, premises liability, and urban development/planning. An attorney testimonial on his site describes his expert report as "excellent and one of the most comprehensive I have received."
John Ross works as a Commercial Trucking Expert with Evidence Solutions, Inc. He has over 30 years in the trucking industry, with professional commercial vehicle driving beginning in 1993 and a flawless, violation-free driving record. His prior roles include owner/operator, safety director, and compliance director. He has driven over 1.2 million total safe miles, including roughly 75,000 bobtail miles, 550,000 tanker/belly-dump miles, 500,000 A-train hazmat miles, and 100,000 flatbed/oversized-load miles, with no violations or out-of-service citations. Certifications include a Wyoming CDL with Texas endorsements, hazmat training, H2S and SCBA training, OSHA 10 and OSHA 30, and National Safety Council Defensive Driving Instructor certification (2020). His expert focus is FMCSA and CDL licensure requirements, truck driver training and skill testing, and driver standard of care, alongside accident investigation involving load securement, hazmat handling, and vehicle maintenance. He has given more than 50 depositions and testified at five trials, with roughly 80% of his engagements on the plaintiff side and 20% defense.
Michael A. Pollock is a Principal Engineer with Cogent Experts, LLC in Bryn Mawr, Pennsylvania. He earned a BS in Mechanical Engineering, cum laude, from Drexel University (1998), completing Drexel's "E4" enhanced engineering-education program with coursework spanning mechanical systems, thermodynamics, HVACR, history and psychology. He is a licensed PE in Pennsylvania (PE075410), a Certified Energy Manager (2011, Association of Energy Engineers), holds a Universal EPA Clean Air Act certification (chillers/HVAC/refrigeration), and is a registered practitioner before the U.S. Patent & Trademark Office. He is a member of the American Arbitration Association, the American Bar Association's Construction Forum, ASME, ASHRAE, and the Product Developers and Manufacturers Association. He previously worked as Technology & Engineering Manager at DuPont in Delaware, with decades across utilities, energy, pulp/paper, and chemical/petrochemical industries. His practice covers construction defect and standard of care, with named matters including a $10 million warehouse-facility construction-defect evaluation (Maryland), a $28 million psychiatric-hospital construction claim (North Carolina), a $3 million municipal-building delay claim (northern New Jersey), a 2021 Electrical Distribution System Construction Defect Matter (standard of care), and multiple residential/commercial construction-defect reviews in Pennsylvania. He has also researched and mitigated several electrical substation failures (500 KVA to 38 MVA), including fires and explosions, at research and development laboratory buildings in Delaware. Software proficiencies include Navisworks 3D, SmartPlant 3D, PDMS, AutoCAD, Rhino CAD and CAD/CAM.
Mason A. Dinehart III is a San Ramon, California-based securities expert witness who has worked through his firm FEND (Financial Education Network Development) and brings four decades of securities-industry experience. He is the designated securities expert witness for the California State Bar. His areas of practice include churning analysis, broker fiduciary duty, IPO evaluation, due diligence, suitability analysis, and private placement offerings. He also holds professional affiliations with IARFC, the FINRA Board of Arbitrators, the American Association of Individual Investors (AAII), and the North American Securities Administrators Association (NASAA), and uses Thomson Reuters' "Investment View" damage-calculation tool in case work.
Michael R. Koeppel, CPA, CITP, CTP, CFF, CGMA, ABV, is Founder and Managing Director of Lakelet Advisory Group LLC, founded in 2003 and headquartered at 1902 Ridge Road, Suite 146, West Seneca, NY, with additional offices in Toronto, ON and Rochester, NY. He holds a B.A. in Economics (summa cum laude) from the State University College of New York at Buffalo and a Master of Accountancy from Bowling Green State University; he has taught corporate taxation and econometrics at SUNY Buffalo and served as a PricewaterhouseCoopers technology-optimization instructor in the U.S. and Brazil. His career includes data security audit work at PricewaterhouseCoopers in the U.S. and Brazil, designing a legal software platform adopted by 500+ law firms in its first year, a senior technology executive role at a Fortune 500 company, interim COO and CFO engagements at international companies, Citigroup Venture Capital experience, service as a U.S. Army Medical Corpsman (E-5), and work across 34 countries. He has led 19 M&A transactions and practices in business valuation, financial forensics, bankruptcy restructuring, turnarounds, estate and gift planning, intellectual property valuation, ESOP valuations, economic loss analysis, and service-organization controls. He chaired the NY State Society of CPAs Business Valuation and Litigation Support Committee (2024–2026) and previously chaired its Bankruptcy and Financial Reorganizations Committee (2012–2018); he is a member of the Academy of Court-Appointed Neutrals. He authored "Methodologies and Challenges in Bankruptcy Valuation" and "A Complete Guide to Business Valuations for Estate & Gifts" (both 2025), and was featured in the American Bar Association's Judges' Journal. Memberships: AICPA (1983–present), NY State Society of CPAs (1987–present), Turnaround Management Association (2005–present), American Society of Appraisers (2021–present), Association of Certified Fraud Examiners (2013–present), International City/County Management Association (2013–present).
