Expert Witness Directory

Find the Right Expert
for Every Case

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

Medical Engineering Finance Forensic Psychology Construction Accounting Technology

Showing 19–36 of 76 experts

AI-powered search

Handwriting analysis

GW

Grace Warmbier

AI, Software Development & Patent Expert

New York, NY12 years+ yrs★ 8.6

Grace Warmbier, Bachelors of Science in Forensic Science, Bachelors of Science in Biology is a forensic document examination expert specializing in questioned document analysis. With a career encompassing roles in law enforcement and private practice, she brings a comprehensive understanding of forensic methodologies to her litigation work. Her work centers on investigating handwriting comparisons, assessing counterfeit documents, and evaluating alterations in legal documents. Ms. Warmbier has been retained in numerous expert witness and consulting engagements across New York, involving criminalistics and document examination cases. Her Bachelors of Science in Forensic Science and Biology, along with her professional training and experience at the NYPD Police Laboratory, reinforce her ability to deliver objective, defensible analyses. She is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of authenticity and alterations in disputes involving questioned documents.

Signature analysisForgeriesDisguised writing+14

Neurology

AE

Ali Ezzati, M.D.

Associate Professor of Neurology

Irvine, CA15 years+ yrs★ 8.5

Ali Ezzati, M.D. is a neurology and neuroinformatics expert specializing in cognitive neurology and neuroimaging litigation. With a career spanning academic neurology, neuroinformatics, and cognitive disorder research, he brings a multidisciplinary perspective to his litigation work. His work centers on investigating causation in neurological disorders, assessing standard of care in cognitive impairment cases, and evaluating whether deviations in neuroimaging protocols have occurred. Dr. Ezzati has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to cognitive impairment, stroke, and device litigation. His M.D. in Medicine, along with his postdoctoral fellowships in Neuroimaging & Clinical Informatics and Neuroepidemiology & Cognitive Neurology, 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 neurological disorders and neuroimaging practices.

TechnologyNeuroinformaticsCognitive Neurology

Software Engineering

BS

Bert Schiettecatte

Senior Software & Hardware Engineer, Computer Scientist, Expert Witness

Los Angeles, CA20+ years+ yrs★ 8.5

Bert Schiettecatte, MSc/CS, MA/MST is an intellectual property litigation expert specializing in software and hardware engineering disputes. With a career spanning software development, digital signal processing, and consumer electronics, he brings a multidisciplinary approach to his litigation work. His work centers on investigating software source code for patent infringement, assessing hardware systems for trade secret misappropriation, and evaluating whether breaches of contract have occurred. Mr. Schiettecatte has been retained in numerous expert witness and consulting engagements across the United States, involving intellectual property disputes in the software and electronics industries. His Master of Science in Computer Science, along with his Master of Arts in Music, Science and Technology, 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 software architecture and performance optimization.

ElectronicsTestifying expert witness with intellectual property litigation experienceSoftware source code review and analysis for intellectual property litigation+28

Information Technology and Computers

WS

Wayne S. Josleyn

Digital Forensics Expert and Data Recovery Engineer

Boise, ID★ 8.5

Wayne S. Josleyn, EnCE, CCE, CDRS, MCP, OFE is a digital forensics expert specializing in data recovery and forensic investigations. With a career encompassing digital evidence analysis, data recovery engineering, and forensic methodology development, he brings a comprehensive technical framework to litigation work. His work centers on investigating digital evidence authenticity, assessing data recovery possibilities, and evaluating whether forensic procedures meet industry standards. Mr. Josleyn has been retained in numerous expert witness and consulting engagements across the United States and Canada, involving cases such as embezzlement, cyberstalking, and trade secret theft. His Master of Science in Digital Forensic Science from Champlain College, along with certifications such as EnCase Certified Examiner (EnCE) and Certified Data Recovery Specialist (CDRS), 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 digital forensics and data integrity.

