handyman; odd-job man
Refers to a person employed to do various manual tasks, often in a workplace or institution. The term can sound somewhat dated or formal; in modern casual contexts, 便利屋 or 用務員 may be more common.
He works as a handyman at the company.
用務員 is a more formal term for a janitor or custodian, typically in schools or public facilities, focusing on maintenance rather than varied manual tasks.
Compound of 雑 (ざつ, 'miscellaneous'), 役 (えき, 'duty'), and 夫 (ふ, 'man'). The word literally means 'miscellaneous-duty man'.