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Expert Witness Directory

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Browse our verified directory of expert witnesses spanning medicine, engineering, finance, and dozens of specialized fields.

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Structural Engineering
WR

William R. O’Donnell, PE, FRSE

Managing Principal, Structural

★ 5.7

William R. O’Donnell, PE, FRSE is a structural engineering expert specializing in concept design and large-scale renovations. With a career spanning collaborations with renowned architects and diverse project types, he brings a multidisciplinary perspective to litigation work. His work centers on investigating structural integrity, assessing design compliance, and evaluating whether construction practices meet industry standards. Mr. O’Donnell has been retained in numerous expert witness and consulting engagements across the United States and the Caribbean, involving hospitality design, large-scale renovations, and mixed-use developments. His BS in Civil Engineering from the University of Miami, along with certification by the Structural Engineering Certification Board, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving structural engineering and design compliance.

Concept DesignProject ManagementLarge-scale Renovations+1
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Mechanical Engineering
D“

David “Mac” McCracken

Metals Manufacturing Expert - Expert Witness - Technical Advisor

★ 5.5

David “Mac” McCracken specializes in engineering with extensive experience in quality assurance and inspection of steel mill products, including castings, forgings, and heavy industrial machinery. His background includes roles as a Steel Pipe Mill Inspector for Exxon’s Trans-Alaska Pipeline and as a Quality Manager in a specialty alloy metals rolling mill, where he oversaw the processing of tool steels and superalloys. He has served as a Subject Matter Expert for Borg Warner Turbo Systems, focusing on turbocharger components for automotive and locomotive applications. McCracken is adept at assessing cause of loss, damage assessment, and repair scope related to metallurgical failures and industrial equipment.

Industrial MachineryExpert Witness
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Medical Devices
SW

Steven W Opolski, MS

Expert Witness

Ipswich, Massachusetts35 years+ yrs★ 5.4

Steven W Opolski, MS is a Medical Devices and Engineering expert specializing in litigation involving medical device failures and engineering assessments. With a career spanning medical device design, finite element analysis, and surgical instrument engineering, he brings a technical and analytical framework to litigation work. His work centers on investigating device failures, assessing engineering design integrity, and evaluating whether industry standards were met. Mr. Opolski has been retained in numerous expert witness and consulting engagements across various jurisdictions, involving cases related to stents, septal occluders, and surgical instruments. His MS in Mechanical Engineering from Rutgers University, along with his BS in Mechanical Engineering from Worcester Polytechnic Institute, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving medical devices and engineering failures.

Engineering
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Hydrology and Environmental Engineering
MB

Masih Bari, PhD, PE

Water Resources, Hydrology & Regulatory Compliance

Santa Monica, California★ 5.4

Masih Bari, PhD, PE brings two decades of experience in water resources planning and management, hydrology, and environmental permitting, with a practice focused on defensible technical opinions in regulatory and litigation matters. Dr. Bari’s work centers on hydrologic and hydraulic modeling and analysis, groundwater modeling and evaluation, mixing-zone and dilution analysis, stormwater and watershed planning, and water-quality modeling and compliance. His project portfolio includes groundwater sustainability planning under California’s Sustainable Groundwater Management Act (SGMA), discharge and dewatering permit strategy, and basin-level planning and model development in support of permitting and infrastructure decisions. He has performed hydrologic simulations, watershed-scale evaluations, mixing-zone and dilution studies for municipal agencies and utilities across California and the United States.

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Engineering
CA

Charles A. Budnick, PLS, CSE, M.ASCE

Expert Witness

Clinton, Massachusetts45 years+ yrs★ 5.2

Charles A. Budnick, PLS, CSE, M.ASCE is an engineering and land surveying expert specializing in boundary disputes and construction surveys. With a career spanning land surveying, site engineering, and land development, he brings a comprehensive framework to litigation work involving complex land and engineering issues. His work centers on investigating boundary disputes, assessing survey measurements, and evaluating whether construction surveys meet industry standards. Mr. Budnick has been retained in numerous expert witness and consulting engagements across various jurisdictions, involving cases related to accident mapping, adverse possession, and easements. His education from the University of Detroit, School of Engineering, along with his PLS, CSE, and M.ASCE certifications, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving land surveying and engineering matters.

