For the record, the ones we definitely know about are (thanks to the wiki):
- Macrodata Refinement
- Optics and Design
- Wellness Center
- Mammalians Nurturable
- Choreography and Merriment
Possibly also departments:
- Distribution Supply
- Disposal and Reclamation
Yeah, I’d go with O&D. You’d see lots of interesting objects (far more than employees from other departments would ever see), and presumably also do some design work - it won’t ever get boring! Unlike staring at numbers all day.