Find the Right Expert for Every Case

Economic Damages Expert Witness & Royalty Auditor

Sidney P. Blum, CPA, CFE, CPEA (E)(H&S), CFF is an economic damages and royalty audit expert specializing in intellectual property and financial litigation. With a career spanning business damages, fraud examination, and royalty audits, he brings a multifaceted analytical framework to his litigation work. His work centers on investigating financial discrepancies, assessing royalty compliance, and evaluating whether contractual obligations have been met. Mr. Blum has been retained in numerous expert witness and consulting engagements across the United States, involving intellectual property disputes, breach of contract cases, and royalty audits. His BS in Business Administration, Accounting Theory & Practice, along with certifications such as Certified Public Accountant and Certified Fraud Examiner, 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 economic damages and intellectual property.

Board Certified in General Surgery, Board Certified in Emergency Medicine

JEFFREY DURHAM DURGIN, MD, FACS is a General Surgery and Emergency Medicine expert specializing in trauma surgery and emergency medical care. With a diverse career encompassing military service, academic roles, and clinical leadership, he brings a multifaceted perspective to litigation work. His work centers on investigating surgical outcomes, assessing emergency medical interventions, and evaluating whether standard of care deviations occurred. Dr. Durgin has been retained in numerous expert witness and consulting engagements across Texas and New Mexico, involving cases in trauma surgery, emergency medicine, and bariatric procedures. His MD in Doctor of Medicine from the University of Texas Medical School, along with certifications such as Board Certified in General Surgery and Emergency Medicine, 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 surgical and emergency medical practices.

Certified Safety Professional

Bart J. Leist, CSP is a safety and health management expert specializing in OSHA compliance and accident investigation. With a career spanning safety program development, construction site safety management, and comprehensive safety audits, he brings a strategic framework to litigation work. His work centers on identifying safety program failures, conducting root-cause analyses, and evaluating whether industry standards were met. Mr. Leist has been retained in numerous expert witness and consulting engagements across the United States, involving general industry, manufacturing, and construction cases. His Master of Business Administration in Business Administration, along with his Certified Safety Professional designation, 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 safety program compliance and accident investigations.

Mechanical Engineer

John D. Zeirke, P.E. is a mechanical engineering expert specializing in accident reconstruction and vehicle fire analysis. With a career spanning mechanical inspections, product liability, and forensic investigations, he brings a comprehensive technical framework to litigation work. His work centers on investigating mechanical failures, assessing product liability claims, and evaluating whether industry standards were met in vehicle accident scenarios. Mr. Zeirke has been retained in numerous expert witness and consulting engagements across the Midwest, involving vehicle accident reconstruction, fire investigations, and mechanical failure analysis. His Bachelor of Science in Mechanical Engineering from Marquette University, along with certifications such as NAFI CFEI & CVFI and ACTAR, 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 mechanical systems and vehicle accidents.

PhD, PE, ASA, MBA, CFEI

John A. Williams, PhD, PE, ASA, MBA, CFEI is an international engineering and energy technology expert specializing in engineering analysis and financial appraisals of renewable and conventional energy systems. With a career spanning intellectual property, economic damages, and regulatory analysis, he brings a multifaceted perspective to litigation work. His work centers on investigating industrial accidents, assessing energy market dynamics, and evaluating whether engineering standards have been met. Mr. Williams has been retained in numerous expert witness and consulting engagements across the United States, involving renewable energy, conventional energy, and manufacturing technologies. His Ph.D. in Chemical and Fuels Engineering, along with certifications such as Certified Fire and Explosion Investigator, 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 technologies and industrial processes.

Licensed Site Remediation Professional

Rodger A. Ferguson Jr., Licensed Site Remediation Professional is a site remediation expert specializing in environmental compliance and hazardous substances management. With a career encompassing environmental assessments, regulatory compliance, and remediation strategy development, he brings a comprehensive framework to litigation work involving complex environmental issues. His work centers on investigating contamination sources, assessing remediation strategies, and evaluating whether regulatory compliance standards have been met. Mr. Ferguson has been retained in numerous expert witness and consulting engagements across New Jersey, involving cases related to site remediation, hazardous waste management, and environmental compliance. His Master of Science in Environmental Science from Rutgers University, along with his Licensed Site Remediation Professional certification from the New Jersey Department of Environmental Protection, 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 site contamination and remediation efforts.

