Find the Right Expert for Every Case

Residential Combination Inspector

Aaron D. Miller, RCI, ACI is a Residential Construction and Inspection expert specializing in residential construction defects and building code compliance. With a career spanning general contracting, residential inspection, and code enforcement, he brings a comprehensive understanding of construction standards and practices to litigation work. His work centers on investigating construction defects, assessing code compliance, and evaluating whether industry standards have been met. Mr. Miller has been retained in numerous expert witness and consulting engagements across Texas, involving residential construction defect cases and premises liability disputes. His Associate of Arts Degree in a relevant field, along with certifications such as Certified Residential Combination Inspector and Certified Master Inspector, 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 residential construction and inspection issues.

Expert Witness

John E. Skidmore, P.E. is a civil engineering expert specializing in forensic analysis related to drainage, flooding, and structural damage. With a career spanning land planning, surveying, hydrology, and geotechnical engineering, he brings a multidisciplinary perspective to litigation work. His work centers on investigating water intrusion causes, assessing structural impacts from external forces, and evaluating whether construction defects contributed to property damage. Mr. Skidmore has been retained in numerous expert witness and consulting engagements across the United States, involving cases such as drainage disputes, water intrusion claims, and structural damage assessments. His Bachelor of Science in Civil Engineering from Southern Methodist University, along with certifications such as the NCEES Council Record and FAA Remote Pilot 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 hydrology, structural integrity, and environmental impacts.

Director, International Firearm Specialist Academy, Inc.

Daniel G. O’Kelly is a firearm identification and ballistics analysis expert specializing in shooting reconstruction and gunshot residue analysis. With a career encompassing federal firearm regulations, compliance auditing, and expert witness testimony, he brings a comprehensive framework to litigation involving firearm-related incidents. His work centers on investigating use of force, assessing self-defense claims, and evaluating compliance with the Gun Control Act. Mr. O’Kelly has been retained in numerous expert witness and consulting engagements across the United States, involving cases of wrongful death, patent infringement, and NFA violations. His Bachelor’s degree in Criminal Justice from Indiana University, along with affiliations with the National Shooting Sports Foundation and the International Ammunition Association, 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 firearm design and classification.

President & Principal Engineer

Gregg S. Perkin, PE is a mechanical engineering expert specializing in mechanical equipment design and safety systems. With extensive experience across domestic and international projects, he brings a multifaceted perspective to litigation work involving complex mechanical systems. His work centers on investigating mechanical failures, assessing safety compliance, and evaluating whether industry standards were met in equipment design and operation. Mr. Perkin has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to oil and gas drilling equipment, mechanical systems design, and accident reconstruction. His Bachelor of Science in Mechanical Engineering from California State University at Long Beach, along with his registration as a Professional Engineer in thirteen states, 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 mechanical equipment and safety systems.

Highly Experienced Expert, Summa Cum Laude

Thomas Collier, Jr is a construction and premises liability expert specializing in large commercial and multi-residential construction disputes and serious bodily injury claims. With a career spanning general contracting, development, and consulting, he brings a comprehensive understanding of construction practices and liability issues to his litigation work. His work centers on investigating construction defects, assessing premises liability, and evaluating whether industry standards have been met. Mr. Collier has been retained in numerous expert witness and consulting engagements across the Southeastern United States, involving commercial defects, personal injury claims, and multifamily construction disputes. His BA in Economics and English from the University of North Carolina at Chapel Hill, along with his Licensed Contractor certification in Georgia, 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 defects and premises liability.

Loss Control, Risk Management & Safety Consultant

Mark Clinton, MBA, ARM is a Loss Control and Risk Management expert specializing in premises liability and amusement safety. With a career encompassing diverse sectors such as construction, insurance, and safety consulting, he brings a multifaceted perspective to litigation work. His work centers on investigating premises liability incidents, assessing compliance with safety standards, and evaluating whether risk management protocols were followed. Mr. Clinton has been retained in numerous expert witness and consulting engagements nationwide, involving cases related to amusement parks, construction safety, and insurance loss control. His Masters of Business Administration in Finance and Insurance, along with certifications such as OSHA 500 and OSHA 501 Outreach Trainer, 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 safety compliance and risk management practices.