Digital ForensicsData Recovery

Banking

DL

David L. Peterson

Expert Witness

Baton Rouge, LA40 years+ yrs★ 8.5

David L. Peterson is an electronic payments and banking systems expert specializing in patent litigation and banking technology disputes. With a career spanning electronic payments, online banking systems, and core banking processing systems, he brings a strategic and technical framework to his litigation work. His work centers on investigating patent infringement claims, assessing the validity of banking technology patents, and evaluating whether banking procedures adhere to industry standards. Mr. Peterson has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to electronic payments, online banking systems, and core banking processing systems. His A.A. in Computer Technologies from Palm Beach Community College, along with his extensive industry experience, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of patent validity and infringement in disputes involving banking technology and electronic payment systems.

TechnologyElectronic Payments and Related SystemsOnline Banking Systems+2

Information Technology Director and Project Manager

IZ

Ivan Zatkovich

Intellectual Property Consulting & Patent Litigation

Tampa, FL30+ years+ yrs★ 8.5

Ivan Zatkovich is an intellectual property consulting and patent litigation expert specializing in telecommunications and internet technology patents. With a career spanning information technology management, e-commerce, and telecommunications, he brings a strategic framework to evaluating complex patent portfolios and identifying potential prior art. His work centers on investigating patent validity, assessing market valuation, and evaluating licensing opportunities. Mr. Zatkovich has been retained in numerous expert witness and consulting engagements across the United States, involving telecommunications, internet, and software disputes. His B.A. and B.S. in Computer Science, along with his M.S. in Computer Networks, and certifications as a Certified e-Commerce Solutions Expert — IBM Websphere and CMM & PMP in project management methodologies, 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 telecommunications and internet technologies.

Publishing / Content ManagementInternet and e-CommerceTelecommunications+7

Software Engineering

SR

Scott Ruthfield

Founder/CEO

Seattle, WA25+ years+ yrs★ 8.5

Scott Ruthfield is a software engineering and technology development expert specializing in software engineering best practices, software consulting expectations and deliverables, and information technology staffing. With a career spanning leadership roles in software engineering, technology development, and IT staffing services, he brings a strategic perspective to litigation work. His work centers on investigating software engineering processes, assessing consulting deliverables, and evaluating whether IT staffing meets industry standards. Mr. Ruthfield has been retained in numerous expert witness and consulting engagements across the United States, involving cases in software engineering, IT staffing, and technology consulting. His Master of Computer Science from Rice University, along with his extensive experience in software engineering and consulting, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of standard of care in disputes involving complex software and system design.

InternetSoftware engineering best practicesSoftware consulting expectations and deliverables+10

Chemistry & Chemicals

JB

Justin B. Sambur

Monfort Professor of Chemistry

Fort Collins, CO16 years+ yrs★ 8.5

Justin B. Sambur, Monfort Professor of Chemistry is an analytical chemistry and materials characterization expert specializing in determining the presence, absence, identity, and quantity of hazardous or regulated materials in complex systems. With a career focused on energy, sustainability, and advanced manufacturing, he brings a methodical approach to measurement, data integrity, and clear explanation of findings. His work centers on investigating materials failures or contamination events, assessing nanotechnology and nanoparticle synthesis, evaluating whether deviations in battery, solar, and electrolyzer technologies have occurred. Mr. Sambur has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to hazardous materials, environmental contamination, and intellectual property disputes. His Ph.D. in Chemistry, along with his NSF Postdoctoral Fellowship in Chemistry, 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 chemical exposure and forensic chemical analysis.

Intellectual PropertyAnalytical ChemistryMaterials Characterization+2

Computers and Information Technology

JG

Joseph Greenfield

Vice President & Chief Forensic Examiner

Simi Valley, CA15 years+ yrs★ 8.5

Joseph Greenfield, Ph.D. is a digital forensics expert specializing in cyber breach investigations and electronic evidence analysis. With a career encompassing advanced research in digital forensics and practical application in forensic examinations, he brings a robust analytical framework to litigation work. His work centers on investigating cyber incidents, assessing digital evidence integrity, and evaluating whether security protocols were breached. Dr. Greenfield has been retained in numerous expert witness and consulting engagements across the United States, involving complex cyber investigations and digital forensics cases. His Ph.D. in Computer Science, Concentration in Digital Forensics, along with his GIAC Certified Forensic Analyst (GFCA) 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 cybersecurity breaches and digital evidence.

