Staff in The Hague

Prof. Carsten Stahn | Prof. Kees Waaldijk| Prof. W.A. Schabas | Joseph Powderly | Dov Jacobs | Mette Léons | Martine WierengaJens M. Iverson  | Ioana Moraru | Lieneke Louman

Programme Director

Prof. Dr. Carsten Stahn
Carsten Stahnis Professor of International Criminal Law and Global Justice at Leiden University and Programme Director of the Grotius Centre for International Legal Studies. He has previously worked as Legal Officer in Chambersof the International Criminal Court (ICC) (2003-2008), as Reader in Public International Law and International Criminal Justice at Swansea University (2007-2008) and as Research Fellow at the Max Planck Institute for Comparative Public Law and International Law (2000-2003). He obtained his PhD degree (summa cum laude) from Humboldt University Berlin after completing his First and Second State Exam in Law in Germany. He holds LL.M. degrees from New York University and Cologne - Paris I (Panthéon-Sorbonne).

He is author of The Law and Practice of International Territorial Administration: Versailles to Iraq and Beyond (Cambridge University Press, 2008 and 2010), which received the Ciardi Prize 2009 of the International Society for Military Law and the Law of War. He has edited several volumes in the area of international criminal justice and published numerous articles in the areas of Peace and Security, International Courts and Tribunals, Transitional Justice and the Law of International Organisations. He is project leader of a four-year research project on Post-Conflict Justice and Local Ownership, supported by the Netherlands Organization for Scientific Research (NWO).

He is ICC editor of the Leiden Journal of International Law, Executive Editor of the Criminal Law Forum and Correspondent of the Netherlands International Law Review. His work has been cited in the jurisprudence of the ICC, the ICJ and the European Court of Human Rights.

Chair in Comparative Sexual Orientation Law

Prof. mr. C. Waaldijk

Dr. Kees Waaldijk holds the chair in Comparative Sexual Orientation Law. This endowed chair, unique in Europe, has been made possible by private gifts to the Leiden University Fund. The chair is based at the Leiden Law School’s Grotius Centre for International Legal Studies, at the Hague campus of Leiden University
Professor Waaldijk has been active in the field of law and homosexuality for many years, and was responsible for major comparative legal research projects. He has published books, articles and reports in many languages. Kees Waaldijk studied law in Rotterdam, followed a course in gay and lesbian studies in Amsterdam, and did his PhD in Maastricht (on The Legislature’s Duties to Give Reasons). He has been employed at the Leiden Law School since 1996, first as a lecturer in legal methods, and since December 2000 as the Head of PhD Studies at the Meijers Institute (Leiden Law School’s research institute and graduate school). Kees Waaldijk has also worked at the universities of Rotterdam, Maastricht, Utrecht, Edinburgh and Lancaster, and at UC Hastings in San Francisco.

Chair in International Criminal Law and Human Rights

Prof. dr. W.A. Schabas
Professor Schabas holds BA and MA degrees in history from the University of Toronto and LLB, LLM and LLD degrees from the University of Montreal, as well as honorary doctorates in law from Dalhousie University, Case Western Reserve University and Northwestern University. He is the author of more than twenty books dealing in whole or in part with international human rights law, including The International Criminal Court: A Commentary on the Rome Statute (Oxford: Oxford University Press, 2010), Introduction to the International Criminal Court (Cambridge: Cambridge University Press, 2011, 4th ed.), Genocide in International Law (Cambridge: Cambridge University Press, 2nd ed., 2009) and The Abolition of the Death Penalty in International Law (Cambridge, Cambridge University Press, 2003, 3rd ed.). He has also published more than 300 articles in academic journals, principally in the field of international human rights law and international criminal law.

Professor Schabas is editor-in-chief of Criminal Law Forum, the quarterly journal of the International Society for the Reform of Criminal Law. He is Chairman of Board of Trustees of the United Nations Voluntary Fund for Technical Assistance in the Field of Human Rights, President of the International Association of Genocide Scholars, President of the Irish Branch of the International Law Association and chair of the International Institute for Criminal Investigation. From 2002 to 2004 he served as one of three international members of the Sierra Leone Truth and Reconciliation Commission. Professor Schabas has worked as a consultant on capital punishment for the United Nations Office of Drugs and Crime, and drafted the 2010 report of the Secretary-General on the status of the death penalty (UN Doc. E/2010/10).