Hastak holds a Ph.D. in Civil Engineering from Purdue (1994), an MS in Civil Engineering from the University of Cincinnati (1991), a BE in Civil Engineering from Nagpur University, India (1987), and an MS in Law (MSL) from Northwestern University's Pritzker School of Law, earned in 2024. He is a licensed Professional Engineer in Indiana, a Certified Cost Professional (CCP, AACE International, since 1996), a Construction Risk Insurance Specialist (CRIS, 2019), a Fellow of ASCE (elected 2024), and a member of the National Academy of Construction (elected 2023). He is the Reilly Professor at Purdue's Lyles School of Civil and Construction Engineering, and served as Dernlan Family Head of Construction Engineering and Management from 2007 to 2024. Effective July 1, 2024, his Division of Construction Engineering and Management merged into the existing Lyles School of Civil Engineering, which was then renamed the Lyles School of Civil and Construction Engineering. His work spans process improvement, disaster risk reduction, infrastructure management, cost control, and project management. He is an author of an infrastructure-management text published by McGraw-Hill (editions in 2006 and 2015). He was President of the International Council for Research and Innovation in Building and Construction (CIB) from 2022 to 2025, and Editor-in-Chief of the ASCE Journal of Management in Engineering from 2009 to 2016. Since 1992 he has served on eight Construction Industry Institute research teams and various committees, and he served on AACE's Education Board (2004–2016).
Nagata holds a B.A. in Economics from the University of Pennsylvania, the PSP (Planning & Scheduling Professional) credential, and is a Certified Construction Documents Technologist through the Construction Specifications Institute. He is a Director at Trauner Consulting Services, Inc. (Philadelphia, PA). His work covers schedule delay analyses, inefficiency analyses, and the calculation of damages, using critical path method (CPM) scheduling. He has qualified as an expert witness and testified on delay, cost, damages, and wrongful-termination issues, with litigation support work including expert reports, written testimony, interrogatory responses, and deposition preparation. Publications: co-author of "Construction Delays, Third Edition"; co-author of a chapter on alternate-project-delivery claims in "Construction Contract Claims, Changes, and Dispute Resolution"; and a contributing author to AACE International's Recommended Practice No. 29R-03 for Forensic Schedule Analysis, specifically on "Contemporaneous Period Analysis and Contemporaneous Schedule Analysis." He also writes technical articles for industry publications. He is a certified Federal Highway Administration instructor and has presented more than 100 seminars, webinars, and construction claims-related presentations, nationally and internationally. His project experience spans bridge, highway, transit, healthcare, high-rise, and energy projects ranging from small jobs to multi-billion-dollar scale.
Michael P. Schuller, P.E., FTMS, FAPT, is President of Atkinson-Noland & Associates (ANA), a masonry-engineering firm based in Lafayette, CO, with an office in New York City. He is licensed as a Professional Engineer in Colorado (1994, License No. 29544), New York (2013, No. 93125-1), and New Jersey (2017, No. GE 5339100). He holds a B.S. in Civil Engineering (1987) and M.S. in Civil Engineering (1989), both from the University of Colorado. He is credited with "more than 100 publications relating to evaluation, repair, and structural behavior of concrete and masonry structures" and is co-author of "Assessment and Retrofit of Masonry Structures" and "Nondestructive Evaluation and Testing of Masonry Structures". He taught Masonry Structural Design at the University of Colorado, Boulder (2000–2009 and again in 2016) and is a Fellow of The Masonry Society and the Association for Preservation Technology, sitting on the Board of Directors of the Rocky Mountain Masonry Institute. Past clients cited include the Nuclear Regulatory Commission, the U.S. Army Corps of Engineers, the Getty Institute, the National Park Service, and the World Monuments Fund.
