Official

An official is someone who holds an office (function or mandate, regardless of whether it carries an actual working space with it) in an organization or government and participates in the exercise of authority (either their own or that of their superior or employer, public or legally private).

An officialis (plural officiales) was the official term (somewhat comparable to a modern civil servant) for any member of the officium (staff) of a high dignitary such as a governor.

In German, the related noun Offizialat was also used for an official bureau in a diocese that did much of its administration, comprising the vicariate-general, an adjoined secretariat, a registry office and a chancery.

An official competition is created or recognized as valid by the competent body, is agreed to or arranged by people in positions of authority.

A functionary is someone who carries out a particular role within an organization; this again is quite a close synonym for official, as a noun, but with connotations closer to bureaucrat.