administrator — An administrator is a person whose job involves helping to organize and supervise the way that an organization or institution functions.
boss — Your boss is the person in charge of the organization or department where you work.
chief — The chief of an organization is the person who is in charge of it.
manager — a person who has control or direction of an institution, business, etc., or of a part, division, or phase of it.
officer — a person who holds a position of rank or authority in the army, navy, air force, or any similar organization, especially one who holds a commission.
official — a person appointed or elected to an office or charged with certain duties.
overseer — a person who oversees; supervisor; manager: the overseer of a plantation.
supervisor — a person who supervises workers or the work done by others; superintendent.