The Imperium makes extensive use of menial labour - don't think modern Western society, more like current Third World or 1300's Europe. Is he supposed to be rich or poor? He could be a Groxhand, or a menial harvester. Wealthier, he could be a bailiff, or a local lawman of some sort. At the top, he could be the child of a local lord, which would put him in the leisured or military class. Course, there would bars and restaurants of various kinds, so there would be a service industry. What you probably wouldn't get is something like Galaxybucks - the Galaxy's Favourite Provider of Recaff, or insurance companies, financial services, anything like that - the Imperium is not a capitalistic society, and so lacks this idea of investment or economic expansion of a brand.
oh, and - Welcome to the Conclave!