Mr Byrne is a senior career officer with the Department of Foreign Affairs and Trade (DFAT) and was until recently Minister and Deputy Head of Mission at the Australian Embassy in Manila. He has previously served overseas at the Australian Embassy in Jakarta, and on short term missions in Singapore and Bougainville.
In Canberra, Mr Byrne's roles have included Assistant Secretary of Consular Policy and Canada and Latin America Branches. Prior to joining DFAT, Mr Byrne worked in the departments of Defence; Infrastructure; and Prime Minister and Cabinet.
Mr Byrne holds a Masters degree from the Institute of Defence and Strategic Studies in Singapore, a Bachelor of Arts (Honours) and Bachelor of Science from Flinders University.