Source : Webster's Revised Unabridged Dictionary (1913)

Overseer \O`ver*seer"\, n.
   One who oversees; a superintendent; a supervisor; as, an
   overseer of a mill; specifically, one or certain public
   officers; as, an overseer of the poor; an overseer of
   highways.

Source : WordNet®

overseer
     n : a person who directs and manages an organization [syn: {superintendent}]