A somewhat informal or colloquial term for someone who does office work, often with a nuance of being a paper-pusher or desk worker.
He's just an office worker, so he doesn't know about sales.
This is technical jargon that's difficult for a clerk.
Refers to a salaried employee, typically a white-collar worker, but broader than just office work.
Compound of 事務 (office work) and 屋 (person, often with a slightly informal or occupational nuance).