Australian Ambassadors and other representatives
Ambassador to Timor-Leste
Mr William Costello
Mr Costello is a senior career officer with the Department of Foreign Affairs and Trade and was most recently Assistant Secretary, Labour Mobility and Economic Growth, Office of the Pacific. He has previously served overseas in Washington, Port Moresby, Manila, and Phnom Penh. In Canberra he has held senior leadership positions across a range of regional and development assistance roles. Mr Costello holds a Master of Public Policy from the Australian National University, and a Bachelor of Applied Science from Canberra College of Advanced Education.