Martin H. Williams, Ph.D., is a clinical and forensic psychologist practicing in California, with offices in San Jose, San Francisco, Los Angeles, Glendale, Newport Beach, and San Diego. Education: B.A. summa cum laude, UCLA (Psychology, June 1968, Phi Beta Kappa, Highest Honors, Woodrow Wilson Fellow 1968–1969); Ph.D., University of California, Berkeley (Psychology, June 1975; dissertation on behavioral treatment of fear of flying). He was a National Science Foundation predoctoral fellow and completed predoctoral internships at VA hospitals in Palo Alto and San Francisco (1970–1973). He was a Clinical Psychologist in the Department of Psychiatry at Kaiser-Permanente Medical Center, Santa Clara, CA, from 1980 to 2007, becoming Division Chief of Adult Psychiatry there in 1995 and Director of the Group Psychotherapy Program in 2003; he chaired the department's Peer Review Committee for ten years (1983–1987 and 1988–1995). He has been a licensed psychologist in California since 1976 (License PSY 4642). He served on APA Division 42, chairing an Interdivisional Task Force on Licensing Board Problems and Issues (2004–2006) and serving on the Division 42 Task Force on Specialty Guidelines for Forensic Psychology (2005–2007). His publication record spans 1969–2005, including "Exploitation and Inference: Mapping the Damage From Therapist-Patient Sexual Involvement," American Psychologist, 47(3), 412-421 (1992), and a book chapter, "Multiple Relationships: A Malpractice Plaintiff's Litigation Strategy," in Dual Relationships and Psychotherapy (Springer, 2002).
Park Dietz, MD, MPH, PhD, is a forensic psychiatrist based in Irvine, CA. He holds an M.D., Ph.D., and M.P.H. from Johns Hopkins University. He did his general psychiatry residency at Johns Hopkins and a forensic psychiatry fellowship at the University of Pennsylvania. Early in his career he was Assistant Professor of Psychiatry at Harvard Medical School, and then Professor at the University of Virginia, holding joint appointments at UVA's School of Law and School of Medicine. He is currently Clinical Professor of Psychiatry and Biobehavioral Sciences at the UCLA David Geffen School of Medicine, and consults as a forensic psychiatrist to the FBI's Behavioral Analysis Unit and the New York State Police Forensic Sciences Unit. Dietz founded Threat Assessment Group, Inc. in 1987 (workplace-violence prevention consulting) and Park Dietz & Associates, Inc. He is a past president of the American Academy of Psychiatry and the Law and has authored more than 100 publications. He has testified in high-profile criminal cases, including the trials of John Hinckley Jr. (1982, for the prosecution), Jeffrey Dahmer, and Andrea Yates (2002 — her conviction was later overturned because of an error in Dietz's testimony), and has consulted in matters involving Ted Kaczynski and Jared Lee Loughner. He received the American Academy of Psychiatry and the Law's Seymour Pollack Award in 2010 and was named among Security magazine's "Top 25 Most Influential People in the Security Industry" (2009).
Roman Garagulagian, Ph.D., is principal economist of Forensic Economic Services LLC in Los Angeles, California (1150 S. Olive Street, Floor 10, Los Angeles, CA 90015; Rule703.com). He holds a B.S. in Economics (December 2009) and an M.S. in Economics (June 2012), both from California State Polytechnic University, Pomona, and a Ph.D. in Economics from Claremont Graduate University (May 2016). His doctoral research applied advanced machine learning methods to economics, a topic he presented at the Western Economic Association International's 92nd annual conference in 2017. He has been an adjunct professor of finance at Cal Poly Pomona since September 2014, teaching undergraduate and graduate courses in corporate finance, business forecasting, and financial modeling. He was a teaching assistant in advanced microeconometrics at Claremont Graduate University (2014–2015, under instructor Yariv Fadlon) and an associate economist at Rizzardi Economic Associates (January–December 2016, working on wrongful termination, employment discrimination, wage-and-hour, class-action, personal injury, and wrongful death matters), and has run Forensic Economic Services since January 2017. His publications include: Garagulagian, Rosenbaum, and Schap, "A 2021 Survey of Forensic Experts: Their Methods, Estimates, and Perspectives," Journal of Legal Economics 28, no. 2 (2022): 3–27; and Nelson, von Hippel, Peterson, and Garagulagian, "The Great Recession or progressive energy policies? Explaining the decline in US greenhouse gas emissions forecasts," Journal of Environmental Planning and Management 59, no. 3 (2016): 480–500. He has presented at multiple Western Economic Association International, American Economic Association, Southern Economic Association, and American Academy of Economic and Financial Experts conferences between 2017 and 2023 on topics including unemployment duration in wrongful termination cases, credit-damage mitigation, economic-hardship analysis for immigration (I-601A) matters, and blockage discounts for thinly traded stock-based compensation. He presented "The Gray Areas in Economic Effects of COVID-19" at the American Rehabilitation Economics Association in May 2022. He is a referee for the Journal of Forensic Economics, a member of the American Economic Association, Vice President West on the board of the National Association of Forensic Economics, a board member of the American Academy of Economic and Financial Experts, and a member of the National Association for Business Economics' Los Angeles chapter. His practice centers on quantifying lost earnings and lost profits arising from death, injury, or wrongful conduct, plus antitrust, business valuation, business interruption, elder financial abuse, fraud investigation, and securities-related economic damages. His firm reports 85 depositions given and 24 trials testified.
