Georges St Pierre famously worked as a garbageman:

“A lot of the jobs I used to do were terrible. I used to work security in a nightclub, in a hip-hop night club. It was a lot of [fighting], a terrible job. It was a depressing job. I used to work in a grocery store—it was bad. ‘Garbageman! To pay my university [bills], I worked as a garbage man for six months. That was not so bad, actually. That was actually one of my most fun jobs.”