Michael Costello AO FAICD BA LLB (Melb), principal of Michael Costello Associates, is an independent director, strategist and ADR practitioner.

He has two decades' experience in the private sector as CEO of the energy utility ActewAGL (2008-2018), CEO of the water utility ACTEW (2003-2008), and Head of Strategy and Deputy Chief Executive of the Australian Stock Exchange (1996-1998).

Earlier, as a public servant and diplomat, Michael served as Secretary of the Department of Industrial Relations, Secretary of the Department of Foreign Affairs and Trade (DFAT), Ambassador to the United Nations, Deputy Head of Current Intelligence at the Office of National Assessments (ONA) and as a director of the Export Finance and Insurance Corporation (EFIC).                             

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.