Assistant Professor

Joseph Powderly

Joseph Powderly joined the Grotius Centre as Assistant Professor of Public International Law in March 2011. Prior to this he was a Research Fellow in International Criminal and Humanitarian Law at the TMC Asser Institute, The Hague. Between September 2008 and January 2010, he was a Doctoral Fellow/Researcher at the Irish Centre for Human Rights, where he worked, among other projects, on a Irish Government-funded investigation and report into the possible perpetration of crimes against humanity against the Rohingya people of North Rakhine State, Burma/Myanmar. In spring 2009 he undertook a field investigation in the region. This report was launched by the Irish Department of Foreign Affairs in June 2010. He is currently the process of completing his doctoral research - under the supervision of Professor William Schabas - which looks at the impact of theories of judicial interpretation on the development of international criminal and international humanitarian law. The central thesis aims to identify and analyze the potential emergence of a specific theory of interpretation within the sphere of judicial creativity. In January 2008, he was awarded a Postgraduate Research Scholarship from the Irish Research Council for the Humanities and Social Sciences. Along with Dr. Shane Darcy of the Irish Centre for Human Rights, he is co-editor of and contributor to the edited collection Judicial Creativity in International Criminal Tribunals which was published by Oxford University Press in 2010. He has written over 80 case-reports for the Oxford Reports on International Criminal Law, as well as numerous book chapters on topics ranging from the principle of complementarity to Irish involvement in the drafting of the Geneva Conventions. In December 2010, he took over from Professor Carsten Stahn as Managing Editor of the peer-reviewed journal Criminal Law Forum. His research interests while focusing on IHL and ICL also include topics such as the history of international law and freedom of expression.
  • S. Darcy & J. Powderly (eds.), Judicial Creativity at the International Criminal Tribunals, (Oxford, Oxford University Press, December 2010)
  • J. Powderly, ‘Judicial Interpretational at the International Criminal Tribunals: Method from Chaos?’, in S. Darcy & J. Powderly (eds.), Judicial Creativity at the International Criminal Tribunals, (Oxford, Oxford University Press, December 2010)
  • J. Powderly, ‘The Eichmann, Barbie and Finta Trials’, in N. Bernaz & W. Schabas (eds.), The Routledge Handbook on International Criminal Law, (London, Routledge, November 2010) Irish Centre for Human Rights (W.A. Schabas, N. Prud’homme & J. Powderly), Crimes Against Humanity in Western Burma: The Situation of the Rohingya, (Irish Centre for Human Rights/ Irish Department of Foreign Affairs, June 2010). Available at:
  • M. Fairlie & J. Powderly, ‘Complementarity & Burden Allocation’, in C. Stahn & M. Al Zeidy, The International Criminal Court and Complementarity: From Theory to Practice, (Cambridge, Cambridge University Press, 2011 [forthcoming])
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Assistant Professor

Dr. Dov Jacobs
Dov Jacobs is an Assistant Professor in International Law at the Grotius Centre. Previously, he was a postdoctoral researcher at the University of Amsterdam, a PhD Researcher at the European University Institute in Florence and a lecturer in Public International Law at the University Roma Tre. He holds degrees in Law from King's College in London, Paris I Panthéon-Sorbonne and Paris II Panthéon Assas and a degree in Political Science from Sciences Po, Paris. He is currently a member of the editorial board of the Leiden Journal of International Law and the senior editor of international law of the European Journal of Legal Studies. Dov Jacobs regularly comments on international law issues on his blog, Spreading the Jam. He has published extensively in the field of international law and international criminal law. His current research interests cover international criminal law, public international law (particularly State Responsibility) and legal theory.

