Member of the Legal Service of the European Commission since March 2009. He is also visiting professor at Sciences Po (Paris) and at Universidad San Pablo CEU / Fundación Ortega y Gasset (Madrid). From January 2007 to February 2009 he was a Research Fellow at the Centrode Estudios Políticos y Constitucionales and an Associate Professor at Universidad Carlos III of Madrid. He has been a Marie Curie Fellow at the Robert Schuman Centre (2005-2006). He holds a Ph.D. from the European University Institute, an LL.M. from the College of Europe and a Spanish Law degree. From 2000 to 2004 he was a ré-férendaire at the European Court of Justice, firstin the chambers of President Rodríguez Iglesias(2000-2003), then with Advocate General Poiares Maduro (2003-2004). He has lectured and pub-lished extensively on European Union law. His publications include: Between Competition and Free Movement: The Economic Constitutional Law of the European Community (Hart, 2002); Beyond Competition: Services of General Interest and European Community Law, in G. de Búrca (ed.),EU Law and the Welfare State(OUP, 2005) and The Legacy of the Maastricht-Urteil and the Pluralist Movement, European Law Journal, 2008.