supervisor

noun | \ ˈsü-pər-ˌvī-zər \ | su·per·vi·sor

1. : one that directs or oversees a person, group, department, organization, or operation; specifically : the popularly elected chief administrative official of a township or other subdivision in some states of the U.S. : the popularly elected chief administrative official of a township or other subdivision in some states of the U.S.