Professor of International Relations, Panteion University, Athens; former Minister of Education; President of the European Council (level of Ministers of Education during Greece's Presidency of the EU, 1/1/2014-31/6/2014); Chair of the Department of International and European Studies, Panteion University (2006-2010); Member of the High Council of the European University Institute, Florence (2004-2009); Senior Research Associate, The Martens Center for European Studies; Post-doctoral fellow, at the Center for European Studies, Harvard University (1990-1992); Assistant Professor at the department of Public and International Affairs, George Mason University (1992-19950; written books on Transitions from Authoritarianism to Democracy, on Transatlantic Relations, on US Foreign Policy, on European Liberalism.