Mayer completed the Higher School Certificate in 1983 at North Sydney Boys High School. He joined the Royal Australian Naval College in 1984 as a seaman specialist, and on completion of initial training Mayer gained Bridge Watch-keeping Certificates on board HMAS Gladstone and HMAS Darwin. Mayer completed training as an Air Intercept Controller and returned to sea in HMA ships Canberra and HMAS Sydney, including service aboard Sydney "as Air Intercept Control Officer and Boarding Officer during that ship's operational deployment to the Persian Gulf during the 1990–91 Gulf war."[2]
In 1993 Mayer commenced training as a Principal Warfare Officer (Direction) and graduated with distinction in 1994. As Direction Officer, Mayer served aboard both HMAS Canberra and HMAS Adelaide, undertaking a wide range of regional deployments and operations, including service as the Task Unit Operations Officer during Operation Stabilise – ADF operations in support of East Timorese independence.[2]
In January 2000 Mayer was promoted to commander and posted to the United States as the first ADF Liaison officer to US Joint Forces Command based in Norfolk, Virginia. Mayer returned from the United States in mid-2002 and assumed command of HMAS Canberra, continuing an association with that ship that included service in every rank from trainee to commanding officer.[2]
Mayer left HMAS Canberra in July 2004 and was promoted to the rank of captain and assumed the position of Chief Staff Officer (Operations) at Maritime Headquarters (MHQ) Australia in January 2005. While posted to MHQ, Mayer was seconded to the Australian Maritime Deployable HQ staff for duties as Commander Task Group 58.1 – Northern Arabian Gulf Maritime Security Operations Commander. Mayer was awarded a Commendation for Distinguished Service for his "distinguished performance" in this role.[3] Mayer returned to MHQ in October 2005, resuming duties as Chief Staff Officer (Operations).[2] His "outstanding achievement" while with MHQ led to the award of a Conspicuous Service Cross (CSC) in 2008.[4]
Senior commands
Rear Admiral Mayer, as Commander of the Australian Fleet, aboard USS Independence, 2014
In January 2007 Mayer attended the Australian Defence College and read for a Master of Arts in Strategic Studies. He assumed command of the frigate HMAS Anzac in December 2007 and completed deployments to exercise RIMPAC and to Southeast Asia as the Commander of the RAN Task Group. Mayer left Anzac in mid-2009, was promoted to commodore and appointed Commander of the multi-national International Stabilisation Force (ISF) in East Timor on 24 October 2009. The first non-army officer to hold this command, Mayer demonstrated "inspirational leadership and initiative, and outstanding dedication to duty in [a] stable but fragile security environment" during his six-month deployment, for which he was awarded a Bar to his CSC and the East Timorese Medal of Merit.[5][6]
In April 2019 it was announced that Mayer would be appointed Deputy Commander United Nations Command in South Korea later in the year.[10][11] He relinquished Head Force Design in June and, promoted vice admiral on 18 July,[9] succeeded Lieutenant General Wayne Eyre of the Canadian Army as Deputy Commander on 28 July.[12] He was the second non-American (after Eyre) and first Australian to hold the post in the 69-year history of United Nations Command.[11][12] Mayer relinquished the post on 15 December 2021. For his work with United Nations Command, Mayer was awarded an Officer of the United States Legion of Merit.[9][13]
.jpg)
