Rear Admiral Michael Julian van Balen is a retired senior officer of the Royal Australian Navy (RAN), who served as the Deputy Chief of Navy from 2013 to January 2016.

Air Chief Marshal Mark Donald Binskin, is a former senior officer in the Royal Australian Air Force. He served as Chief of Air Force (2008–11), Vice Chief of the Defence Force (2011–14), and Chief of the Defence Force from June 2014 until his retirement in July 2018. In February 2020 he was appointed as a Commissioner and Chairman of the Royal Commission into National Natural Disaster Arrangements.

Air Marshal Geoffrey Charles "Geoff" Brown, is a retired senior officer of the Royal Australian Air Force. He served as Chief of Air Force from 4 July 2011 until his retirement on 3 July 2015.

Lieutenant General Richard Maxwell "Rick" Burr, is a senior officer in the Australian Army and the current Chief of Army since 2 July 2018. He served as Commander 1st Division from 2011 to 2012, Deputy Commanding General – Operations, United States Army Pacific from January 2013 to November 2014, and Deputy Chief of Army from 2015 to 2018.

Debbie Ann Butterworth, & Bar is the most senior sailor of the Royal Australian Navy, having been appointed Warrant Officer of the Navy in November 2019.

Lieutenant Colonel Garth Callender is the author of After the Blast: An Australian Officer in Iraq and Afghanistan, published by Black Inc. in 2015.

Major General John Patrick Cantwell, is a retired senior Australian Army officer.

Air Marshal Gavin Neil "Leo" Davies, is a retired senior officer of the Royal Australian Air Force (RAAF). A navigator who retrained as a pilot, he joined the RAAF in 1979, commanded No. 1 Squadron RAAF (2002–03) and No. 82 Wing RAAF (2004–05), deployed to Iraq in 2007, and was Australia's air attaché in Washington, D.C. (2010–11). He served as Deputy Chief of Air Force from 2012 to 2015 and succeeded Air Marshal Geoff Brown as Chief of Air Force, the professional head of the RAAF, in July 2015. He retired from the RAAF in July 2019.

Mark Gregor Strang Donaldson, is an Australian soldier and a recipient of the Victoria Cross for Australia, the highest award in the Australian honours system. Then Trooper Donaldson was a member of the Special Air Service Regiment (SASR) when he exposed himself to enemy fire to protect injured troops and then rescued an interpreter under heavy enemy fire in the Battle of Khaz Oruzgan during Operation Slipper, the Australian contribution to the War in Afghanistan. He was presented with the decoration by the Governor-General of Australia, Quentin Bryce, in a ceremony in Canberra on 16 January 2009. On 25 January 2010, Donaldson was named the 2010 Young Australian of the Year. He was promoted to corporal in June 2010.

Rear Admiral Allan Kendall du Toit, is a retired senior officer of the Royal Australian Navy, who served as Australia's Military Representative to NATO and the European Union from 2013 until his retirement in 2016. Du Toit previously served as the Commander Border Protection Command until being succeeded by Rear Admiral Tim Barrett in February 2010.

Major General Justin Frederick Ellwood,, commonly known as Jake Ellwood, is a senior officer in the Australian Army. He joined the army via the Royal Military College, Duntroon in 1989 and was commissioned into the Royal Australian Infantry Corps. He has commanded the 5th Battalion, Royal Australian Regiment (2006–08), Overwatch Battle Group (West) (2007), Battle Group Tiger (2008) and the Combat Training Centre, and deployed on operations to Kosovo, East Timor, Iraq and Afghanistan. He served as Deputy Chief of Army from May to December 2018, and assumed command of the 1st Division on 6 December 2018.
Lieutenant General Mark Evans, is a retired senior officer in the Australian Army. He served as Chief of Joint Operations from July 2008 until his retirement in May 2011.

Major General Christopher Antony Field, is a senior officer in the Australian Army. He joined the army via the Australian Defence Force Academy in 1984 and was commissioned into the Royal Australian Infantry Corps. He has commanded the 1st Battalion, Royal Australian Regiment (2003–05), Combined Joint Task Force 635 (2004–05) and the 3rd Brigade (2015–17), coordinated reconstruction efforts in Queensland in the wake of the 2010–11 Queensland floods and Cyclone Debbie, and deployed on operations to East Timor, Iraq, the Solomon Islands and Afghanistan. He was Commander Forces Command from June 2019 to February 2020, and has been Deputy Commanding General, Operations for United States Army Central since March 2020.

Rear Admiral Stephen Richard Gilmore, is a retired senior officer of the Royal Australian Navy. He served as Commander Australian Fleet from October 2009 until December 2011, and as the Head Australian Defence Staff (Washington) and Australian Defence Attaché at the Embassy of Australia, Washington, D.C. from January 2014 until his retirement in 2017.

Air Marshal Melvin Ernest Glanville Hupfeld, is a senior officer in the Royal Australian Air Force. He served as Air Commander Australia from 2012 to 2014 and was the acting and final Chief Capability Development Group (2015–16), before being appointed as Head Force Design in the Vice Chief of the Defence Force Group (2016–18). He was promoted air marshal and made Chief of Joint Operations in May 2018, and succeeded Air Marshal Leo Davies as Chief of Air Force in July 2019.