Rosemary Coates, MBA, is President of Blue Silk Consulting, based in Los Gatos, California, and also serves as Executive Director of the Reshoring Institute, a 501(c)(3) nonprofit. She holds an MBA from the University of San Diego and a B.S. from Arizona State University. Her earlier career includes Senior Director at SAP, Supply Chain Practice Leader at Answerthink Consulting Group and at KPMG Peat Marwick, and Regional Manager at Hewlett-Packard. She has authored five supply chain books, including the Amazon bestseller "42 Rules for Sourcing and Manufacturing in China," "Negotiation Blueprinting for Buyers," "42 Rules for Superior Field Service," "The Reshoring Guidebook," and "Legal Blacksmith: How to Avoid and Defend Supply Chain Disputes." She received the Silicon Valley Women of Influence award for 2024 and hosts the podcast "The Frictionless Supply Chain." She has appeared as a guest on the FreightWaves show "Rethink Reshoring," which is hosted by Kaylee Nix. In Fluence Energy v. M/V BBC Finland, an admiralty matter in the U.S. District Court for the Southern District of California, she was retained by the defendants and submitted an expert report in 2023. Location: Los Gatos, CA. Address: P.O. Box 760, Los Gatos, CA 95031.
Ronald K. Tyson of Tyson Enterprises, Inc., Ortonville, Michigan, has been a Michigan-licensed builder since 1967. Since 1972 he has worked for both plaintiff and defendant attorneys in all types of litigation, providing forensic building and site-dispute inspections and independent opinions. His professional-association memberships include ICC (formerly BOCA, ICBO and SBCCI), MIAM, NFPA, IAEI, and ASTM. His practice covers allegations of faulty construction, and he specifically flags building and fire code compliance, life-safety standards, and ADA and MIOSHA compliance as focus areas.
Sanjay G. Adhia, MD, is a forensic psychiatrist practicing as Adhia & Associates, Forensic Psychiatry, in Sugar Land, TX, with a second office in Houston. He earned his M.D. from M.S. Ramaiah Medical College (2004). He is triple board-certified by the American Board of Psychiatry and Neurology — in General Psychiatry, Forensic Psychiatry, and Brain Injury Medicine — and holds Medical Review Officer certification (since 2020) and a Florida Medical Doctor Expert Witness Certificate (#MEEW10358, 2023–2025). He is licensed in Texas (Board of Medical Examiners license Q0720). He serves on the Texas Governor's Advisory Committee to the Texas Board of Criminal Justice on Offenders with Medical or Mental Impairments (a Texas Senate-confirmed appointment, since 2019), and volunteers with Physicians for Human Rights' Asylum Network, conducting forensic evaluations of survivors of human trafficking. His forensic specialty covers psychiatric damages assessment, brain injury evaluation, criminal competency, testamentary capacity, undue influence, medical malpractice, toxic torts, and capital-case mitigation. He has done expert-witness work since 2014. His publications include a 2026 article on "Traumatic brain injury and violence in adults" plus writing on counterterrorism policy, human trafficking, and forensic neuroimaging.
