An officer in charge of a particular force or institution:the camp commandant...
Among the last six commandants of the Army War College, for example, there have been a Rhodes Scholar, a published historian, a published military educator and two Ph.D.s who have also published.
He later served as commandant of the Regimental Officer Academy and the deputy commander of the U.S. Army Signal Command.
Marceau, wearing his uniform as a commandant in the French Army reserves, was the master of ceremonies.
Origin
Late 17th century: from French commandant, or Italian or Spanish commandante, all from late Latin commandare 'to command' (see command).