Programme Coordinator

Mette Léons, LL.M
Mette is the programme co-ordinator for the Master of Laws in Advanced Studies in Public International Law programme, and the LL.M. programme in Public International Law, which are offered at the Leiden Law school and at Campus The Hague of Leiden University. She is also the co-ordinator of the Telders International Law Moot Court Competition, which is held annually in April at the Peace Palace in The Hague. Mette Léons has an LL.M. degree in Dutch law from the University of Amsterdam. From 2006 until 2008, she worked as a project officer at the Grotius Centre and coordinated several training courses and the Summer School in International Criminal Law. Before joining the Grotius Centre, Mette Léons worked as a international coordinator and student advisor at the Department of Public Administration at Leiden University.

Assistant Professor

Jens M. Iverson
Jens Iverson is an Assistant Professor and a Researcher for the ‘Jus Post Bellum’ project and an attorney specializing in public international law. A member of the California Bar, the Thurston Society, and the Order of the Coif, he received his Juris Doctor cum laude from the University of California, Hastings, and his Bachelor of Arts from Yale University. He has worked extensively with the Cambodian Genocide Program, the Documentation Centre of Cambodia, and the Coalition for the International Criminal Court. Additionally, he has worked or consulted for the American NGO Coalition for the ICC, the Alameda County Public Defender, the Center for Gender and Refugee Studies, and the American Civil Liberties Union’s National Prison Project, as well as His Honor Judge Sterling Johnson Jr. of the Eastern District of New York. As the co-founder of a human rights clinic, he helped represent the former Prime Minister of Haiti in a successful petition to the Inter-American Commission on Human Rights which ultimately resulted in a landmark ruling requiring Haitian prison reform. He has practiced at the International Criminal Tribunal for the former Yugoslavia for over three years on both the Popović et al. and Prlić et al. cases.
Selected Publications
  • Eight Perspectives on Yvon Neptune v. Haiti, Hastings International and Comparative Law Review, Vol. 32, No. 2, Summer 2009.
  • The Continuing Functions of Article 98 of the Rome Statute, Goettingen Journal of International Law, Vol. 4, 2012, 131-151.
  • Transitional Justice, Jus Post Bellum and International Criminal Law: Differentiating the Usages, History and Dynamics, The International Journal of Transitional Justice, Vol. 7, 2013, 413–433; doi: 10.1093/ijtj/ijt019.
  • Revolution or Reform: Has Humanitarianism Established a New Legal Order? Should It? Leiden Journal of International Law, Vol. 27, 2014, 269-281; doi:10.1017/ S0922156513000733.
  • Contrasting the Normative and Historical Foundations of Transitional Justice and Jus Post Bellum: Outlining the Matrix of Definitions in Comparative Perspective, forthcoming in Jus Post Bellum, February 2014, Oxford University Press.
  • Exploring the Normative Foundations of Jus Post Bellum: An Introduction, with Jennifer Easterday and Carsten Stahn, forthcoming in Jus Post Bellum, February 2014, Oxford University Press.
  • Epilogue: Jus Post Bellum - Strategic Analysis and Future Directions, with Jennifer Easterday and Carsten Stahn, forthcoming in Jus Post Bellum, February 2014, Oxford University Press.

Project and Research Officer

Lieneke Louman LL.M. (Erasmus University Rotterdam)

Lieneke obtained her Master's degree in 2009 at the Erasmus University Rotterdam (EUR), specializing in International and European Public Law. She also followed some international law courses at the University of Technology Sydney (UTS), Australia in 2007. After graduating, Lieneke worked at the Ministry of Health, Welfare and Sport and did an internship at the Refugee and Migrant Rights Programme in Johannesburg, South Africa. She also worked as a Programme Manager at the International Criminal Law Network (ICLN). As a Project and Research Officer at the Grotius Centre, Lieneke organizes the ICC Moot Court Competition, the Jessup Qualifying Rounds, conferences and seminars, and other events.

Twitter: @iccmoot

Programme Assistant

Ioana Moraru

Ioana is a programme officer for the Grotius Centre for International Legal Studies, being part of the Telders Organizing Office and the Summer Schools Organization. Ioana graduated from The Hague University of Applied Sciences in June 2014 holding a LL.B in International and European Law with a specialization in International Criminal and Humanitarian Law.

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