Loukas Tsoukalis is Jean Monnet Professor of European Integration at the University of Athens, President of the Hellenic Foundation for European and Foreign Policy, Visiting Professor at the College of Europe, and Special Adviser to the President of the European Commission. He is member of advisory councils of several European think tanks and international journals, as well as author of many books and articles on European and international affairs, including The New European Economy and What Kind of Europe? (OUP 2003) which was translated into several European languages.

Janis A. Emmanouilidis is a Senior Policy Analyst at the European Policy Centre in Brussels. He has published widely on the European Union's overall political and institutional development, the perspectives of differentiated integration in an EU 27+, the Union's foreign, security and defence policy, and on EU enlargement. He has been an advisor of various governments, EU institutions, European parties and NGOs on a broad range of issues related to European integration and has commentated widely on EU affairs in the media.

Josep Borrell: Fontelles President, European University Institute; Former President , European Parliament
Jonas Condomines Béraud: Principal Adviser, Political and Institutional Affairs, Bureau of European Policy Advisers, European Commission
Olaf Cramme: Director, Policy Network
Janis A. Emmanouilidis: Senior Policy Analyst, European Policy Centre
Dieter Helm: Professor of Energy Policy, Oxford University
Philippe Herzog: Founding President, Confrontations Europe; Special Advisor, Commissioner Michel Barnier
Jolyon Howorth: Professor Ad Personams, University of Bath; Visiting Professor of Political Science and International Affairs, Yale University
Zaki Laïdi: Professor, Sciences-Po, Centre d'Etudes Européennes
Roger Liddle Chair: Policy Network; Labour Member, House of Lords
Pier Carlo Padoan: Deputy Secretary-General and Chief Economist, OECD
André Sapir: Professor of Economics, Université Libre de Bruxelles; Senior Fellow, Bruegel
Loukas Tsoukalis: Professor of European integration, University of Athens; President, Hellenic Foundation for European and Foreign Policy