SE, PE, CBO, PMP, PMI-ACP

Marcor G. Platt, SE, PE, CBO, PMP, PMI-ACP is a structural and forensic engineering expert specializing in structural design, forensic analysis, and project management. With a career encompassing diverse engineering disciplines, he brings a multifaceted perspective to litigation work involving complex structural and civil engineering issues. His work centers on investigating structural failures, assessing compliance with building codes, and evaluating project management practices. Mr. Platt has been retained in numerous expert witness and consulting engagements across the Southwestern United States, Pacific Northwest, and US Virgin Islands, involving residential, commercial, and industrial building cases. His MS in Civil Engineering, structural emphasis, along with certifications such as Certified Building Official (CBO) and Project Management Professional (PMP), 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, construction defects, and environmental compliance.

P.E., CXLT

William H. ElDorado, P.E., CXLT is a premises liability and property damage expert specializing in post-incident evaluations of slips, trips, and falls. With a career spanning engineering design, forensic analysis, and expert witness consulting, he brings a multidisciplinary framework to his litigation work. His work centers on investigating slip resistance, assessing structural integrity, and evaluating whether accessibility standards were met. Mr. ElDorado has been retained in numerous expert witness and consulting engagements across Texas, Arkansas, Kansas, Oklahoma, Louisiana, Missouri, and New Mexico, involving premises liability and property damage cases. His Bachelor of Science Degree in Civil Engineering, along with certifications as a Certified Operator of English XL Tribometer and Licensed Professional Engineer, 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 slip, trip, and fall incidents.

Aviation Accident Investigator

Keith M. Cianfrani, Ed.D, (abd), MAS, CISM is an aviation accident investigation expert specializing in accident investigations and FAA enforcement proceedings. With a career spanning military aviation safety, commercial piloting, and safety consulting, he brings a multifaceted perspective to litigation work. His work centers on investigating aviation accidents, assessing risk management practices, and evaluating whether safety management systems were properly implemented. Mr. Cianfrani has been retained in numerous expert witness and consulting engagements across the United States, involving aviation accident investigations and safety audits for Part 135 and Part 91 operators, among others. His MAS in Aviation Safety from Embry Riddle Aeronautical University, along with his Certified Flight Instructor (CFI) 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 aviation safety and human factors.

Court Qualified Expert Witness

Jack Cohen is a Court Qualified Expert Witness specializing in Automotive Dealership Operations and Real Estate Transactions. With a career spanning over four decades in dealership operations, financial analysis, and real estate lending, he brings a multifaceted perspective to litigation work. His work centers on investigating dealership fraud, assessing real estate loan compliance, and evaluating vehicle valuation disputes. Mr. Cohen has been retained in numerous expert witness and consulting engagements across the United States, involving automotive dealership operations, real estate transactions, and private money lending. His High School Diploma from Grant High School, along with certifications such as the Gemologist Certificate from the Gemological Institute of America and a Licensed Automobile Dealer, 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 and responsibility in disputes involving dealership operations and real estate transactions.

Independent Security Consultant

Michael Johnston, M.A., B.A., PCI, CPP, Certified Use of Force Analyst, CPD is a forensic security consulting expert specializing in premise liability and use of force litigation. With a career spanning security operations, law enforcement leadership, and forensic analysis, he brings a strategic investigative framework to his litigation work. His work centers on investigating security failures, assessing use of force incidents, and evaluating whether industry standards were met. Mr. Johnston has been retained in numerous expert witness and consulting engagements across Nevada, involving cases in casinos, hotels, and multi-housing properties. His M.A. in Organizational Culture and Leadership, along with certifications such as Professional Certified Investigator (PCI) and Certified Protection Professional (CPP), 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 inadequate security and negligent training.

Physician-Scientist and Professor Emeritus

James M Sonner, MD is a pharmacology and anesthesiology expert specializing in drug interactions, perioperative medication safety, and the identification of adverse drug reactions or toxic effects. With a career spanning chemistry, pharmacology, and clinical medicine, he brings a scientifically rigorous framework to litigation work involving complex pharmacological outcomes. His work centers on investigating drug interactions, assessing perioperative medication safety, and evaluating whether adverse drug reactions have occurred. Dr. Sonner has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to pharmacology of the nervous system and anesthesiology. His Doctor of Medicine from Harvard Medical School, along with certifications from the American Board of Anesthesiology and the Drug Enforcement Administration, 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 drug interactions and toxicology.

