RAF St Mawgan is currently home to Defence Survival Training Organisation (DSTO), which is a tri-service unit that teaches Survive, Evade, Resist, Extraction methods for the Armed Forces in support of operations and training. They also conduct trials and equipment development. The Royal Air Force maintains a small workshop on the station, enabling construction of components for the upgrading of aircraft across all three services. Accommodation on the base is often used by students of Agusta Westland's training facility at Newquay Airport.
St Mawgan is also the home of the Joint Maritime Facility, commissioned 18 August 1995, a command for undersea tracking operated by the Royal Navy and United States Navy. It was announced in early 2009 that the JMF would close in order to save the US Navy £6.5 million per year, losing 22 jobs in the process.