Professor of International Law and International Relations.

Before joining PRIO he was with Istanbul Bilgi University, where he has been the Director of the M.A. in International Relations Program and the Director of the Turkish-Greek Studies Division. In Istanbul he was also Adjunct Professor of International Law at Koc University.

Educated at the London School of Economics and the Panteion University of Athens, he has held positions at the University of Cambridge and the Institute of International Relations, Athens.

His teaching, research and policy interests lie primarily in the fields of public international law, the law of the sea, foreign policy, energy geopolitics, the Eastern Mediterranean, Greece, Cyprus and Turkey, and has published extensively in these areas.

Some of his recent publications in his current area of engagement include:

Tzimitras, H. “Reconceptualizing Conflict and Cooperation over Energy in the East Mediterranean”, KAS Multinational Development Policy Dialogue Papers 1, Brussels: Konrad-Adenauer-Stiftung, 2025 Tzimitras, H.  “Constructive Engagement between Rivals in the Eastern Mediterranean” in E. Cohen-Hadria & C. Limon (eds.), Morocco and Algeria Beyond the Divide From Costs of Non-Engagement to Pathways for Cooperation,  Council for Mediterranean Diplomacy and Friedrich-Ebert-Stiftung, January 2025

Tzimitras, H. “Opportunities and Challenges for Conflict Resolution and Border Delimitation in the Eastern Mediterranean post Israel-Lebanon Agreement”, in IEMed Mediterranean Yearbook 2023 - Strategic Sectors | Security & Politics. Spain: European Institute of the Mediterranean, 2023 N.Tocci, H. Tzimitras et. al. “For a New Euro-Med Green Deal” IAI Commentaries 48, Istituto Affari Internazionali, Rome, October 2023 Baev, P., Marsh, N., and Tzimitras, H., The Energy Crisis Hits Europe: Resonance for the Global South and Climate Change, PRIO Policy Brief, Oslo, 2022 Tzimitras, H. Political Trouble Spots in the Eastern Mediterranean Area: Changes and Challenges for a Functioning Security Architecture, German Institute for International and Security Affairs (SWP), Berlin, 12/2020 Tzimitras, H. “Eastern Mediterranean Hydrocarbons Prospects: In Need of a Pragmatic Geopolitical Assessment” IAI Commentaries 19/18, Istituto Affari Internazionali, Rome, March 2019 Tzimitras, H. & Gurel-Moran, A. “Cyprus: The Prospects for Peace” OSCE Yearbook 2017, Centre for OSCE Research, Institute for Peace Research and Security Policy, University of Hamburg, June 2018 Tzimitras, H. & Gurel-Moran, A. “Cyprus: Energy Hopes and Political Troubles” in Jalilvand, D.R. and Westphal, K. (eds.) The Political and Economic Challenges of Energy in the Middle East and North Africa. Oxford & New York: Routledge, 2017 Tzimitras, H. & Hatay, M. “The Need for Realism: Solving the Cyprus Problem through Linkage Politics” Turkey Project Policy Paper Number 9, Center on the United States and Europe, Brookings Institution, Washington D.C., October 2016 Ellinas, C., Roberts, J. & Tzimitras, H. Hydrocarbon Developments in the Eastern Mediterranean: The Case for Pragmatism. Global Energy Center and Dinu Patriciu Eurasia Center, Atlantic Council. Washington, D.C., 2016

Gurel, A. and Tzimitras, H. “Gas Can Become the New Lost Opportunity” in Kerr Lindsay, J. (ed.) Resolving Cyprus: New Approaches to Conflict Resolution. London: I.B. Tauris, 2014 Tzimitras, H.Z. “Alternative Forms of Nationalism: Superiority through Law in Greek Foreign Policy” in Aktar, A., Kizilyurek, N. & Ozkirimli, U. (ed.) Nationalism in the Troubled Triangle: Cyprus, Greece and Turkey. London: Palgrave Macmillan, 2010 Tzimitras, H.Z. “Europe, Nationalism and Turkish-Greek Aegean Disputes” in Nikolaidis, K., Anastasakis, O. & Oktem, K. (ed.) Under the Long Shadow of Europe: Greeks and Turks in the Era of Post-Nationalism. Leiden & Boston: Brill/ Martinus Nijhoff, 2009