a 'maintenance' worker [=a worker whose job is to keep property or equipment in good condition]
The building has suffered from years of poor 'maintenance'.
She works in the company's 'maintenance' department.
(..) No. You and Ash... take the main air lock. Parker, Lambert, you cover up that maintenance opening, please. - I'm at the firstjunction. - Dallas, I'm right here. - Parker? - Yeah? - Lambert? (..)1979 Alien