The Chairman Joint Chiefs of Staff Committee (CJCSC) was Pakistan's highest-ranking and senior most uniformed military officer, from 1976 to 2025, typically at four-star rank. The post was abolished under the 27th Constitutional Amendment in November 2025 and its functions were transferred to the newly created Chief of Defence Forces. The chairman served as the senior uniformed adviser to the Prime Minister of Pakistan, the President of Pakistan, and the National Security Council of Pakistan. The office directed inter-service coordination, joint strategic planning, capability development, and oversight of tri-service institutions including the Strategic Plans Division. Operational command remained with the individual service chiefs. The chairman led the meetings and coordinated the combined efforts of the Joint Chiefs of Staff Committee (JCSC), comprising the chairman, the chief of the Army Staff, the chief of the Air Staff, the chief of the Naval Staff, the commandant of the marines, the director general of the Coast Guards and the Strategic Plans Division, and the commanders of the service branches in the Civil Armed Forces and the National Guard.
Even as the principal staff officer (PSO), the chairman did not have any authority over the command of the combatant forces. The individual service chiefs were solely responsible for the coordination and logistics of the armed and combatant forces. Due to this constraint, the chiefs of the army, navy and air force remained in effective command and control of their respective commands.