Digital ForensicsCybersecurity

Cybersecurity

BS

Bruce Schneier

Security Technologist

Cambridge, MA39 years+ yrs★ 8.5

Bruce Schneier is a cybersecurity expert specializing in cryptography, internet security, and privacy. With a career spanning roles in security architecture, technology leadership, and academic research, he brings a multifaceted perspective to litigation work. His work centers on investigating security breaches, assessing cryptographic vulnerabilities, and evaluating whether privacy protocols meet industry standards. Mr. Schneier has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to cybersecurity breaches, privacy violations, and cryptographic integrity. His MS in Computer Science from American University, along with his extensive board memberships and academic affiliations, 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 cybersecurity and privacy issues.

Information Technology

Gaming & Gambling

DT

Dr Tony Morelli

Professor, Inventor, Executive Consultant

Mt Pleasant, SC25 years+ yrs★ 8.4

Dr Tony Morelli, PhD is a gaming technology expert specializing in complex gaming technology litigation. With a career bridging academia and industry, he brings a strategic perspective to litigation work, informed by his experience in software engineering, gaming technology, and accessible design. His work centers on investigating regulatory compliance, assessing patent validity, and evaluating whether technological implementations meet industry standards. Dr Morelli has been retained in numerous expert witness and consulting engagements across the United States, involving patent litigation and gaming technology disputes. His PhD in Computer Science and Engineering, along with his extensive experience in software engineering and gaming technology, 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 gaming systems and software compliance.

Artificial IntelligenceSoftware EngineeringGaming Technology+1

Physical Therapy

UH

Uzair Hammad

Neurologic Physical Therapy Expert Witness

Orlando, FL★ 8.4

Uzair Hammad, PT, DPT, NCS, ATP is a neurologic physical therapy expert specializing in spinal cord injury, stroke, and traumatic brain injury rehabilitation. With a career encompassing advanced rehabilitation technology and complex patient management, he brings a multifaceted approach to evaluating rehabilitation protocols and outcomes. His work centers on investigating standard of care in neurologic PT, assessing rehabilitation technology applications, and evaluating causation in functional impairments. Mr. Hammad has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to spinal cord injuries, stroke rehabilitation, and assistive technology. His Doctor of Physical Therapy from the University of Central Florida, along with Board-Certified Neurologic Clinical Specialist (NCS) and Assistive Technology Professional (ATP) 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 standard of care in disputes involving neurologic rehabilitation and assistive technology.

NeurologyStandard of care in neurologic PT and rehabilitationSpinal cord injury rehab+4

Gear and bearing design and analysis

HD

Hanspeter Dinner

Managing Director

Bubikon★ 8.4

Hanspeter Dinner, Dipl. Masch. Ing. ETH, Dipl. Vertriebsingenieur VDI is a gear and bearing design and analysis expert specializing in mechanical engineering litigation. With a career encompassing roles in software support, project engineering, and global sales, he brings a multifaceted perspective to his litigation work. His work centers on investigating gear and bearing failures, assessing engineering analysis processes, and evaluating whether design processes meet certification standards. Mr. Dinner has been retained in numerous expert witness and consulting engagements across Europe and Asia, involving wind turbines, industrial gearboxes, and fine pitch gear industries. His Dipl. Masch. Ing. ETH in Mechanical Engineering, along with his Dipl. Vertriebsingenieur VDI, 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 gear and transmission optimization.

FEM analysisTorsional dynamicsSlewing bearing calculations+9

Technology

CW

Chris Woodruff

Leader, Architect, Developer, Advocate

Wyoming, MI18 years+ yrs★ 8.4

Chris Woodruff is a technology and information technology expert specializing in software architecture, cloud migration, and developer relations. With a career spanning distributed systems, system modernization, and secure application development, he brings a strategic framework to litigation work involving technology strategy and software failure analysis. His work centers on investigating software quality, assessing application security, and evaluating whether industry best practices were followed. Mr. Woodruff has been retained in numerous expert witness and consulting engagements across North America, involving technology strategy, software development best practices, and cloud architecture. His Bachelor’s Degree in Computer Science, along with recognitions such as Microsoft MVP and AWS Community Builder, 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 software architecture and cloud computing.

