Mr Barrett has been Ambassador and Permanent Representative to the OECD since 1 August 2011.
Before this, he was the Australia Scholar at the Woodrow Wilson International Center for Scholars, Washington DC.
Mr Barrett was Chief of Staff to Treasurer Wayne Swan from 2007 to 2010. He served in the Victorian Department of Premier and Cabinet from 2003 to 2007, culminating in the position of Deputy Secretary of the Policy and Cabinet Group. He has also worked as a management consultant with the Boston Consulting Group in Melbourne. Mr Barrett has Masters degrees from Princeton University (public policy) and the University of Melbourne (international relations) as well as a Bachelor of Commerce and a Bachelor of Arts (Hons) also from the University of Melbourne.