Civil Service, other government departments and service personnel from other nations. The Defence Centre of Training Support, originally headquartered at RAF Halton, forms part of the Defence Academy and is responsible for training military instructors and managers, and other aspects of defence training. Royal College Defence Studies The Royal College of Defence Studies The Royal College of Defence Studies (RCDS) instructs the most promising senior officers of the British Armed Forces. Directorate of Joint Warfare The role of the Director of Joint Warfare is to enable joint forces to operate effectively by defining, measuring and validating the joint force capabilities and formations required to meet current, unexpected and emerging threats. The directorate is responsible for the development and maintenance of air–land and air–maritime integration, and support to associated initiatives. Standing Joint Force Headquarters The Standing Joint Force Headquarters (SJFHQ) is a rapidly deployable component. When deployed, SJFHQ is responsible to Chief of Joint Operations through the Chief of Staff (Operations), otherwise the component reports to the Director of Joint Force Development. The Joint Force Headquarters and Joint Force Logistics Component Headquarters come under the command of the SJFHQ Commander and are based at Northwood Headquarters. Development, Concepts and Doctrine Centre The Development, Concepts and Doctrine Centre (DCDC) is the MOD’s think tank and is responsible for research work in support of joint concepts and doctrine, as well as and those relating to the Royal Navy, Royal Air Force and British Army. Joint Operations The Chief of Joint Operations (CJO) provides operational command of UK forces assigned to overseas joint and combined operations and provides politically aware military advice to the MOD in order to achieve UK's strategic objectives on operations. CJO includes the Permanent Joint Headquarters at Northwood Headquarters in Hertfordshire. He is supported by a Chief of Staff (Operations) and a civilian Chief of Staff (Policy and Finance). Joint Arms Control Implementation Group The Joint Arms Control Implementation Group (JACIG) is the UK’s arms control verification agency which is based at RAF Henlow in Bedfordshire. JACIG's work is focussed on implementing three main treaties: the Conventional Armed Forces in Europe (CFE) Treaty, the Vienna Document and the Open Skies Treaty. Joint Counter-Terrorism Training and Advisory Team The Joint Counter-Terrorism Training and Advisory Team (JCTTAT) is based at Risborough Barracks in Kent. Commanders A list of those who have served as Commander Joint Forces Command (retitled Commander of Strategic Command