There are 100's of different jobs you can do. Anything from being a stage hand at a concert, to being a door guy, to being a career manager, a day-to-day manager, a booking agent, a talent buyer, a publicist, a promoter, so many jobs are out there. I'm currently a tour marketer, I didn't even know the job existed until I landed it. Just google, "Music Business Jobs/Careers". You'll find endless results.