DER Overview: What Every Designated Employer Representative Needs to Know

The Designated Employer Representative (DER) is responsible for managing critical aspects of a DOT drug and alcohol testing program. This includes oversight of random testing, reasonable suspicion, and post-accident decisions; coordination with Medical Review Officers (MROs); recordkeeping; and audit readiness.

This overview provides a practical, plain-language breakdown of DER responsibilities under 49 CFR Part 40, helping employers understand what is required, which decisions fall to the DER, and how to maintain year-round compliance.

Whether you are newly assigned to the DER role or need a refresher, this guide is designed to help you act confidently and avoid compliance gaps.

Need Help Navigating Your DER Responsibilities? 

If you have questions about your program or want to ensure you’re fully compliant, we’re here to help.

 Email: michelle@procomtesting.com
 Phone: 303-325-3010

Or connect directly to get guidance on setting up or managing your DOT drug and alcohol testing program.