Michael is the Chief Executive Officer of ActewAGL. Before his appointment to ActewAGL in 2008, he was Managing Director of ACTEW Corporation, a member of the ACTEW Board and a member of the ActewAGL Joint Venture Partnerships Board from 2003.

Michael is a member of the Advisory Council of the Australian National University's Crawford School of Economics and Government.

Michael was previously Deputy-Managing Director of the Australian Stock Exchange. He was Chief of Staff to the Hon Kim Beazley AC, a former Labor Opposition Leader and to the Hon Bill Hayden AC when he was the Minister for Foreign Affairs. Michael has been the Secretary of the Department of Foreign Affairs and Trade and the Department of Industrial Relations. He has held a number of diplomatic posts including Ambassador to the United Nations.

Michael holds degrees in arts and law. He is a Fellow of the Australian Institute of Company Directors. He received an Order of Australia (AO) in 1996 for international relations.