Dahmer committed his first murder shortly after graduating high school and before going to college. Dahmer, who abused alcohol starting at a young age, was only at Ohio State University for a single semester before dropping out. At his father’s urging, Dahmer then joined the military and trained as a medic. He was deployed to West Germany in 1979, but his performance deteriorated as a result of alcohol abuse, and he was eventually granted an honorable discharge in 1981.

Source: https://www.distractify.com/p/what-did-jeffrey-dahmer-do-for-a-living