What's a correct expression for professions in which you do a lot of sitting?

I'm a native Dutch speaker writing a short English piece on sitting professions, sitting positions and whether these positions are back friendly. In Dutch we would just write these words together, but this seems wrong in English. What are proper terms for sitting profession, sitting position and back friendly?

A profession in which one sits for long periods is a sedentary profession, and a seated position might also be described as sedentary.

A back-friendly posture might be called ergonomic, but that sense is more of a marketing buzzword than a "proper" usage. I might just stick with back-friendly for that.

I would say desk job indicates a job requiring sitting. In terms of sitting position I would say do not slouch but sit up straight. And in terms of back-friendly I would recommend good posture.

Sedentary would describe a very inactive occupation. However, it doesn't specifically mean sitting.

Posture might work for sitting position... Seated posture to be more specific, but, again, it doesn't directly specifically mean sitting.