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Mark R. Mannex, PE

Expert Witness

Mark R. Mannex, PE is a fire protection engineering expert specializing in fire safety and engineering systems. With a career encompassing fire protection engineering, hazardous materials safety, and process safety, he brings a comprehensive understanding of fire safety systems and their application in various industrial settings. His work centers on investigating fire damage, assessing fire protection systems, and evaluating whether safety standards have been met. Mr. Mannex has been retained in numerous expert witness and consulting engagements across the United States, involving fire protection engineering and hazardous materials safety cases. His BSME from the University of Florida, along with his certifications in Mechanical and Fire Protection Professional Engineering, 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 fire protection systems and safety engineering.

Carl H. Josephson, P.E., S.E.

Sr. Principal Structural Engineer

Carl H. Josephson, P.E., S.E. is a structural engineering expert specializing in professional liability claims and construction defect litigation. With a career spanning wood, masonry, steel, and concrete engineering, he brings a comprehensive understanding of industry standards and practices to his litigation work. His work centers on investigating structural failures, assessing code compliance, and evaluating whether standard of care deviations occurred. Mr. Josephson has been retained in extensive expert witness and consulting engagements across the United States, involving insurance claims, professional liability claims, and construction defect cases. His BSCE in Civil Engineering from San Diego State University, along with his numerous professional engineering licenses, 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 structural engineering and construction practices.

Timothy J.F. van Oss, PE

Timothy J.F. van Oss, PE is a civil and structural engineering expert specializing in forensic structural engineering and real estate development. With a career encompassing civil and structural engineering, land surveying, and property management, he brings a multidisciplinary perspective to litigation work. His work centers on investigating structural failures, assessing engineering design compliance, and evaluating whether construction practices meet industry standards. Mr. van Oss has been retained in numerous expert witness and consulting engagements throughout New York, involving cases related to structural engineering, real estate development, and property management. His MS in Civil Engineering from the University at Buffalo, along with his Professional Engineer registration in New York, 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 engineering design.

Mohamed A Younis, PE

Expert Witness

Mohamed A Younis, PE is a geotechnical engineering expert specializing in subsurface and tunnel-related litigation. With a career spanning geotechnical engineering, subsurface analysis, and tunnel construction, he brings a comprehensive understanding of underground engineering challenges to his litigation work. His work centers on investigating subsurface conditions, assessing tunnel integrity, and evaluating whether construction practices meet industry standards. Mr. Younis has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to underground construction, tunnel projects, and substructure developments. His MS in Geotechnical Engineering from the University of Maryland, along with his BS in Civil Engineering from Alexandria University Egypt, 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 geotechnical and subsurface engineering issues.

Harvey Stone

Expert Witness

Harvey Stone is a railroad and civil engineering expert specializing in railroad track, equipment, and structural litigation. With a career spanning multiple decades in engineering and consulting, he brings a robust framework for analyzing complex transportation and infrastructure disputes. His work centers on investigating track-related injuries, assessing railroad grade crossings, and evaluating whether railroad structures meet industry standards. Mr. Stone has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to railroad structures, streetcar tracks, and surface transportation. His education from Rensselaer Polytechnic Institute, along with his licensure as a Professional Engineer in AR, CO, FL, GA, MD, ME, MI, MN, MO, MT, NC, NH, NY, OK, PA, TN, TX, UT, VA, WI, IA, MA, NE, NV, OR, RI, SC, VT, WA, WY, 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 railroad and civil engineering matters.

Jeffrey W Buckholz, PhD, P.E., PTOE

Traffic Engineering Expert

Jeffrey W Buckholz, PhD, P.E., PTOE is a traffic engineering expert specializing in construction defects. With a career spanning traffic signal analysis, pedestrian safety, and crash investigation, he brings a comprehensive framework to litigation work. His work centers on investigating traffic accidents, assessing work zone safety, and evaluating whether sight distance standards were met. Mr. Buckholz has been retained in numerous expert witness and consulting engagements across the United States, involving traffic signal operations, roadway design, and pedestrian safety. His PhD in Civil Engineering, along with certifications as a P.E. and PTOE, 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 engineering and construction defects.

