Cleans floors and rooms. including dust mopping, damp mopping, sweeping, vacuuming, dusting, picking up larger objects off the floor, and spot cleaning glass and windows. ... Vacuums, empties trash, andreplaces liners. Sets up, stocks, and maintains cleaning equipment and supplies. So just call him a cleaner. Janitor, caretaker, or custodian could also be used, but those jobs tend to be broader in scope than just cleaning: maintenance and other aspects of looking after a building can also be included.