Owner & Manager

Larry W. Busby is an accident reconstruction and land surveying expert specializing in accident investigation and reconstruction. With a career spanning private investigation, land surveying, and accident reconstruction, he brings a multidisciplinary perspective to litigation work. His work centers on investigating accident causation, assessing scene mapping accuracy, and evaluating whether industry standards were met. Mr. Busby has been retained in numerous expert witness and consulting engagements across Texas, New Mexico, Colorado, and Oklahoma, involving automotive, pedestrian, commercial vehicle, and land surveying cases. His Bachelor’s Degree in Criminal Justice, along with certifications such as the Accreditation Commission for Accident Reconstruction (ACTAR) and Certified Federal Surveyor (CFedS), 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 accident reconstruction and land surveying.

Supervising Civil Engineer – Transportation / Signals / ITS

Jocelyn Mamchur, PE is a transportation engineering expert specializing in traffic signal systems and Intelligent Transportation Systems (ITS) litigation. With extensive experience in municipal engineering and public agency standards, she brings a nuanced understanding of design compliance and safety analysis to her litigation work. Her work centers on investigating traffic signal failures, assessing compliance with engineering standards, and evaluating whether deviations from the Manual on Uniform Traffic Control Devices (MUTCD) have occurred. Ms. Mamchur has been retained in numerous expert witness and consulting engagements across the Pacific Northwest, involving municipal liability and pedestrian safety cases. Her Bachelor of Science in Engineering from the University of Manitoba, along with her Professional Engineer (PE) license in Washington State, reinforce her ability to deliver objective, defensible analyses. She is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of standard of care in disputes involving traffic control devices and roadway lighting.

Registered Professional Engineer

Harold E. von Dran Jr., PE is an Environmental Engineering expert specializing in environmental litigation and regulatory compliance. With a career spanning environmental program management, construction defect analysis, and regulatory negotiations, he brings a strategic framework to litigation work. His work centers on investigating environmental contamination, assessing regulatory compliance, and evaluating infrastructure design failures. Mr. von Dran has been retained in numerous expert witness and consulting engagements across Texas, Arkansas, Louisiana, and beyond, involving environmental contamination cases, construction defects, and regulatory compliance disputes. His MS in Environmental Science, along with his Certified Energy Manager 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 environmental impact assessments and facility design compliance.

Insurance Expert & Consultant

Wayne Citron is an insurance expert specializing in forensic reconstruction of insurance transactions. With a career spanning insurance sales, compliance, and education, he brings a comprehensive framework to litigation work involving policy interpretation and regulatory compliance. His work centers on investigating insurance bad faith, assessing policy compliance, and evaluating whether industry standards were met. Mr. Citron has been retained in numerous expert witness and consulting engagements across the United States, involving insurance bad faith, health and disability insurance, life and annuities, and property/casualty insurance. His education in business practices from the College of Insurance and New York City Community College, along with licenses from the National Association of Securities Dealers and Financial Industry Regulatory Authority, 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 insurance agents and brokers.

Mechanical Engineering, Accident Reconstruction, Biomechanics and Safety Expert

Kristopher J Seluga, Licensed Professional Engineer is a Mechanical Engineering and Accident Reconstruction expert specializing in biomechanics and safety analysis. With a career spanning accident reconstruction, product liability, and safety engineering, he brings a multidisciplinary approach to his litigation work. His work centers on investigating motor vehicle dynamics, assessing product design and safety, and evaluating whether safety standards have been met. Mr. Seluga has been retained in numerous expert witness and consulting engagements across Connecticut and New York, involving motor vehicle accidents, product liability, and premises liability cases. His M.S. in Mechanical Engineering from M.I.T., along with his OSHA 10-hour Construction Safety and Health 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 accident reconstruction and safety engineering.

Crash Reconstructionist-Forensic Mapper, CDR Analyst-Technician

Daniel Holmes, A.C.T.A.R. #2455 is a crash reconstruction expert specializing in forensic mapping and CDR analysis. With a career spanning accident investigation, forensic mapping, and crash data retrieval, he brings a robust analytical framework to litigation work. His work centers on investigating crash dynamics, assessing vehicle and scene data, and evaluating whether industry standards were met. Mr. Holmes has been retained in numerous expert witness and consulting engagements across Minnesota, involving cases related to vehicle collisions, pedestrian accidents, and commercial vehicle incidents. His Bachelor Degree of Science in Law Enforcement, along with certifications such as Full Accreditation - Traffic Accident Reconstructionist and MN Licensed Peace Officer, 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 crash reconstruction and forensic mapping.

