The New York City Police Commissioner is the head of the governing body of the New York City Police Department. The commissioner is appointed by the mayor, and serves at the mayor's pleasure. The commissioner is responsible for the day-to-day operations of the department as well as the appointment of deputies including the Chief of Department and subordinate officers. Commissioners are civilian administrators, and they and their subordinate deputies are civilians under an oath of office, not sworn members of the force. This is a separate position from the Chief of Department, who is the senior sworn uniformed member of the force.