To become an administrator means to be appointed or elected into a position of authority, typically in a business, organization, or government institution. Full definition
Political institutions have become administrators of developments which they neither have planned nor are able to structure, but must somehow justify. (newscientist.com)
She recently became an administrator at a charter school. (paschoolfunding.org)
Another situation driving teachers from the classroom is the relatively flat career trajectory of the teaching profession... for individuals who are not interested in becoming administrators. (learningpolicyinstitute.org)