About the provider

Doctors Occupational Testing Solutions (D.O.T.S.) ensures safe, federally-compliant, drug and alcohol-free workplaces with flexible testing options and exceptional personal service. Founded in 2000 by Dr. Marcus Vaughn, DC, QME, NRCME, D.O.T.S. offers professional drug testing services tailored to each company’s needs.
Dr. Vaughn, with experience in both private and corporate sectors, emphasizes the importance of a safe workplace for positive corporate culture and profitability. He is a Qualified Medical Evaluator in California, certified to perform DOT physical exams for CDL, Transit, and School Bus drivers, and is certified through DATIA for drug and alcohol testing protocols.