-Professor of International and European Institutions, President of the Department of International and European Studies, Panteion University (Athens)

-Head, Section on Human Rights and Humanitarian Law Policy, Institute of International Relations (Athens)

-Visiting Professor and lecturer in various Universities and other Institutions abroad

-Advocate, Member of the Athens Bar

-Former Secretary General of European Affairs, Hellenic Ministry of Foreign Affairs (Febr.1996 - May 2000)

-Delegate of Greece in various international conferences and institutions (1993-) in particular in the European Union (Presidencies of Greece during 1983, 1988, 1994) at the European Community/Union (1983,1988, 1994).

-Greek Representative in the EU Intergovernmental Conference 1996-1997

-Agent of the Hellenic Government in several cases before the European Court of Justice

-Arbitrator in the Court of Conciliation and Arbitration of the OSCE

-Member of the European Commission against Racism and Intolerance (2003-)

-Member, International Humanitarian Fact- Finding Commission (2002-)

-Member, National Commission on Human Rights (2000-) Chairman, Hellenic Commission on the Implementation and Dissemination of International Humanitarian Law

-Member, International Institute of Humanitarian Law (San Remo)

-President, Hellenic Society of International Law and International Relations

-Author of 200 studies published in Greece and abroad, concerning issues of International Law, International Protection of Human Rights, International Humanitarian Law, European Law and Integration, Hellenic Foreign Policy etc.

-Lecturer at the Diplomatic Academy of the Hellenic MFA, at the War Schools of the Hellenic Armed Forces and the Police Academy