office worker
officer
official">official office workerAn officer is a person who has a position of authority in the armed forces.
Officer is also used in the name of some people's jobs.
An official is a person who holds a position of authority in an organization, especially a government department or a trade union.
You do not use 'officer' or 'official' to refer to someone who works in an office. A person like this is called an office worker.