Daniel Alan Keighran, is an Australian soldier and a recipient of the Victoria Cross for Australia, the highest award in the Australian honours system. Keighran was awarded the Victoria Cross for Australia for his actions in the Battle of Derapet on 24 August 2010, during the War in Afghanistan. He was presented with the medal by the Governor-General of Australia, Quentin Bryce, at a ceremony in Canberra on 1 November 2012. Keighran is the third soldier to be awarded the Victoria Cross for Australia, and the first member of the Royal Australian Regiment so awarded.

Major General Mark Andrew Kelly, is a former senior officer in the Australian Army. He served as Commander Joint Task Force 633 commanding all Australian Forces in the Middle East Area of Operations and Afghanistan from 12 January 2009 until 14 January 2010, and as Land Commander Australia from July 2005 to December 2008. He was appointed as the Repatriation Commissioner on 1 July 2010 and served in that role until 30 June 2019.

Colonel Michael Joseph Kelly, is a former Australian politician who twice represented the Division of Eden-Monaro in the Parliament of Australia, from 2007 to 2013 and again from 2016 to 2020. He is a member of the Australian Labor Party (ALP).

Jacob Bruce "Jake" Kovco was a private in the Australian Army who was killed while deployed to Iraq, fatally wounded by a single shot to the head from his own Browning 9mm sidearm. He was the first Australian soldier to die while deployed to the Middle East Area of Operations. A military inquiry found Private Kovco accidentally shot himself while mishandling his pistol. This conclusion was disputed by his family and on 2 April 2008, a second inquest returned a similar verdict, finding that his death was "irresponsibly self-inflicted", and that when he pulled his gun's trigger he "disregarded the possible consequences of danger".

Vice Admiral Stuart Campbell Mayer, is a senior officer in the Royal Australian Navy. He commanded the International Stabilisation Force in Timor-Leste from 2009 to 2010, was Commander Australian Fleet from 2014 to 2018, and served as Head Force Design within the Vice Chief of Defence Force Group from 2018 to 2019. He assumed his current appointment as Deputy Commander United Nations Command, based in South Korea, in July 2019.
Colonel Michael Anthony Mumford, is a career officer in the Australian Army, now serving as a part of the Australian Army Reserve.

Andrew Alexander Nikolic is a former Australian politician, retired senior Australian Army officer, and a former public servant in the Department of Defence. He was elected to the Australian House of Representatives as the Liberal Party representative for the Tasmanian seat of Bass at the 2013 federal election, but after one term, he lost his seat at the 2016 federal election.

Major General Roger John Noble, is a senior officer in the Australian Army. He joined the army via the Australian Defence Force Academy in 1984 and was commissioned into the Royal Australian Armoured Corps. He has commanded the 2nd Cavalry Regiment, Al Muthanna Task Group (2005) and the 3rd Brigade (2013–15), and has deployed six times on operations to East Timor, Afghanistan and Iraq. He was seconded to the United States Army in 2016 and served as Deputy Coalition Land Force Commander, Iraq, as part of Operation Inherent Resolve, and subsequently as Deputy Commanding General – North in the United States Army Pacific (2017–19). He assumed his current appointment as Head Military Strategic Commitments in 2019.

Vice Admiral Michael Joseph Noonan, is a senior officer in the Royal Australian Navy and the Chief of Navy since 6 July 2018. He previously served as Commander Border Protection Command from 2013 to 2015 and Deputy Chief of Navy from 2016 to 2018.

Lieutenant General Brian Ashley "Ash" Power is a retired senior officer of the Australian Army. Power served as Chief of Joint Operations from 2011 until his retirement in May 2014.

Benjamin Roberts-Smith, is an Australian businessman, former Australian Army soldier and a recipient of the Victoria Cross for Australia (VC), the highest award in the Australian honours system. Roberts-Smith was awarded the VC for his actions during a helicopter assault into Tizak on 11 June 2010 as part of an offensive in the Shah Wali Kot region while serving with the Special Air Service Regiment in Afghanistan. The medal, together with his Medal for Gallantry awarded during a tour of Afghanistan in 2006, made Roberts-Smith the most highly decorated serving member of the Australian Defence Force. He was presented with the VC by the Governor-General of Australia, Quentin Bryce, at a ceremony in Perth on 23 January 2011. He was also later awarded a Commendation for Distinguished Service for his leadership as a patrol commander during a 2012 tour of Afghanistan.

Rear Admiral Michael John Slattery, is a Royal Australian Naval Reserve officer and lawyer. He has been a justice of the Supreme Court of New South Wales since 2009 and the Judge Advocate General of the Australian Defence Force since July 2014.

Warrant Officer Robert Swanwick is a Royal Australian Air Force non-commissioned officer. He served as Warrant Officer of the Air Force from 1 December 2015 until 6 November 2019.

Peter Charles Tinley is an Australian politician and former soldier. Peter has been a Labor Party member of the Western Australian Legislative Assembly since November 2009, representing the electorate of Willagee.

Major General Simone Louise Wilkie, is a retired Australian Army officer who was the Australian Deputy National Commander in the War in Afghanistan in 2011 and 2012. She was Assistant Chief of Staff to General David Petraeus during the Iraq War troop surge of 2007, and was the first female Commanding Officer of the Royal Military College, Duntroon and Commandant at the Army Recruit Training Centre at Kapooka. In March 2013 the Minister for Defence, Stephen Smith, announced her promotion to major general to take over as Commander of the Australian Defence College in July 2013.