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.
(..) - Why? Well, his name's all over these permits I just pulled to, uh, map the tunnels under Gotham. That's MTA maintenance, uh, sewer construction, couple of other things. Where did you get to with the tunnel searches? Remind me to tell detail to keep hotheads out. (..)2012 The Dark Knight Rises