Ms Millar is Deputy Secretary for International Security, Humanitarian and Consular issues in the Australian Department of Foreign Affairs and Trade.
From October 2017 to March 2018 Ms Millar was Chargé d'Affaires a.i. at the Australian Mission to the European Union and NATO and the Australian Embassy to Belgium and Luxembourg. Ms Millar was Deputy Head of Mission at the Australian Embassy in Washington from January 2014 to September 2017. She served as Ambassador to the United Nations at Geneva and Ambassador for Disarmament from 2006 to 2010.
Ms Millar has worked extensively on international security and multilateral issues and on Australia’s relationship with the United States. Her positions in the Department in Canberra have included First Assistant Secretary International Security Division, Head of the United Nations Security Council Campaign Task Force, Australian Ambassador for People Smuggling Issues and First Assistant Secretary, International Organisations and Legal Division. Ms Millar was seconded to the Office of National Assessments as senior Americas analyst from 1991 to 1992.
Overseas, Ms Millar has also served in the Australian Mission to the United Nations in New York, including as Acting Permanent Representative. She undertook an earlier posting in Washington and was also posted in Vietnam.
Ms Millar was educated at the University of Cambridge and holds a MA/BA (Hons) in history. She has studied French and Vietnamese. She is married with one daughter.