Bill Costello commenced as Assistant Secretary, Labour Mobility and Economic Growth Branch in The Office of the Pacific, Australian Department of Foreign Affairs and Trade (DFAT), in February 2020. His previous role was as Minister Counsellor, International Development, at the Australian Embassy in Washington, DC from January 2016. Within DFAT, Bill was previously in charge of the Health and Water Branch and concurrently led DFAT’s Ebola Taskforce in 2014/15. Prior to this he worked as Assistant Secretary in DFAT’s Humanitarian Division. Bill has been a development professional for more than 30 years, and a member of AusAID’s and DFAT’s Senior Executive from 2008. Bill holds a Masters in Public Policy from the Australian National University and a Bachelor of Science (Applied Geography) from the (then) Canberra College of Advanced Education.