Stephen P. Warhoe holds a B.S. in Civil Engineering, University of Colorado Denver (1986); an M.B.A., Colorado State University, Denver (1993); and a Ph.D. in Strategy, Project & Program Management from Skema Business School, Paris (2012). He is a Registered Professional Engineer in Colorado (No. 29909), a Certified Cost Professional (AACE International, No. 01430), and a Certified Forensic Claims Consultant (AACE International, No. 12). He is Vice President at Long International, with over 40 years of experience in project controls, risk management, project management, construction management, and dispute resolution, including having managed design and construction projects valued at more than $4 billion. His focus areas are schedule delay analysis, productivity-loss analysis (including system dynamics modeling), cost/damages assessment on construction disputes exceeding $6 billion, including individual disputes over US$3 billion, project controls/risk management, and claims avoidance. Leadership: President of AACE International (2008–2009); Vice President-Technical of AACE International (2020–2024); Honorary Life Member of AACE International (2019); recipient of the AACE Lifetime Achievement Award (2025). He is credited as primary or co-author of three AACE International Recommended Practices covering change management, entitlement documentation, and cumulative-impact claims. His recent blog posts cover delay-analysis methodology, productivity-loss disputes, and AI in construction claims, including "Selecting and Explaining Defensible Delay Analysis Methodologies."
Sanford (Sandy) C. Loy leads Construction Strategies and Construction Plus Inc. (CPI), both based in Knoxville, TN. He holds a Bachelor of Architecture with Honors (1976) and a Master of Science in Civil Engineering (1982), both from the University of Tennessee, Knoxville, and is a Certified Construction Manager (CCM #1432) and unlimited Tennessee General Contractor (#27768, reciprocated in most states). His career since 1976 has included: Director of Engineering Services at the Tennessee Valley Authority (1976–1984); Regional Engineer at the American Institute of Steel Construction (1984–1985); Project Manager at Christman Construction in Memphis (1985–1986); Director of New Construction and Development at Belz Enterprises in Memphis (1986–1988); founder/president of Construction Plus Inc. since 1988; and founder/president of Construction Strategies. His litigation practice covers construction disputes, contract conflicts, code-violation claims, performance-bond claims, construction-defect cases, and design-build delivery, for both plaintiffs and defendants. He has authored newspaper pieces — an article on school construction costs in the Knoxville Focus, and "Mold: the Insidious Invader" in the Knoxville News Sentinel. Business awards include a 2010 National Blue Ribbon Award (U.S. Chamber of Commerce), a 2005 Pinnacle Award for Business Excellence, a 1998 EXCEL Award (one of the 25 fastest-growing East Tennessee companies), and a 1996 Enterpriser Award (Knoxville Area Chamber Partnership). He belongs to the Construction Management Association of America, ASCE, and AIA.
Simon N. Ferber, PsyD, QME, is a licensed clinical psychologist in California and the founder of Ferber Psychology (founded 2018), practicing across multiple Southern California locations from an office in Encino. He holds a Doctor of Psychology (Psy.D.) in Clinical Psychology from the California School of Professional Psychology / Alliant International University and a Master of Arts in Clinical Psychology from California State University, Northridge. He also holds a Certificate in Applied Forensic Psychology from The Chicago School and a Certificate in Neuropsychological Assessment from UC Berkeley Extension, and is a Qualified Medical Evaluator (QME) with the California Division of Workers' Compensation and a POST-compliant peace officer psychological evaluator (California Commission on Peace Officer Standards and Training). His clinical and forensic focus includes trauma and stress-related conditions and first-responder psychology. He has treated survivors of mass-casualty events, including the YouTube headquarters shooting, the VTA Santa Clara shooting, the Las Vegas Route 91 Harvest shooting, the Gilroy Garlic Festival shooting, and the Camp Fire, Tubbs Fire, and Oakland Ghost Ship warehouse fire, as well as law-enforcement critical incidents such as officer-involved shootings. His practice covers employment-related assessments and trauma-focused treatment for first responders and injured workers, using EMDR and trauma-focused CBT in treatment and performing pre-employment, fitness-for-duty, CCW-permit, and qualified and agreed medical evaluations. His expert-witness work covers personal injury, emotional distress, pain and suffering, and causation. Location: Los Angeles, CA.
