Prime Minister of Australia prime minister, otherwise William McMahon63. Robert Menzies was the oldest person to ever be prime minister, leaving office at 71 years old. The longest-serving Prime Minister was Sir Robert Menzies, who served in office twice: from 26 April 1939 to 28 August 1941, and again from 19 December 1949 to 26 January 1966. In total Robert Menzies spent 18 years, 5 months and 12 days in office. He served under the United Australia Party and the Liberal Party respectively. The shortest-serving Prime Minister was Frank Forde, who was appointed to the position on 6 July 1945 after the death of
Department of the Prime Minister and Cabinet (Australia) Australian operational cyber security agencies, and the implementation of the Australian Government Cyber Security Strategy. The Special Adviser also ensures effective partnerships between Commonwealth, state and territory governments, the private sector, non-governmental organisations, the research community and the international partners. The Special Advisor also works closely with the Australian Cyber Security Centre colocated within the Australian Signals Directorate and the Australian Ambassador for Cyber Issues of the Department of Foreign Affairs and Trade. The Commonwealth Counter-Terrorism Coordinator and the Centre for Counter-Terrorism Coordination provides strategic advice and support to the Prime Minister and the Minister Assisting the Prime Minister for