Douglas B Blatchford, PE, PH, CEM, CFM

Expert Witness

Douglas B Blatchford, PE, PH, CEM, CFM is a hydrology and engineering expert specializing in flooding and floodplain management litigation. With a career spanning over four decades in floodplain management, drainage, and hydraulic structures, he brings a comprehensive perspective to litigation involving water resource issues. His work centers on investigating flooding events, assessing drainage systems, and evaluating whether hydraulic structures meet regulatory standards. Mr. Blatchford has been retained in numerous expert witness and consulting engagements across the southwestern United States, involving cases related to surface water hydrology, erosion, and permitting. His Master of Geographic Information Systems from The Pennsylvania State University, along with certifications such as PE (AZ, CA, CO, NM, NV, TX, UT) and FAA small Unmanned Aerial Systems (sUAS) pilot, 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 water resource issues.

Chuck Dutill, PE, DFE

Expert Witness

Chuck Dutill, PE, DFE is an Environmental and Engineering expert specializing in hydrology, stormwater management, and wastewater systems litigation. With a career spanning over four decades in hydrology, sewer systems, and environmental engineering, he brings a comprehensive technical framework to litigation work. His work centers on investigating flooding causes, assessing stormwater management practices, and evaluating whether sewer system failures contributed to property damage. Mr. Dutill has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to hydrology, wastewater treatment, and environmental engineering. His BS in Civil and Environmental Engineering from Cornell University, along with his Board Certified Forensic Engineer designation as a Senior Member of the National Academy of Forensic Engineers (NAFE), 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 groundwater contamination, stormwater runoff, and infrastructure failures.

Grant Johnson

Principal, Project Manager/Engineer

Grant Johnson, TE is a traffic engineering expert specializing in transportation planning and litigation involving traffic safety and roadway conditions. With a career encompassing leadership roles in both domestic and international projects, he brings a global perspective to his expert witness work, particularly in cases involving complex traffic scenarios. His work centers on investigating roadway and traffic conditions, assessing compliance with traffic control standards, and evaluating whether design and safety principles have been adhered to. Mr. Johnson has been retained in numerous expert witness and consulting engagements across several western US states, including California, Hawaii, Utah, Arizona, and Washington, involving cases such as vehicle accidents, traffic control device compliance, and roadway design flaws. His BS in Civil Engineering from California State University, Sacramento, along with his registration as a Traffic Engineer in California (TR#1453), 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 traffic engineering and safety.

Alexei V Klimenko, PhD

Expert Witness

Alexei V Klimenko, PhD is a nuclear engineering expert specializing in radiation and nuclear technology litigation. With a career encompassing space-based systems, remote sensing, and aerospace engineering, he brings a multidisciplinary perspective to his litigation work. His work centers on investigating radiation exposure incidents, assessing compliance with nuclear safety standards, and evaluating whether aerospace engineering practices meet regulatory requirements. Mr. Klimenko has been retained in numerous expert witness and consulting engagements across the United States, involving nuclear physics, aerospace engineering, and space-based systems. His PhD in Nuclear Physics, along with an MS in Electrical Engineering, 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 nuclear and aerospace technologies.

Michael A Schellinger

Annuity & Insurance Sales Abuse Expert

Michael A Schellinger, RICP®, CLTC®, NSSA®, EA, Series 65 is a chemical engineering expert specializing in hazardous chemicals and process safety litigation. With a career spanning monomers and polymers chemistries, he brings a robust understanding of chemical processes and safety protocols to his litigation work. His work centers on investigating chemical incidents, assessing process safety management compliance, and evaluating whether industry standards were met in chemical plant operations. Mr. Schellinger has been retained in numerous expert witness and consulting engagements across the United States, involving chemical plants, petrochemical industries, and process safety cases. His BS in Chemical Engineering from the University of Illinois - Urbana Champaign, along with certifications such as RICP®, CLTC®, and NSSA®, 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 process safety and hazardous materials.

Randy Gray, CHST, CSHM, GSP, OHST, BS, MS

Expert Witness

Randy Gray, CHST, CSHM, GSP, OHST, BS, MS is an OSHA and Safety expert specializing in agricultural, construction, and manufacturing accident litigation. With a career spanning over three decades in industrial hygiene, loss control, and risk management, he brings a multifaceted perspective to his litigation work. His work centers on investigating workplace safety compliance, assessing accident causation, and evaluating whether industry standards were met. Mr. Gray has been retained in numerous expert witness and consulting engagements across the United States, involving OSHA-related cases, industrial accidents, and safety audits. His B.S. and M.S. degrees from Murray State University, along with certifications as a Construction Health and Safety Technologist, Certified Safety & Health Manager, Graduate Safety Practitioner, and Occupational Health and Safety Technologist, 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 workplace safety and compliance.

