He served as adviser to the Hellenic Bank Association, the Ministry of National Economy (Greece) and various other businesses.
He was member of the Economic Committee of the OECD (1993-2000) and Financial Advisor to the Prime Minister of Greece in the period 1994-2000.
In December 2009, he resigned from the Board of Directors of Lambrakis Press to take over as Chairman of the BoD in Hellenic Petroleum.
On November 11, 2011, he took over as the Minister of the Interior (Greece) of the Loukas Papademos government.
In March 2015 he was appointed Chairman of the BoD of LAMDA Development Company.