J. J. Keller's Expert Witness Service brings credible, qualified and highly experienced transportation Consultants to serve as expert witnesses. On average, our Consultants have 15+ years of experience in the areas of DOT Safety and Compliance, Hazardous Materials Transportation, Driver Qualification File Management, Hours of Service Compliance, Drug and Alcohol Testing Administration Management and Cargo Securement. Our focused attention in the transportation industry has proven valuable to clients in litigation involving accidents, accusations of negligent hiring and supervision, labor relations, OSHA incidents and more.