Prior to his current assignment, G. Thomas had professional assignments as: Deputy Minister for Environment and Energy in Greece (2019-2020); Deputy Director-General in the Directorate-General for Energy and Chairman of the Steering Board of the European Fund for Strategic Investments (EFSI) (2014-2019); Director Finance at DG ECFIN (2009-2014); member of the EIB and EIF Board of Directors (2009-2017); Head of cabinet of Joaquin Almunia, Commissioner for Economic and Monetary Affairs (2005-2009); Deputy Spokesman for Commission President Romano Prodi; Spokesman for economic and monetary affairs for Commissioner Pedro Solbes (2000-2004). Prior to 2004 held various positions in the European Commission, the European Investment Fund and in investment banking in London.