My few ideas would be (I'm sorry if these are already being done or have been said):
-Criminal hacking: being that there is an in game style Internet
-taxi driver: for the players who do not have fast means of transportation
-Doctor- being a prescription dealing doctor would help benefit the criminal career if you don't want to be an honest doc, or you can chose to just save lives as a surgeon
-artist/photographer: you can design clothes and paint right? Why not get different challenges to try and grab a camera and find a certain person, event or item. Even a landscape
-Science: study technology that could be used by players (ex. flying car?) or maybe have conservation officers for people who like the Forrest. Maybe even marine life.
-Animal lovers?: maybe zoo keepers or trainers, hell idk, maybe even a dog catcher or again back to the conservation officer or DNR
Pot grower: find a secluded area or bribe a farmer to try to get easy cash selling drugs you made.
these are ideas, some games don't have anything like some of the mentioned. I know some would be difficult and some probably not possible but these are ideas. I saw one video on this game and it hooked me. I see the potential, and so does a rapidly growing supportive community.