Joseph DiPompeo, PE, F.SEI, F.ASCE

Expert Witness

Joseph DiPompeo, PE, F.SEI, F.ASCE is a structural engineering expert specializing in construction defects. With a career encompassing diverse aspects of building envelopes, civil engineering, and forensic investigation, he brings a multifaceted perspective to litigation work. His work centers on investigating construction defects, assessing structural failures, and evaluating whether construction delays have impacted project outcomes. Mr. DiPompeo has been retained in numerous expert witness and consulting engagements across the United States, involving construction cost estimates, real estate due diligence, and failure analysis. His B. Eng and M. Eng degrees from Stevens Institute of Technology, along with his 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 construction contracts and property maintenance.

Moiz Khan, PhD

Expert Witness

Moiz Khan, PhD is an engineering and medical devices expert specializing in surgical and medical robotics litigation. With a career encompassing rehabilitation, simulation, and design, he brings a multidisciplinary framework to his litigation work. His work centers on investigating surgical robotics applications, assessing medical device compliance, and evaluating whether design strategies meet industry standards. Mr. Khan has been retained in numerous expert witness and consulting engagements across the United States, involving surgical robotics, medical device design, and artificial intelligence in healthcare. His PhD in Engineering from Columbia University, along with his MBA from Brown University and Post-Doctoral work at Harvard Medical School, 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 robotics and medical devices.

MARK MALOUF, PE, SE

MARK MALOUF, PE, SE is a telecommunication tower design and structural engineering expert specializing in forensic engineering and expert witness testimony. With a career encompassing special structures design and analysis for wireless and microwave carriers, broadcasters, wind farms, and public and private entities, he brings a comprehensive understanding of the technical and regulatory frameworks that govern tower construction and maintenance. His work centers on investigating catastrophic tower failures, assessing compliance with industry standards, and evaluating whether design deviations contributed to structural issues. Mr. Malouf has been retained in numerous expert witness and consulting engagements across the United States, involving telecommunication tower design, construction disputes, and zoning ordinance revisions. His Master of Science in Structural Engineering and Construction Management, along with his Bachelor of Science in Civil Engineering, 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 telecommunication structures and standards compliance.

David Alley, PE

Expert Witness

David Alley, PE is an electrical and mechanical engineering expert specializing in switchgear and protection and control systems design. With a career spanning electrical engineering, mechanical engineering, and systems commissioning, he brings a multidisciplinary perspective to litigation work. His work centers on investigating installation practices, assessing performance testing outcomes, and evaluating whether industry standards were met in troubleshooting scenarios. Mr. Alley has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to electrical systems and mechanical installations. His BS in Electrical Engineering from Clemson University, along with his Registered Professional Electrical Engineer certification in as many as 47 states and territories, 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 electrical and mechanical engineering systems.

Andrew E Madden, Esq., LL.M (US Law), LL.M, MSc, LL.B (Hons), CEng, CMarEng, FIMarEST, FRINA

Marine Surveyor, Maritime Consultant

Andrew E Madden, Esq., LL.M (US Law), LL.M, MSc, LL.B (Hons), CEng, CMarEng, FIMarEST, FRINA is a maritime and engineering expert specializing in machinery damages, ship explosions, and professional indemnity cases. With a career spanning four decades in marine engineering, maritime law, and consultancy, he brings a multifaceted perspective to litigation work. His work centers on investigating machinery damages, assessing ship explosions, and evaluating whether professional indemnity standards have been met. Mr. Madden has been retained in numerous expert witness and consulting engagements across the United States and the United Kingdom, involving cases related to oil pollution, marine casualties, and cruise ship incidents. His LL.M Masters in US Law, along with certifications such as CEng and CMarEng, 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 maritime fires, emissions, and drydocking operations.

Andrew Patera, PhD

Biomedical Engineer

Andrew Patera, PhD is a Biomedical Engineering expert specializing in molecular diagnostics and biosensing technologies. With a career encompassing interdisciplinary research in materials chemistry, device fabrication, and computational chemistry, he brings a multifaceted approach to his litigation work. His work centers on investigating novel diagnostic methods, assessing biosensor efficacy, and evaluating the integration of molecular probes in clinical settings. Mr. Patera has been retained in numerous expert witness and consulting engagements across the United States, involving cases in the biomedical engineering and medical device industries. His PhD in Biomedical Engineering from SUNY Downstate, along with his Master of Arts in Chemistry from Johns Hopkins 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 biosensing and diagnostic technologies.