A / admĭnistrātor
noun

admĭnistrātor

gen. admĭnistrātōris · gender masculine · decl. 3rd
he that is near to aid; assist; in the care of a thing;
he that is near to aid, assist, etc., in the care of a thing; hence, a manager, conductor (cf. administro): (imperator est) administrator quidam belli gerendi, Cic. de Or. 1, 48, 210: rerum civitatis, Dig. 3, 4, 10 al.