administerer
/ədˈmɪnɪst(ə)rə/noun
A person who administers something. In later use chiefly with of.
Origin
Late Middle English. Partly (originally) from Anglo-Norman administrere, administrour, etc., Anglo-Norman and Middle French administreur administrator, (in law also) executor, and partly from administer + -er. Compare Old Occitan aministraire and the Romance forms cited at administrator.