a person who administers or organizes something

person who manages organization

a leader

chief of vehicle, effort

an officer in charge of a military operation

leader of military or other organization

a person who manages or controls (especially one of a group called 'the Board of Directors") the affairs of a business company

manager

a workman in authority over others

overseer

a person who governs a province or (in US) a State; an apparatus that regulates the speed of ship's engine revolutions

person administrating government