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.
(..) - He's dying. his life is my blood, Spider-Man's blood. As far as I know, if I gave it to him, it could kill him. I'm saying worse. This is the maintenance closet, Gwen. This is the most cliche hiding place you could have chosen. I'm...sorry. This is the stupidest hiding place. (..)2014 The Amazing Spider-Man 2