About Us

Doctors Occupational Testing Solutions (D.O.T.S.) helps businesses ensure safe, federally-compliant, drug and alcohol-free workplaces by providing flexible drug testing options and exceptional personal service for fast, professional and efficient results. D.O.T.S. was founded in 2000 by Dr. Marcus Vaughn, DC, QME, NRCME. Recognizing a need in the industry, Dr. Vaughn launched D.O.T.S. to offer professional drug testing services where safety administrators could work personally with experienced professionals to create custom programs that respect and protect each company’s time, money, and testing needs.

With experience in both the private and corporate sector, Dr. Vaughn recognizes the importance of a safe workplace environment when it comes to building a positive corporate culture and ensuring long-term profitability. He is a Qualified Medical Evaluator for the state of California for disability and impairment evaluations, certified through the NRCME to perform DOT physical examinations for drivers requiring CDL certification and physical examinations for Transit and School Bus drivers. He is also certified through DATIA for drug testing and alcohol testing protocols and is a certified Breath Alcohol Technician.

AT D.O.T.S., we understand that taking the wrong tests and wasting time by creating long periods of employee downtime can hurt a company’s bottom line. Since 2000, safety administrators from a wide variety of public and private companies have relied on us to keep costs down and profits up by ensuring a safe working environment that minimizes employee turnover, downtime, and liability issues. When it comes to drug testing solutions, D.O.T.S. exceptional programs, facilities, professionalism and personal touch have helped us to stand out from the crowd.