Land Surveying
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Engineering
VK

Vladimir K. Markoski, PE

Expert Witness

Coral Gables, Florida20 years+ yrs★ 5.2

Vladimir K. Markoski, PE is a mechanical engineering expert specializing in HVAC, MEP design, and fire protection litigation. With a career encompassing diverse engineering disciplines, he brings a multifaceted perspective to his litigation work. His work centers on investigating HVAC system failures, assessing compliance with NFPA codes, and evaluating whether engineering standards were met. Mr. Markoski has been retained in numerous expert witness and consulting engagements across various jurisdictions, involving cases related to life safety, UL standards, and plumbing systems. His Bachelor of Science in Mechanical Engineering from the University of Belgrade reinforces his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving engineering and mechanical systems.

Mechanical Engineering
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Structural Engineering
JR

Jeremiah R Cole, PE

Expert Witness

Cold Spring, Kentucky21 years+ yrs★ 5.0

Jeremiah R Cole, PE is a Structural and Geotechnical Engineering expert specializing in litigation involving construction defects and soil stability issues. With a career spanning over two decades in civil engineering disciplines, he brings a robust analytical framework to his litigation work. His work centers on investigating structural failures, assessing geotechnical conditions, and evaluating whether engineering standards were met. Mr. Cole has been retained in numerous expert witness and consulting engagements across various jurisdictions, involving construction defect cases and infrastructure projects. His Masters in Civil Engineering from the University of Cincinnati, along with his PE certification, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving structural integrity and geotechnical assessments.

Geotechnical Engineering
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Horses
RW

Rod W Bergen, PE

Expert Witness

Malibu, California15 years+ yrs★ 5.0

Rod W Bergen, PE is a horses and engineering expert specializing in equine and solar energy litigation. With a career spanning equine facilities, solar installations, and electrical contracting, he brings a multidisciplinary perspective to his litigation work. His work centers on investigating horse accident reconstruction, assessing solar incident reconstruction, and evaluating whether equestrian facilities meet safety standards. Mr. Bergen has been retained in numerous expert witness and consulting engagements across the United States, involving equine-related incidents and solar energy disputes. His degree in Electrical Engineering from Rensselaer Polytechnic Institute reinforces his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving equine and solar energy matters.

Engineering
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Accident Reconstruction
IF

Ivo Foldyna

Expert Witness

Kamiah, Idaho30 years+ yrs★ 4.8

Ivo Foldyna is an Accident Reconstruction and Electrical Engineering expert specializing in electrocution injuries and fatalities. With a career spanning accident analysis and electrical systems, he brings a multidisciplinary perspective to litigation work. His work centers on investigating electrocution incidents, assessing accident causation, and evaluating whether electrical standards were met. Mr. Foldyna has been retained in numerous expert witness and consulting engagements across various jurisdictions, involving cases of electrocution injuries and fatalities. His degree in Electrical Engineering from the Czech Republic reinforces his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving electrical incidents.

Electrical Engineering
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Engineering
JT

Joshua Tolbert

Expert Witness

Smerna, Georgia30 years+ yrs★ 4.1

Joshua Tolbert is an engineering and premises liability expert specializing in civil engineering and industrial safety litigation. With a career spanning civil engineering, fall protection, construction analysis, and industrial safety including OSHA and NFPA standards, he brings a multidisciplinary perspective to his litigation work. His work centers on investigating engineering failures, assessing compliance with safety regulations, and evaluating whether premises liability standards have been met. Mr. Tolbert has been retained in numerous expert witness and consulting engagements across various industries, involving civil engineering and industrial safety disputes. His extensive experience in engineering and premises liability reinforces his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving engineering and safety compliance.

Premises Liability
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Brake System Engineering
PS

Paul S. Gritt

★ 3.2

Paul S. Gritt, B.S. M.E., M.S. M.E. is a brake system engineering expert specializing in vehicle testing and brake dynamometer testing. With a career spanning brake system design, computer simulation, and technical leadership, he brings a comprehensive engineering framework to litigation work. His work centers on investigating brake system failures, assessing compliance with industry standards, and evaluating whether engineering practices meet safety and performance criteria. Mr. Gritt has been retained in numerous expert witness and consulting engagements across the automotive industry, involving complex vehicle testing and brake system design cases. His M.S. M.E. in Mechanical Engineering, along with his role in the SAE Actuation sub-committee, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving brake system performance and safety compliance.

Vehicle TestingBrake Dynamometer TestingComputer Simulation+1
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