What kind of jobs are there in the fire service?

My boyfriend is currently works in the automotive sector, but he’s looking to get away from it. He is also a volunteer firefighter. He doesn’t want to be a paid firefighter, so I said I would look into career options, but all I’m finding is either EMT or firefighter. Anyone know any other careers for Fire service field? He would also like to work on fire trucks, but I’m not sure how to go about getting into that field. Any ideas?