The title of Prefect is held by military governors of the Dlarit Special Operations Group. Prefects are placed in charge of assets not controlled by one of the corporation's main governors.
For example, though there are governors of Aeotheran and Tarthos, Kangaras is controlled directly by a prefect of D-SOG as military governor. Prefects also oversee security of any particuarly important installations on the main worlds such as Sadow Palace.
Amphor ~Currently Darth Vexatus
Inos
Gamuslag
Kangaras ~Currently Malisane
Sadow Palace
Sepros
Ulatyu