The Military Security Department's (MSD) core business is in Counter Intelligence and internal security for MINDEF/SAF. We are an independent body that reports directly to the Permanent Secretary of Defence, PS(D).

MSD was formed in 1975 to counter the threats of espionage, subversion and sabotage against MINDEF/SAF. It began with two main entities, namely the Counter Intelligence Branch (CIB) and Field Security Branch (FSB).

Over the years, MSD has continued to evolve and our roles have expanded in tandem with the changing security environment. Today, our roles also include counter terrorism and cyber security.