a person who administers or organizes something

person who manages 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 person who starts and manages her or his own business

person who starts a business alone

a person who establishes a school etc

person who establishes an institution

a person who organizes and controls a business, a professional sports person etc

person who runs organization