Designated employer representative (DER) is an individual identified by the employer as able to receive communications and test results from service agents and who is authorized to take immediate actions to remove employees from safety-sensitive duties and to make required decisions in the testing and evaluation processes. The individual must be an employee of the company. Service agents cannot serve as DERs.
49 CFR § 382.107
Words or phrases used in this part are defined in 386.2 and 390.5 of this subchapter, and 40.3 of this title, except as provided in this section -