About Us

About Dr. Marcus Vaughn and D.O.T.S. Drug Testing

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.

Licensing / Training / Certifications

  • California State Board of Chiropractic Examiners: License DC17917 01/06/1987
  • Certified Industrial Disability Examiner (IDE), (CCA-CCF), 1992
  • Qualified Medical Examiner (QME), State of California – Primary QME Office Visalia, Satellite QME Offices Tulare, Hanford, Porterville, Fresno, Madera, Salinas)
  • Agreed Medical Examiner (AME)
  • National Registry of Certified Medical Examiners (NRCME #9257977245), 01/2013
  • Pre-Employment/Post-Offer Physical Examinations & Drug Screens
  • Radiography X-Ray Supervisor & Operator, State of California, 1986
  • Certified Instructor / Trainer-American Red Cross “Protect Your Back” program, 1992
  • Foundation for Chiropractic Education & Research (FCER)
  • U.S. DOT, Federally Mandated Drug & Breath Alcohol Testing Certifications
  • Certified Professional Collector Trainer (CPCT) Drug & Alcohol Testing Industry (DATIA)
  • Certified Breath Alcohol Technician (BAT) (Phoenix EBT)
  • FTA Drug & Alcohol Certification for “Reasonable Suspicion Supervisor Training” (49 CFR Part 655.43 and 655.14(b)(2) April 2009
  • Screening Test Technician (49CFR Part 40; Operation of ASD; ALCO 02)
  • DATIA Accredited Collection Facility 2003 to present

Professional Affiliations (Present and/or Previous)

  • American Chiropractic Association (ACA)
  • ACA Council on Occupational Health, Executive Committee – Secretary/Treasurer 2006-2009
  • ACA Council on Occupational Health, Executive Committee – President 2009-2011
  • California Chiropractic Association
  • Tulare/Kings Counties Chiropractic Association – President 1995
  • National Safety Council
  • California Trucking Association, Allied Member
  • Fresno Transportation Club Business Member
  • Wrangler Sports Chiropractic, Rodeo Team Physician
  • American Red Cross, “Protect Your Back” Program (Instructor/Trainer)
  • Visalia Luncheon Optimist (Board Member)
  • Palmer College of Chiropractic-West (Adjunct Faculty / Pre-Graduate Field Training Doctor)
  • Affiliate / Director AA Pre-Employment Center
  • San Joaquin Training Institute Advisory Board Member 2003
  • ACN Group Utilization Management Board Member 2002-2007
  • Society for Human Resources Management Member (SHRM of Tulare/Kings County)
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