President and Partner

Michael P Menz, CIH, CHMM is an industrial hygiene expert specializing in environmental consulting and indoor air quality assessments. With a career spanning industrial hygiene, environmental consulting, and hazardous materials management, he brings a comprehensive framework to litigation work involving environmental health and safety. His work centers on investigating asbestos and mold contamination, assessing silica exposure risks, and evaluating whether industry standards for indoor air quality have been met. Mr. Menz has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to asbestos, mold, lead-based paint, and other hazardous materials. His Bachelor of Science in General Studies from Villanova University, along with certifications such as Certified Industrial Hygienist and Certified Hazardous Materials Manager, 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 industrial hygiene and environmental safety.

Global Labeling Strategist: Clinical, Regulatory, Risk, Safety

Debra M. Leibold, MD, PhD is a pharmaceutical regulation expert specializing in labeling strategy and compliance within the global pharmaceutical industry. With a career spanning clinical risk management, safety surveillance, and regulatory labeling, she brings a strategic framework to litigation work involving complex pharmaceutical labeling disputes. Her work centers on investigating labeling inconsistencies, assessing regulatory compliance, and evaluating whether safety standards have been met. Dr. Leibold has been retained in numerous expert witness and consulting engagements across the US, EU, and Japan, involving cases related to pharmaceutical labeling, regulatory compliance, and safety surveillance. Her MD and PhD in Medicine and Molecular Biology, along with her Medical Physician & Surgeon license in Pennsylvania, reinforce her ability to deliver objective, defensible analyses. She is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of regulatory compliance in disputes involving pharmaceutical labeling and safety standards.

MSME, PE

Karl R. Leinsing, MSME, PE is a medical device engineering expert specializing in full life cycle medical device product development and consulting. With a career encompassing mechanical engineering, regulatory compliance, and innovative design, he brings a comprehensive framework to litigation work involving complex product development and patent disputes. His work centers on investigating patent infringement, assessing product liability, and evaluating whether industry standards were met in medical device development. Mr. Leinsing has been retained in numerous expert witness and consulting engagements across the United States, Canada, EPO, USPTO, ITC, and Australia, involving patent and liability cases in the medical device industry. His M.S. in Mechanical Engineering from North Carolina A&T State University, along with his Professional Engineer license in NH, 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 device design and functionality.

Human Resource Management, Expert Witness Consultation

Maureen Clark, SHRM-SCP, SPHR-CA is a Human Resource Management expert specializing in employment and management litigation. With a career spanning infrastructure development, problem-solving, and neutral fact-finding, she brings a comprehensive framework to her litigation work. Her work centers on investigating workplace practices, assessing compliance with HR standards, and evaluating whether employment policies have been properly implemented. Ms. Clark has been retained in numerous expert witness and consulting engagements across the United States, involving high tech, manufacturing, services, not-for-profit, education, and public sectors. Her M. Ed. in Counseling from San Jose State University, along with certifications such as SHRM-SCP and SPHR-CA, reinforce her ability to deliver objective, defensible analyses. She is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving employment practices, wrongful termination, and workplace discrimination.

President & CEO

Joshua Weiner, NABCEP is an energy and construction engineering expert specializing in solar PV, energy storage, and microgrid design. With a career spanning solar project development, energy technologies, and policy frameworks, he brings a comprehensive understanding of the technical and regulatory aspects critical to litigation work. His work centers on investigating compliance with industry standards, assessing the viability of energy solutions, and evaluating whether project implementations meet contractual obligations. Mr. Weiner has been retained in numerous expert witness and consulting engagements across the United States, involving utility-scale, commercial, industrial, and residential solar and energy storage projects. His BA in Astrophysics/Astronomy, along with NABCEP 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 responsibility in disputes involving energy technologies and project execution.

Traffic Collision Reconstructionist

Daniel McLain, ACTAR, FAA sUAV Pilot is a traffic collision reconstruction expert specializing in accident causation and analysis. With a career spanning law enforcement, accident investigation, and drone technology, he brings a multifaceted perspective to litigation work. His work centers on investigating collision dynamics, assessing crash data retrieval, and evaluating whether traffic enforcement standards were met. Mr. McLain has been retained in numerous expert witness and consulting engagements across Southern California, involving vehicular manslaughter, insurance fraud, and multi-fatal collisions. His BS in Criminal Justice, along with certifications from the Accreditation Commission for Traffic Accident Reconstruction and the FAA, 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 traffic accidents and enforcement.