CEO and Lead Forensic Expert

Jason Fries, Advanced Force Science Specialist, Force Science Certificate, Private Pilot Certificate is a forensic reconstruction expert specializing in accident reconstruction and forensic animation. With a career spanning the development of laser-based photogrammetry and the introduction of 3D reconstructions into courtrooms, he brings a pioneering perspective to litigation work. His work centers on investigating officer-involved shootings, assessing nighttime visibility, and evaluating whether forensic animations meet admissibility standards. Mr. Fries has been retained in numerous expert witness and consulting engagements across the United States, involving civil and criminal cases, including officer-involved shootings and accident reconstructions. His B.S. in Biology (Focus in Physics and Chemistry), along with certifications such as Advanced Force Science Specialist and Force Science Certificate, 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 forensic reconstructions and human factors.

Bicycle Expert

J Lucas Elrath, Bicycle Expert is a bicycle accident reconstruction expert specializing in commercial and personal injury litigation involving bicycles and wheeled vehicles. With a career encompassing bicycle design, manufacturing, and maintenance, he brings a comprehensive understanding of how these elements impact rider safety and accident causation. His work centers on investigating crash dynamics, assessing design and manufacturing defects, and evaluating whether maintenance practices contributed to accidents. Mr. Elrath has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to bicycle design, manufacturing defects, and crash reconstruction. His B.S. in Electrical Engineering, along with certifications such as E-Bike Fundamentals Certification and Certified Bicycle Technician, 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 bicycle accidents and related safety issues.

President

Ken Karston, S.E., P.E. is a structural engineering expert specializing in construction defects and building envelope investigations for water infiltration. With a career spanning design, forensic investigations, and construction administration, he brings a comprehensive framework to litigation work involving structural integrity and compliance. His work centers on investigating construction defects, assessing building conditions, and evaluating whether structural designs meet industry standards. Mr. Karston has been retained in numerous expert witness and consulting engagements across the United States, involving residential, commercial, and historic building cases. His Bachelor of Science in Civil Engineering from the University of Illinois at Chicago, along with his certifications as a Registered Structural Engineer in Illinois, Nevada, and Utah, and as a Registered Professional Engineer in multiple states, 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 engineering and construction practices.

Expert Witness

Barry Taheri is a construction defects expert specializing in forensic investigations and exterior envelope failure analysis. With a career spanning forensics, weatherization, and field testing, he brings a comprehensive understanding of building science and waterproofing systems to his litigation work. His work centers on investigating construction defects, assessing weatherization failures, and evaluating whether industry standards were met in building enclosure systems. Mr. Taheri has been retained in numerous expert witness and consulting engagements across California, involving construction defect cases in residential, commercial, and retail properties. His education from the USC School of Architecture and Engineering, along with certifications such as the DuPont Envelope certification (DWSRC 1082) and California Contractor’s License (B 904491), 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 waterproofing systems and construction engineering.

Managing Director

Casey K. Hemmatyar, PE, SE is a forensic engineering expert specializing in construction litigation support. With a career spanning structural failure analysis, seismic hazard evaluation, and building code development, he brings a multidisciplinary perspective to his litigation work. His work centers on investigating structural failures, assessing construction defects, and evaluating whether seismic retrofits meet industry standards. Mr. Hemmatyar has been retained in numerous expert witness and consulting engagements across the United States and Canada, involving construction defects, structural failure investigations, and seismic retrofitting cases. His BS in Structural Engineering from the University of Science & Technology, along with his SE and PE licenses in multiple states, 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 construction practices.

P.E., R.L.S.

James D. Wamble, P.E., R.L.S. is a civil engineering and land surveying expert specializing in land use planning and boundary dispute analysis. With a career spanning civil engineering design, land planning, and construction project management, he brings a comprehensive framework to litigation work involving complex land development issues. His work centers on investigating land use compliance, assessing boundary delineations, and evaluating whether engineering standards have been met. Mr. Wamble has been retained in numerous expert witness and consulting engagements across Tennessee, involving residential, commercial, and mixed-use development cases. His Bachelor of Science Degree in Civil Engineering, along with his certifications as a Professional Engineer and Registered Land Surveyor, 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 development and civil engineering practices.