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Australian Ambassadors and other representatives

Ambassador to the United States of America

Mr Greg Moriarty AO

Mr Moriarty was Secretary of the Department of Defence from 2017 to 2026. In this role he was responsible for strategy, policy, budget and resource allocation and stewardship of the Department of Defence.

Prior to this, Mr Moriarty held senior roles in the Prime Minister's office, was Australia’s Counter Terrorism Coordinator (2015-2017) and Deputy Secretary in the Department of Foreign Affairs and Trade.

Mr Moriarty has served overseas as Ambassador to Indonesia (2010-2014), Ambassador to Iran (2005-2008) and Senior Negotiator with the Peace Monitoring Group on Bougainville. He also served in the Headquarters of the United States Central Command in the Persian Gulf during Operations Desert Shield and Desert Storm.

Mr Moriarty holds a Bachelor of Arts degree with Honours from the University of Western Australia and a Master’s degree in Strategic and Defence Studies from the Australian National University.

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