Stan V. Smith is a Chicago-based forensic economist and the chairman of Smith Economics Group, Ltd. He holds a B.S. in Operations Research from Cornell University (1968), a master's degree with a concentration in economics from the University of Chicago Graduate School of Business (1972), and a Ph.D. in Economics from the University of Chicago (1997), with his doctoral thesis titled "Jury Verdicts in Drunken Driving Cases" and support fields in finance and econometrics. Smith developed the underlying methodology for valuing the loss of enjoyment of life as distinct from lost earnings or human-capital value. The 1985 Illinois case Sherrod v. Berry, involving a police shooting of an unarmed man, addressed that valuation approach. He co-authored Economic/Hedonic Damages: A Practice Book with Michael Brookshire (1990), along with subsequent supplements. Before turning to forensic economics full time, Smith worked as a staff economist at the Federal Reserve Board of Governors (1973–74) and at a Chicago bank, was an associate economic analyst at an investment-banking consultancy (1974–77), founded an underwater-artifact recovery company (Seaquest International, 1977–81), and served as a principal/managing director at Ibbotson Associates (1981–85), where he originated the Stocks, Bonds, Bills, and Inflation (SBBI) data series later published by Ibbotson/Morningstar/Duff & Phelps. From 1970–73 he was a research assistant to Nobel laureate economist Eugene Fama at the University of Chicago. He taught as an adjunct professor at DePaul University (1990–1994), where he created the nation's first forensic-economics course ("Advanced Remedies"), and has lectured at the University of Chicago. Smith has been a member of the American Economic Association and American Finance Association since 1985, served on the Board of Editors of the Journal of Forensic Economics from 1990 and as a term vice president of the National Association of Forensic Economics (2000–2003), and has been a NAFE member since 1988. He has authored more than 60 articles and book chapters on hedonic damages, loss of enjoyment of life, household-services valuation, credit damages, and jury-verdict analysis, appearing in outlets such as the Journal of Forensic Economics, the Journal of Legal Economics, the ABA Journal, and various state bar publications. He has appeared on CNN's Larry King Live (1989) and as a Fox News (WFLD) contributor (2008–2009), and has been profiled in the Wall Street Journal and National Law Journal. Smith has been retained several thousand times over a 20-plus-year consulting career. Past client relationships include Chicago firms such as Kirkland & Ellis, Jenner & Block, Schiff Hardin, and Wildman Harrold.
Scott L. Turner is Chief Consultant of Truck Accident & Incident Experts, LLC, operating nationally and through Canada via regional offices. He has nearly 40 years of CMV operations and crash-investigation experience. He spent several years in the late 1980s as an owner-operator of a tractor-trailer performing over-the-road driving, covering an estimated 250,000 miles as an 18-wheeler CMV operator running low-boys, dry-van trailers, and cargo tankers. As an 11-year instructor he taught CMV crash and hazmat-incident response for the New Jersey State Police, and he trained NYPD, FDNY, the Philadelphia Fire Department, and California's CRHMRO. He has investigated well in excess of 1,000 CMV tractor-trailer crashes and handled roughly 200 cargo-tank truck crashes. His certifications include Level 1 FMCSA/MCSAP roadside inspection, Truck Foundation Air-Brake Failure certification, FMCSA-MCSAP motorcoach inspections, and FMCSA-PHMSA hazardous-materials inspections.
Tim Ketchum, M.S., ABV, CVA, is Managing Partner and a valuation expert at Ketchum Business Valuation in Rochester, Minnesota. He holds a Bachelor of Science in Economics from Northern Michigan University and a Master of Science in Applied Economics from West Virginia University. He is Accredited in Business Valuation (ABV) through the AICPA and a Certified Valuation Analyst (CVA) through NACVA, and was elected to NACVA's Ethics Oversight Board. He has experience across more than 30 industries and 200+ engagements, has completed over a dozen led M&A transactions with enterprise values from $5 million to $85 million, and has more than a decade of military service. He is an Adjunct Professor at West Virginia University. Practice areas include business valuation, economic damages, lost profits, shareholder disputes, marital dissolution, personal injury/wrongful death claims, franchise and real estate valuation, and construction damages.
