AETOS Security Management, a wholly owned subsidiary of Temasek Holdings, provides security solutions to a diverse clientele. Established in 2004, AETOS commenced operations following the strategic merger of the Auxiliary Police Forces of PSA Corporation Ltd, Singapore Technologies Kinetics Ltd (ST Kinetics) and Changi International Airport Services Pte Ltd (CIAS) . This brought together the country's security units in maritime, key installations protection and aviation under one roof. Organization structure: The team comprises retired officers from the police force, military and public service entities. AETOS' armed and unarmed officers can be seen securing Singapore's airports, ports, key and strategic installations, as well as various regional and local businesses and events. The AETOS Auxiliary Police Force has a command structure comprising a Commander and three Deputy Commanders. (a) Deputy Commander East Region - Commands a security force in charge of aviation security terminal operations at Singapore Changi Airport. (b) Deputy Commander West Region - Commands a security force in charge of maritime security operations across various installations on the western part of Singapore. (c) Deputy Commander SSU - Looks after Security Screening Unit and security functions at the terminal gate-hold rooms