Dennis O'Brien

ACTAR Number 2218

I am a full time nationally accredited traffic crash reconstruction specialist with 20 years of law enforcement experience and 27 years of collision investigation experience. I investigate all types of automobile, pedestrian and bicycle collisions for civil litigation and criminal cases. I conduct heavy vehicle event data preservation and analysis, along with passenger vehicle crash data retrieval services. I am also a photogrammetrist, 3D animator and modeler, and a collision impact simulator using the best software in the industry. First-hand on-scene experience gained during my career in law enforcement is a valuable asset that serves well in analyzing and interpreting evidence for use in my reconstruction analysis.