Thomas M. Neches, CPA, ABV, CVA, CFE, CFF, is the managing partner of Thomas Neches & Company LLP, based in Colorado Springs, Colorado, a firm providing accounting, financial, business valuation, and statistical analysis for litigation. He holds a BA in Mathematics and Literature from UC San Diego and an MS in Operations Research from UCLA. He has more than 40 years of professional experience, including 33 years in litigation services, and has been retained as a financial expert in more than 700 engagements, testifying at trial more than 80 times. Earlier in his career he was a senior partner at Simpson & Company, a partner in litigation services at Coopers & Lybrand (now PwC) in Los Angeles, a manager in management consulting at Arthur Young & Company (now Ernst & Young), and head of technical staff at The Assessment Group, where he performed Navy economic and cost analysis. He has served as a Judicial Arbitrator for the Superior Court of California, Los Angeles County, and was an Adjunct Professor at Loyola Law School from 2003 to 2013. He has testified in state and federal courts in Arizona, California, Florida, Kentucky, Missouri, Nevada, New York, and Oregon, on antitrust, breach of contract, fraud, intellectual property, lender liability, personal injury, and wrongful termination matters. He co-authored the chapter "Use of Expert Witnesses" in Prosecuting and Defending Insurance Claims (John Wiley & Sons, 1989). He is a member of the AICPA, the National Association of Certified Valuators and Analysts (NACVA), the Association of Certified Fraud Examiners, the American Statistical Association, and the American Bar Association.
Malone is the Owner/Founder of Preeminent Solutions, Inc. (also referenced as Preeminent Solutions Engineering), a forensic and design engineering firm based in Sanford, FL. She has almost 20 years of experience in civil/structural design, forensics, and expert-witness work. She holds a Master's degree in Computational Mechanics from Carnegie Mellon University. Career history includes positions at Thornton Tomasetti, Westinghouse Electric, Jacobs Technology, Amentum, Southern Nuclear, Bechtel, General Electric, and ANSYS, with collaboration on projects for NASA, the U.S. Navy, NIST, NOAA, and NESDIS. She is a licensed PE in at least 13 jurisdictions (FL, CA, TX, VA, MD, NY, NJ, LA, GA, MS, NC, TN, and Washington D.C.). Her stated specialties are industrial and nuclear structures, earthquake analysis, wind load analysis, and finite element analysis (FEA), with forensic focus on structural failure, building envelope failure, and water infiltration. She holds small-business certifications (DBE, SSBE, MWBE, MBE, LDE) with 8(a)/WOSB pending. She works primarily in Spanish and English.
Wesley Austin is an Associate Professor of Economics at the University of Louisiana at Lafayette. His practice areas are economic damages and lost earnings analysis. He is the author of "Who and What is a Forensic Economist?", published in The Rehabilitation Professional (2014).
W. Cody Middlebrook operates FleetSafetyExpert.com from Pell City, Alabama. He is a Certified Director of Safety (CDS) and a Certified Driver Trainer (CDT), both through the North American Transportation Management Institute (NATMI), and his qualifications include OSHA 30-Hour General Industry, Hazmat Instructor, and CVSA post-crash inspection training. He holds a B.S. in Sociology, with a background in organizational behavior and systems analysis. His practice focus is reviewing compliance with federal safety regulations and industry standards, specifically: FMCSA regulatory interpretation, driver qualification/training documentation review, hours-of-service and ELD/logbook compliance analysis, maintenance-records and inspection-practice evaluation, safety management system assessments, hazmat transport documentation issues, and broker-carrier operational-control disputes. He has consulted on cases involving commercial-vehicle collisions with serious injury or fatality, alleged noncompliance with driver standards, fatigue-related claims, equipment-failure claims, and carrier safety-program reviews across multiple jurisdictions, and offers services to plaintiffs, defendants, insurers, and private entities.
