Mr Green was appointed as Australia's High Commissioner to Singapore in November 2012.
He has previously served overseas as High Commissioner in South Africa (2004-2008), and in Kenya (1998-2000).
Mr Green has also held a number of senior positions in Australia. He was Chief of Staff to Foreign Minister Kevin Rudd (2010-2012) and previously served as Mr Rudd's International Adviser when he was Prime Minister.
In 2004, Mr Green headed the secretariat for the Review of Australian Intelligence Agencies. He was Deputy Principal Member at the Refugee Review Tribunal from 2001-2002, and has served also as Director in the International Division of the Department of Prime Minister and Cabinet.
Mr Green holds a Bachelor of Arts with First Class Honours and a Bachelor of Law from the University of Sydney.
In 2002, he was awarded the Order of Australia Medal for his role in the response to the Bali terrorist tragedy.