An administrator (one who administers affairs).
A systems administrator (one who maintains a computer system or network).
A user of a discussion forum, website, etc. with privileges allowing them to control or restrict the activity of other users.
Administration, or administrative work.
An administration (a body that administers; the executive part of government).
To serve as an administrator for or of.
A governing official in various institutions
An official charged with supervisory duties or with the enforcement of specific laws or regulations; such as a game warden or air-raid warden
A variety of pear.
A chief administrative officer of a prison.
To carry out the duties of a warden.