Or a nightclub worker who works around the clubbers, not behind the scenes, not the DJ, probably not a barman. Could be a bouncer.
Or perhaps an archaeologist currently involved with a dig. The others might be working on the walls or on a mosaic. This person is working on the floor.
Can you see why we ask for context so often on this forum? Just because all of the suggestions above have come from native speakers, it doesn't mean that if you hear the statement you quoted, it will necessarily mean any of the things we've suggested.