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.
(..) Circulating area, right? Ay, sir. There's a atmospheric regulator core. Lieutenant, contact Yorktown... ...make sure they shut it down before it finds Krall. How we access the core? Well, there is a maintenance tower at the stations gravitational nexus. That's the only way. Scotty, Classy, with me. (..)2016 Star Trek Beyond