It was based at Templer Barracks in Ashford, Kent, United Kingdom alongside the Headquarters and Depot of the British Army's Intelligence Corps and the Joint Service Interrogation Wing.
In 1997, following the closure of Templer Barracks as a result of work on the Channel Tunnel Rail Link, the DISS and other elements were relocated to the Defence Intelligence and Security Centre, at Chicksands near Shefford, Bedfordshire.
The Barracks have now been demolished with the exception of Repton Manor, a Grade II listed building.
The SSI provided all trade training for regular and Reserve soldiers and junior officers of the Intelligence Corps, preparing personnel for roles in the land warfare environment.
Other courses available for Royal Navy, Royal Air Force, civilian and international students encompassed Signals Intelligence, Human Intelligence, Conduct after Capture, Analysis, Counter-intelligence and Security amongst others.