In 1982, McNamara became the first Air Force member to directly command all three of Australia's armed services as Chief of the Defence Force Staff (CDFS), which had replaced the earlier senior position in the defence force, Chairman of the Chiefs of Staff Committee. He also became only the second RAAF officer to be raised to the rank of air chief marshal. As CDFS, McNamara had to work to repair strained relations between the Defence Department's military and civilian components. He sought to accomplish this through a restrained management style and respect for the department's public servants. At the same time, he maintained the need for military and civilian personnel to be easily distinguishable, and reversed a trend for armed force personnel to wear suits "in the office" and uniforms only "on parade", which was the preference of Secretary of the Department of Defence Arthur Tange. The military and public service wings of the department still clashed over the question of enlarging the CDFS's role to achieve more coherent defence planning. Shortly after McNamara completed his term as CDFS in 1984, the position was redesignated Chief of the Defence Force (CDF), to more clearly reflect its authority over the Australian armed services.