Information TechnologyDeveloper RelationsAgile Software Development+19

Energy

CJ

Christopher J. Russo

Vice President

Boston, MA28 years+ yrs★ 8.3

Christopher J. Russo, MS is an energy economics and consulting expert specializing in investment strategy, economic analysis, and asset valuation within the electricity and gas industries. With a career spanning strategic planning, regulatory economics, and market operations, he brings a comprehensive understanding of global energy markets to his litigation work. His work centers on investigating market dynamics, assessing regulatory compliance, and evaluating the economic implications of energy projects. Mr. Russo has been retained in numerous expert witness and consulting engagements across North America, Europe, and the Middle East, involving electricity and gas market operations, regulatory disputes, and asset valuations. His MS in Technology & Policy (Energy) from the Massachusetts Institute of Technology, along with his BS in Mechanical Engineering from Tufts University, 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 energy market economics and operations.

ElectricityElectricity and gas marketsInvestment strategy+4

Technology

JB

Joel Beal

Truck Technology Consultant

Arlington, TX35 years+ yrs★ 8.3

Joel Beal is a trucking technology expert specializing in telematics, electronic logging devices (ELDs), and transportation management systems. With a career spanning system design, regulatory advisory roles, and commercial fleet operations, he brings a multifaceted perspective to litigation work. His work centers on investigating compliance with commercial motor vehicle regulations, assessing the integration of telematics and ELD systems, and evaluating whether transportation management practices meet industry standards. Mr. Beal has been retained in numerous expert witness and consulting engagements across North America, involving commercial motor vehicle regulations, telematics systems, and fleet operations. His AA/AS in Business Management from Iowa Western Community College, along with his extensive experience in the trucking industry, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of compliance and responsibility in disputes involving trucking technology and operations.

TruckingTelematicsELDs+2

Mining

JS

Jill Shackelford

Mining and Asphalt Executive

Austin, Texas37 years+ yrs★ 8.3

Jill Shackelford, BBA is a mining and asphalt executive specializing in environmental compliance and permitting within the construction and aggregate industries. With a career spanning strategic market placement, quality control, and regulatory navigation, she brings a comprehensive operational framework to litigation work. Her work centers on investigating environmental compliance, assessing regulatory adherence, and evaluating whether industry standards were met. Ms. Shackelford has been retained in numerous expert witness and consulting engagements across Texas, involving asphalt production, aggregate mining, and environmental permitting cases. Her BBA in Management from Texas Tech University, along with continuing education in Aggregate Properties and Testing from Auburn University, reinforce her ability to deliver objective, defensible analyses. She is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of compliance and responsibility in disputes involving environmental regulations and construction practices.

ConstructionAsphalt, Aggregate and Seal projectsEnvironmental Compliance and Permitting+16

Telecommunications

DH

David Hilliard Williams

President and Founder

Saint Louis, Missouri40 years+ yrs★ 8.3

David Hilliard Williams is a wireless and IoT technology expert specializing in product and technology development, implementation, and intellectual property litigation services. With a career spanning telecommunications, geotechnical engineering, and location-based services, he brings a multifaceted perspective to his litigation work. His work centers on investigating GPS and network-based location determination systems, assessing wireless 911 and NG911 technologies, and evaluating IoT data privacy and security. Mr. Williams has been retained in numerous expert witness and consulting engagements across the U.S., involving patent, ITC, and criminal litigation, as well as civil trade secrets and product liability cases. His MBA in Information Systems Management from The University of Texas at Austin, along with his BSEE in Digital System Design from Purdue University, 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 wireless communications and IoT systems.

Geotechnical EngineeringLocation-Based Services (LBS)GPS Systems+94

AI-Powered Matching

Need a smarter search?

Create a free account to access our AI-powered expert matching and save your searches for future cases.

Get Started Free

Trusted by law firms, insurers, and legal teams