• controller, keeper, minder, monitor, overseeing, overseer, person in charge, provost, super, superintendent, supervisor, surveyor, tender, trustee, warden
• charge, control, custody, observing, oversight, superintendence, supervision, surveillance, watch
• conservancy, inspectorate, inspectorship
• have in tow, to take in tow
• caretaker, hall porter, janitor, superintendent
• task-master, time-keeper