Sir Graeme Thomson 13 November 1925 -17 June 1931
Sir Donald Charles Cameron 17 June 1931 - 1 November 1935
Sir Bernard Henry Bourdillon 1 November 1935 -1 July 1940
Sir John Evelyn Shuckburgh 1 July 1940- 1942
Sir Alan Cuthbert Maxwell Burns 1942 -18 December 1943
Sir Arthur Richards 18 December 1943- 5 February 1948
Sir John Stuart Macpherson 5 February 1948- 1 October 1954