DOT Certified Testing Services is a company that specializes in providing drug and alcohol testing services in compliance with regulations set by the U.S. Department of Transportation (DOT). These regulations are crucial for ensuring safety in transportation industries such as aviation, trucking, railroads, and mass transit. Overall, DOT Certified Testing Services (DCTS) play a critical role in ensuring safety and regulatory compliance within the transportation industry by helping employers maintain drug-free workplaces and uphold stringent DOT standards (49 CFR Part 40)!