Deputy Chief of the General Staff (DCGS) is the title of the deputy to the Chief of the General Staff, the professional head of the British Army. From 1942 until 1968 the Deputy Chief was the third-ranking member of the General Staff, subordinate the Chief and Vice Chief. As of September 2015, the role of Deputy CGS is to be "responsible for representing the Army Top Level Budget (TLB) within Head Office and outwards to relevant TLBs and dependencies, provides oversight of the Army Operating Model and provides overall personnel policy direction as the Principal Personnel Officer (PPO)."

The Chief of the General Staff (CGS) has been the title of the professional head of the British Army since 1964. The CGS is a member of both the Chiefs of Staff Committee and the Army Board; he is also the Chair of the Executive Committee of the Army Board. Prior to 1964, the title was Chief of the Imperial General Staff (CIGS). Since 1959, the post has been immediately subordinate to the Chief of the Defence Staff, the post held by the professional head of the British Armed Forces.