Nuclear materials courier
Nuclear materials courier means an employee of the Department of Energy, the duties of whose position are primarily to transport, and provide armed escort and protection during transit of, nuclear weapons, nuclear weapon components, strategic quantities of special nuclear materials or other materials related to national security, including an employee engaged in this activity who is transferred directly to a supervisory or administrative position within the same Department of Energy organization, after performing this activity for at least 3 years. (See 5 U.S.C. 8331.)