Dr. Zal Phiroz is a Founding Partner of Pier Consulting Group Inc. (since April 2010, Los Angeles, CA / Windsor, ON), and holds concurrent faculty appointments as Lecturer, Innovation Technology and Operations at UC San Diego's Rady School of Management (August 2019-present), and Lecturer (Term) in Supply Chain Management/Operations Management at Harvard University's Faculty of Arts and Sciences, Division of Continuing Education (April 2013-present). He previously held a faculty role in Operations and Data Analytics at USC's Marshall School of Business (October 2014-August 2019). He holds a Ph.D. from the University of Cape Town Graduate School of Business (dissertation: "Hierarchical Decision Making Patterns for the Placement of Physical Supply Chain Entities"), an MBA in International Marketing from Wayne State University's Ilitch School of Business, a B.S. (Hons.) in Computer Information Systems from the University of Windsor, and a separate B.C.S. (Bachelor of Computer Science) also from the University of Windsor. He holds CIPM (Certified International Procurement Manager), CISCM (Certified International Supply Chain Manager), and CISCPM (Certified International Supply Chain Planning Manager) credentials from the International Purchasing and Supply Chain Management Institute. Earlier in his career he was Manager, Business Programs (Trade Marketing) at TELUS Communications (Toronto, Oct 2005-May 2007), managing a $1.8B data portfolio including Research in Motion, Palm, and Motorola accounts, and Manager, Market Planning (North America) at Procter & Gamble Co. (Cincinnati/Toronto, Sept 2007-March 2010), where he managed international supply-chain processes across P&G's $2.9B pet-care sector, developed forecasting initiatives with a projected $14M cost savings, led cross-functional shrink-reduction work yielding a stated $23M in annual savings, and ran joint-forecasting pilot programs with Walmart, Target, and Shoppers Drug Mart. At Pier Consulting Group he has worked with Procter & Gamble, DHL, and Accenture on data analysis, sustainability, and supply-chain metrics work, and he has served as an expert witness providing testimony and deposition on product-liability matters touching consumer behavior, product differentiation, and market trends. He received Amazon Inc.'s "Directors Award for Excellence - Global Fleet and Products" in 2022, a USC Dean's Award for Community Development (2017), and a USC Golden Apple Award for Clinical Faculty (2016). His publications include the Law360 article "How COVID-19 May Rattle Companies' Supply Chains" (2020) and the book "Perspectives of Supply Chain Competitiveness - A Handbook" (Xanedu, 2020). He is based in San Diego, California.
In-depth guides for trial attorneys, litigation paralegals, and consulting medical/technical experts.
What expert witnesses actually charge in 2026 — hourly rates, minimum fees, retainers, and per-case earnings — drawn from the two largest published data sets in the field, with every figure cited to its primary source.
Read Full Guide
A practical guide to Federal Rule of Evidence 702, the Daubert reliability factors, and the differential diagnosis framework — with citations to the rule text and the controlling Supreme Court decision.
Read Full Guide
Referral agencies sit between the attorney and the expert and are compensated out of that position, and few publish what the intermediation costs. A plain-language comparison of the two models, with the market data that exists.
Read Full Guide
Lack of qualifications is one of the most common — and most successful — grounds for a Daubert challenge, and it usually isn't about the expert's field, it's about whether their specific background matches the specific question. Three real federal cases, and a pre-retention checklist.
Read Full Guide
Expert disclosure isn't just naming a witness — for a retained expert it means a signed report with a specific, enumerated list of contents, on a deadline that defaults to 90 days before trial. Here's exactly what the rule requires, quoted, not paraphrased.
Read Full GuideNo agency markups. No middleman delays. Direct communication with leading courtroom experts.
Filter by medical sub-specialties, Daubert/Frye challenge history, deposition rates, and state jurisdiction licenses.
Contact expert witnesses directly to run immediate conflict checks and discuss preliminary case merits without broker fees.
Execute retention agreements directly with the expert for affidavit drafting, formal reports, depositions, and trial testimony.
⚡ Founding Registry launch: the first 20 approved experts keep their Founding Registry listing free for life ($497/yr after that). Verified Partner and Practice Group are paid tiers.
Essential visibility for active expert witnesses.
First 20 approved experts. After that, $497/yr.
Maximum exposure with verified board badge and priority placement.
Available to any listed expert, including founding members.
For medical groups or engineering firms with multiple expert witnesses.
Covers up to 5 experts under one firm.
Common questions for law firms and expert witnesses.
Our verification desk confirms active state medical licenses, board certifications (e.g., ABMS, ABOS), engineering P.E. licenses, active university faculty appointments, and verifies clean state licensing board records before granting "Verified Board" status.
Zero. Unlike legacy expert witness broker agencies that mark up hourly rates by 30% to 50%, WitnessDirect is a transparent direct directory. Attorneys retain experts directly and pay zero broker fees.
Expert witnesses pay an annual subscription fee to list their practice and credentials. Since a single testimony engagement typically pays an expert $5,000 to $25,000+, a single retention per year delivers an exceptional return on investment.
Describe your required specialty and timeline. We'll introduce 3 available experts in 24 hours.
Complete this application to join our registry of board-certified experts.
Founding Registry applications: first 20 approved experts are free for life.