There are no obvious "airplane jobs" that don't require an A&P or pilot certificate (and relevant experience).

With your airport experience, I'm sure you could find your way into FBO management. Also flight school managers/salesmen are not always CFI's or even pilots...the primary qualification is being able to work over young suckers (and their co-signers).

Managers at 135 ops and private 91 ops are essentially always pilots who are experienced enough to fly as a PIC/check airman for that op. Any position around airplanes which would not require specific training and experience would not pay much (line boy, scheduling clerk/receptionist).

Sim instructor? It's possible to break into that with relatively low time. Ground instructor? It's possible to find a job with only an AGI, which is easy to acquire.

Flight attendant? I wouldn't recommend that personally, but it's easy to get into.