The Department of Defence, also known simply as Defence, is a department of the Australian Government that is responsible for administering the Australian Defence Force (ADF) and its related entities, and is charged with the defence of Australia and its national interests.[4] Along with the ADF, it forms part of the larger Australian Defence Organisation (ADO) and is accountable to the Parliament of Australia, on behalf of the Australian people, for the efficiency and effectiveness with which it carries out government policy.
The executive head of the department, who leads it on a day-to-day basis, independent of a change of government, is the Secretary of the Department of Defence (SECDEF), currently Greg Moriarty. SECDEF reports to the Minister for Defence, Richard Marles.
History
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Australia has had at least one defence-related government department since Federation in 1901. The first Department of Defence existed from 1901 until 1921. In 1915, during World War I, a separate Department of the Navy was created. The two departments merged in 1921 to form the second Department of Defence, regarded as a separate body.[5]
A major departmental reorganisation occurred in the lead-up to World War II. The Department of Defence was abolished and replaced with six smaller departments – the Defence Co-ordination (for defence policy, financial, and administrative matters), three "service departments" (Army, Navy, and Air), the Supply and Development (for munitions and materiel), and Civil Aviation.[5] The current Department of Defence was formally created in 1942, when Prime Minister John Curtin renamed the existing Department of Defence Co-ordination. The other defence-related departments underwent a series of reorganisations, before being merged into the primary department over the following decades. This culminated in the abolition of the three service departments in 1973. A new Department of Defence Support was created in 1982, but abolished in 1984.[6]
In May 2022, the Canberra Times reported that department had been renamed Defence Australia.[7] However, the department's corporate documents continue to refer to it as the Department of Defence.[8]
The Defence Committee is the primary decision-making committee in the Department of Defence, supported by six subordinate committees, groups and boards. The Defence Committee is focused on major capability development and resource management for the Australian Defence Organisation and shared accountability of the Secretary and the Chief of the Defence Force.[10]
As of 2016[update] the Department of Defence consists of ten major organisational groups:[11]
Associate Secretary Group – provides administrative, legal and governance services including audit and fraud control, security and vetting, the Judge Advocate General, and communications and ministerial support.
Chief Information Officer Group – leads the integrated design, cost effective delivery, and sustained operation of Defence information
Chief Finance Officer Group – to drive the financial and management improvement programs for Defence
Defence People Group – human resource outcomes across the Defence employment cycle from strategy and policy development, through to implementation and service delivery
Defence Estate and Infrastructure Group – consolidated service delivery organisation for Defence that enables Defence capability by working in partnership to deliver integrated services through a highly capable workforce
The Secretary of the Department of Defence (SECDEF) is a senior public service officer and historically the appointees have not come from military service.
Appointment terminated by the Governor-General on the recommendation of Prime Minister Howard. Barratt fought the decision in the Federal Court, losing on appeal.
^CA 46: Department of Defence [III], Central Office, National Archives of Australia, retrieved 9 February 2021
^Macmillan, Jade; Greene, Andrew (30 June 2020). "Australia to spend $270b building larger military to prepare for 'poorer, more dangerous' world and rise of China". Australian Broadcasting Corporation. Retrieved 9 July 2020.
^"Portfolio Budget Statements 2019-20, Budget Related Paper No. 1.4A" (PDF). Department of Defence. 2019. Retrieved 9 July 2020.
^"Defence Leaders: Senior Managers". Department of Defence. Commonwealth of Australia. Retrieved 10 November 2013.
^ ab"Defence: Administrative History". National Archives of Australia. Retrieved 3 April 2019.
^"Department of Defence [III]". National Archives of Australia. Retrieved 3 April 2019.
^"Federal department rebrands as Defence Australia". The Canberra Times.
^"Organisation structure". Retrieved 11 February 2025.
^"Australian Strategic Policy Institute Limited Annual Report 2018-2019". www.transparency.gov.au. Retrieved 31 March 2023.
^"Who we are and what we do". Australian Government Department of Defence. Retrieved 7 August 2017.
^"Groups: About us". Department of Defence. Australian Government. Retrieved 6 January 2016.
^Peever, David (April 2015). "First Principles Review: Creating One Defence" (PDF). Retrieved 1 June 2015.
^"Fact Sheet: Smaller Government: Defence Materiel Organisation: Reintegration into the Department of Defence" (MS Word). Department of Defence, Australian Government. May 2015.
^"Stop Press! Name Change" (Press release). 31 July 2015. Archived from the original on 19 September 2015. Retrieved 9 December 2015. As part of the First Principles Review implementation, from 1 July 2015 the Defence Science and Technology Organisation (DSTO) has been renamed as the Defence Science and Technology Group.
^Intelligence and Security Group Archived 12 September 2011 at the Wayback Machine, Australian Government Directory
^Mitcham, Chad J. ‘Bland, Sir Henry Armand (Harry) (1909-1997)’, Australian Dictionary of Biography, National Centre of Biography, Australian National University, https://adb.anu.edu.au/biography/bland-sir-henry-armand-harry-1549/text41469
^James, Lieutenant Colonel Neil (May 2000). Reform of the Defence Management Paradigm : A Fresh View(PDF). Working Paper Series. Strategic and Defence Studies Centre. p. 40. ISBN 0-7317-0441-X. Retrieved 10 November 2013.