Gus O'Donnell

Augustine Thomas O'Donnell, Baron O'Donnell, GCB, FBA, FAcSS (born 1 October 1952) is a former British senior civil servant and economist, who between 2005 and 2011 (under three Prime Ministers) served as the Cabinet Secretary, the highest official in the British Civil Service.

O'Donnell announced after the 2010 General Election that he would step down within that Parliament and did so at the end of 2011. His post was then split into three positions: he was succeeded as Cabinet Secretary by Sir Jeremy Heywood, as Head of the Home Civil Service by Sir Bob Kerslake (in a part-time role), and as Permanent Secretary in the Cabinet Office by Ian Watmore. Whilst Cabinet Secretary, he was regularly referred to within the Civil Service, and subsequently in the popular press, as GOD; this was mainly because of his initials. In 2012, he joined Frontier Economics as a senior advisor.

O'Donnell was born and raised in south London. Educated at Salesian College, Battersea, he read Economics at the University of Warwick before taking his MPhil degree at Nuffield College, Oxford. He was a lecturer at the University of Glasgow in the Political Economy Department from 1975 until 1979, when he joined the Treasury as an economist.

In 1985, O'Donnell joined the British Embassy in Washington, serving as the First Secretary of the Economics division for four years. In 1989 he became press secretary for the Chancellor of the Exchequer before transferring next door to serve as press secretary to the prime minister from 1990 to 1994.

From 1997 to 1998, O'Donnell was the United Kingdom's executive director to both the International Monetary Fund and the World Bank, again in Washington, before returning to HM Treasury to serve as both director of Macroeconomic Policy and Prospects and also head of the Government Economics Service, with overall responsibility for the professional economists in Her Majesty's Government. A year later, in 1999, he was appointed managing director of Macroeconomic Policy and International Finance, with responsibility for Fiscal Policy, International Development, and European Union Economic and Monetary Union.

On 8 July 2002, O'Donnell took over from Sir Andrew Turnbull as Permanent Secretary of the Treasury following the appointment of Sir Andrew as Cabinet Secretary. Three years later, on 15 June 2005, it was announced that O'Donnell would again replace Turnbull, this time as Cabinet Secretary, on the latter's imminent retirement. He took up office in August 2005.

O'Donnell is known for his "wondrous interpersonal gifts" and his informal style. He regularly visited Civil Service departments outside London "to meet civil servants at work".

During his time as Cabinet Secretary, his authority was seen as absolute, giving rise to the affectionate nickname "GOD" based on his initials as they appeared in Government papers.