ad·min·is·tra·tor
 /ədˈmınəˌstreıtɚ/  noun  ,  pl   -tors [  count  ]
  : a person who administers something: such as
   a : a person whose job is to manage a company, school, or other organization
   a hospital administrator
   b : a person who controls the use of something (such as property or money)
   Her eldest son will act as the administrator of the estate.