Every DOT regulated employer needs a Designated Employer Representative, or DER. Collectors, labs, MROs and TPAs all play important roles, but the DER is the person who acts on the employer's behalf when it counts.
What the DER does
Under Part 40, the DER is an employee authorized by the employer to take immediate action to remove employees from safety sensitive duties and to make required decisions in the testing and evaluation processes. The DER also receives test results and other communications for the employer. Part 40 is clear that service agents, such as a C/TPA, cannot act as the DER.
In practice, the role includes:
• Removing an employee from safety sensitive functions after a verified positive, refusal or other violation
• Responding to collectors in real time when a collection problem comes up
• Directing directly observed collections when Part 40 requires them
• Coordinating with the MRO, SAP and the employer's C/TPA
• Keeping policy, records and standing orders current
The 2026 rule adds to the DER's plate
DOT's June 2026 rule asks collectors to check for an employer standing order before calling the DER in certain observed collection situations, and spells out what the DER must do when a same sex observer isn't available. A clear, written standing order saves time, reduces errors and protects the employer. And when oral fluid testing becomes available, DERs will be at the center of deciding whether and how to use it.
Why training matters
The employer is responsible for compliance, and the DER's decisions are the employer's decisions. A DER who doesn't fully understand refusals, observed collections or removal from duty can turn a routine test into an audit finding or a legal problem.
How Stratellis Training can help
Our DER Training covers the DER's responsibilities under federal drug and alcohol testing rules, with an FMCSA addendum for motor carrier employers. We also offer Consortium/Third Party Administrator (C/TPA) Training for organizations that manage programs for other employers.