J.S. Held is a global consulting firm that combines technical, scientific, financial, and strategic expertise to advise clients seeking to realize value and mitigate risk. Our professionals serve as trusted advisors to organizations facing high stakes matters demanding urgent attention, staunch integrity, proven experience, clear-cut analysis, and an understanding of both tangible and intangible assets. The firm provides a comprehensive suite of services, products, and data that enable clients to navigate complex, contentious, and often catastrophic situations.


More than 1,500 professionals serve organizations across six continents, including, 81% of the Global 200 Law Firms, 70% of the Forbes Top 20 Insurance Companies (85% of the NAIC top 50 Property & Casualty Insurers), and 65% of the Fortune 100 Companies.


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Arch T. Colwell Merit Award

SAE (Society of Automotive Engineers) : Member

Photogrammetry Committee for the Society of Automotive Engineers (SAE) : Former Chair

ASCE (American Society of Civil Engineers) : Member

SPIE (The International Society of Optical Engineering) : Member

ASPRS (American Society of Photogrammetry and Remote Sensing) : Member

AIARSC (Accident Investigation and Accident Reconstruction Standards Committee) : Team Member

Reconstruction of 3D Accident Sites Using USGS LiDAR, Aerial Images, and Photogrammetry

Determining Vehicle Steering and Braking from Yaw Mark Striations

A Method to Quantify Vehicle Dynamics and Deformation for Vehicle Rollover Tests Using Camera-Matching Video Analysis

Occupant Ejection Trajectories in Rollover Crashes: Full-Scale Testing and Real World Cases

The Influence of Vehicle-to-Ground Impact Conditions on Rollover Dynamics and Severity

Analysis of Vehicle-to-Ground Impacts During a Rollover with an Impulse-Momentum Impact Model

Image Analysis of Rollover Crash Tests Using Photogrammetry

A Video Tracking Photogrammetry Technique to Survey Roadways for Accident Reconstruction

Stephen Fenton joined J.S. Held in July of 2021 as part of J.S. Held's acquisition of Kineticorp. Mr. Fenton is a registered Professional Engineer in the State of Colorado and he is accredited as a Traffic Accident Reconstructionist through the Accreditation Commission for Traffic Accident Reconstruction (ACTAR). He holds a degree in Engineering from the Colorado School of Mines. Mr. Fenton investigates and reconstructs vehicular accidents and provides expert testimony in state and federal courts for both defendants and plaintiffs. He chaired the Photogrammetry Committee for the Society of Automotive Engineers (SAE) from 2001 to 2012 and participated as a team member in the Accident Investigation and Accident Reconstruction Standards Committee (AIARSC). As a part of the AIARSC, he participated in the following subcommittees: Investigation Techniques, Vehicle Road Friction, Reconstruction Analysis, Information Resources, and Motor Vehicle Fire Investigations Task Force.

Mr. Fenton has given presentations and lectures at a number of national and international technical conferences, including the Society of Automotive Engineers’ World Congress and Northeastern University’s Symposium on Criminal Justice. He conducts seminars for regional bar associations and engineering societies on photogrammetry and vehicular accident reconstruction. He has authored numerous technical articles in the areas of accident reconstruction, photogrammetry, and computer animation, which have been published in the SAE’s Technical Paper Series, Accident Reconstruction Journal, and the National Academy of Forensic Engineers. Mr. Fenton is the recipient of the prestigious 2006 Arch T. Colwell Merit Award. He has been awarded grants related to photogrammetric documentation and has been listed as a training specialist for close-range photogrammetry software. Mr. Fenton’s accident reconstruction expertise has been featured on such television programs as MSNBC’s “Why Cars Crash,” Discovery Channel’s “Discover Magazine – The Science Behind the Headlines” and NBC’s News Magazine “Dateline.”

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