Minister for Defence (Australia) in the context of Deputy Prime Minister of Australia

Joseph Benedict Chifley (/ˈtʃɪfli/; 22 September 1885 – 13 June 1951) was an Australian politician who served as the 16th prime minister of Australia from 1945 to 1949. He held office as the leader of the Australian Labor Party (ALP), and was notable for defining Australia's post-war reconstruction efforts, enacting social and immigration reform and advancing the nationalisation of essential industries.

Chifley was born in Bathurst, New South Wales, and joined the New South Wales Government Railways after leaving school, eventually qualifying as an engine driver. Before entering politics, he was an organiser for the Federated Union of Locomotive Employees, and was also a director of The National Advocate. After several previous unsuccessful candidacies, Chifley was elected to parliament in the 1928 federal election. In 1931, he was appointed Minister for Defence in the government of James Scullin. He served in cabinet for less than a year before losing his seat at the 1931 federal election, which saw the government suffer an electoral wipeout.

The Royal Australian Navy (RAN) is the naval branch of the Australian Defence Force (ADF). The professional head of the RAN is Chief of Navy (CN) Vice Admiral Mark Hammond. The Chief of Navy is also jointly responsible to the Minister for Defence (MINDEF) and the Chief of the Defence Force (CDF). The Department of Defence, which is a part of the Australian Public Service, supports the ADF, and ergo, the Royal Australian Navy.

The navy was formed in 1901 as the Commonwealth Naval Forces (CNF) through the amalgamation of the colonial navies of Australia following the federation of Australia. Although it was originally intended for local defence, it became increasingly responsible for regional defence as the British Empire started to diminish its influence in the South Pacific.

The Royal Australian Air Force (RAAF) is the principal aerial warfare force of Australia, a part of the Australian Defence Force (ADF) along with the Royal Australian Navy and the Australian Army. Constitutionally the governor-general of Australia is the de jure commander-in-chief of the Australian Defence Force. The Royal Australian Air Force is commanded by the Chief of Air Force (CAF), who is subordinate to the Chief of the Defence Force (CDF). The CAF is also directly responsible to the Minister for Defence, with the Department of Defence administering the ADF and the Air Force.

Formed in March 1921, as the Australian Air Force, through the separation of the Australian Air Corps from the Army in January 1920, which in turn amalgamated the separate aerial services of both the Army and Navy. It directly continues the traditions of the Australian Flying Corps (AFC), the aviation corps of the Army that fought in the First World War and that was formed on 22 October 1912.

John Malcolm Fraser (/ˈfreɪzər/; 21 May 1930 – 20 March 2015) was an Australian farmer and politician who was the 22nd prime minister of Australia, serving from 1975 to 1983. He held office as the leader of the Liberal Party of Australia, and is the fourth longest-serving prime minister in Australian history.

Fraser was raised on his father's sheep stations, and after studying at Magdalen College, Oxford, returned to Australia to take over the family property in the Western District of Victoria. After an initial defeat in 1954, he was elected to the Australian House of Representatives at the 1955 federal election, as a member of parliament (MP) for the division of Wannon. He was 25 at the time, making him one of the youngest people ever elected to parliament. He is the latest Prime Minister as of 2025 to represent a rural constituency. When Harold Holt became prime minister in 1966, Fraser was appointed Minister for the Army. After Holt's disappearance and replacement by John Gorton, Fraser became Minister for Education and Science (1968–1969) and then Minister for Defence (1969–1971). In 1971, Fraser resigned from cabinet and denounced Gorton as "unfit to hold the great office of prime minister"; this precipitated the replacement of Gorton with William McMahon. He subsequently returned to his old education and science portfolio.

The attorney-general of Australia (AG), also known as the Commonwealth Attorney-General, is the minister of state and chief law officer of the Commonwealth of Australia charged with overseeing federal legal affairs and public security as the head of the Attorney-General’s Department. The current attorney-general is Michelle Rowland, who was chosen by prime minister Anthony Albanese in May 2025 following the 2025 federal election. By convention, the attorney-general is a lawyer.

The attorney-general is one of only four positions in the Commonwealth Government to have continuously been held since federation, along with the prime minister, the minister for defence and the treasurer.

The Treasurer of Australia, also known as the Federal Treasurer or more simply the Treasurer, is the minister of state of the Commonwealth of Australia charged with overseeing government revenue collection, federal expenditure and economic policy as the head of the Department of the Treasury. The current treasurer is Jim Chalmers, who was selected by Prime Minister Anthony Albanese in May 2022 following the 2022 Australian federal election.

The Treasurer implements ministerial powers through the Department of the Treasury and a range of other government agencies. According to constitutional convention, the Treasurer is always a member of the Parliament of Australia with a seat in the House of Representatives. The office is generally seen as equivalent to the Chancellor of the Exchequer in the United Kingdom or the Secretary of the Treasury in the United States or, in some other countries, the finance minister. It is one of only four ministerial positions (along with prime minister, Minister for Defence and Attorney-General) that have existed since Federation.

Kim Christian Beazley (born 14 December 1948) is an Australian former politician and diplomat. Since 2022 he has served as chairman of the Australian War Memorial. Previously, he was leader of the Australian Labor Party (ALP) and leader of the opposition from 1996 to 2001 and 2005 to 2006, having previously been a cabinet minister in the Hawke and Keating governments. After leaving parliament, he served as ambassador to the United States from 2010 to 2016 and 33rd governor of Western Australia from 2018 to 2022.

Beazley was born in Perth, the son of politician Kim Beazley Sr. He studied at the University of Western Australia and Balliol College, Oxford, as a Rhodes Scholar. After a period as a lecturer at Murdoch University, Beazley was elected to Parliament at the 1980 election, winning the Division of Swan. Prime Minister Bob Hawke appointed Beazley to the cabinet following Labor's victory at the 1983 election, and Beazley served as a minister continuously through to the party's defeat at the 1996 election. His roles included Minister for Defence from 1984 to 1990, Leader of the House from 1988 to 1996, Minister for Finance from 1993 to 1996 and the ninth deputy prime minister from 1995 to 1996.