Sir Frank Keith Officer, OBE, MC (2 October 1889 – 21 June 1969) was an Australian public servant and diplomat, best known for his postings in ambassadorial positions around the world.

[2] Between 1914 and 1918, Officer served with the First Australian Imperial Force in Egypt, Gallipoli, France and Belgium.

[5] In 1940, Officer was appointed counsellor to the Australian legation in Japan,[6] second in command to Sir John Latham.

[12][13] He was recalled from Nanjing in November 1949 to consult with the Department of External Affairs on the recognition by the United Kingdom of the Communist Government in China.

[15] His retirement prompted External Affairs Minister Richard Casey to write a letter touching on Officer's work, in which he said: "you can properly regard yourself not only as one of the founders of the Australian Foreign Service but as a model which men of succeeding generations can seek to emulate.