Staff in The Hague

Prof. Carsten Stahn | Prof. Jaap de Hoop Scheffer | Kees WaaldijkProf. W.A. Shabas | Joseph PowderlyDov JacobsMette Léons | Martine Wierenga | Sara Kendall | Christian De VosJens M. Iverson | Jennifer Easterday | Arlinda Rrustemi | Astrid de Vries


Programme Director

Prof. Dr. Carsten Stahn
  • email:
  • tel.: 0031 (0) 646755775
  Carsten Stahn is 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.

Kooijmans chair for Peace, Law and Security

Prof. Jaap de Hoop Scheffer

  • email:
Jaap de Hoop Scheffer was a prominent government official, politician and diplomat. Until recently he was Secretary-General of NATO. Prior to this he was Foreign Minister, and chairman of the parliamentary party of the CDA. He studied Dutch Law at Leiden University. De Hoop Scheffer, who describes himself primarily as a "Professor trained in the day-to-day practice of international politics" will lecture on international relations and the practice of diplomacy. He will pay particular attention to the working of such organisations as the United Nations, the G20, the European Union and NATO.
Jaap de Hoop Scheffer is the first holder of the Kooijmans chair for Peace, Law and Security at Campus The Hague.


New chair in Comparative Sexual Orientation Law.

Prof. mr. C. Waaldijk

personal homepager:
tel.: +31 70 800 9593
Leiden University has appointed Dr. Kees Waaldijk to its new 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 will be based at the Leiden Law School’s Grotius Centre for International Legal Studies, at the Hague campus of Leiden University

The new professor has been active in the field of law and homosexuality already 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).
Read more.

Assistant Professor

Joseph Powderly

  • email:
  • tel.: +31 70 800 9366
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])

Assistant Professor 


Dov Jacobs
tel.: +31 (0)70 800 9518
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
tel.: +31 (0)70-800 9568 / +31 (0)71-527 4852
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.



Programme Officer

Martine Wierenga, LL.M
tel.: +31 (0)70 800 9578

Martine has an LL.M degree in Dutch Law from Maastricht University with a specialisation in European Legal Studies, which she obtained after having completed a year at the University of Westminster (London) and the Université de Bordeaux I. Prior to joining the Grotius Centre, Martine Wierenga worked at the Immigration Department of the Dutch Ministry of Justice, and practiced law at a Legal Aid Bureau, where she mostly dealt with Immigration Law and Labour Law cases. Her fields of interest include women’s rights and children’s rights. In that context she worked as an intern at the United Nations Committee on the Rights of the Child and the NGO Group for the Convention on the Rights of the Child. At the Grotius Centre Martine Wierenga coordinates and manages the summer programmes, including the Summer School on International Criminal Law, the Summer School on Human Rights and Transitional Justice and the Brandeis in The Hague Summer Program. She is also coordinating the Brandeis in The Hague Spring Semester in The Hague.





Dr. Sara Kendall
  • email:
  • tel.: 0031 (0)70 800 9524
Sara Kendall joined the Grotius Centre’s project on post-conflict justice and local ownership after receiving her PhD from the University of California at Berkeley in December of 2009 and teaching two courses there in the spring of 2010. In Berkeley’s interdisciplinary Rhetoric department she specialized in socio-legal studies and political theory, with further reading in the field of human rights and international humanitarian law. Her dissertation research centered on the Special Court for Sierra Leone, and it included a year of fieldwork in Sierra Leone monitoring and reporting on the work of the Court for UC Berkeley’s War Crimes Studies Center. She has co-authored publications for the War Crimes Studies Center assessing the practice and jurisprudence of the Special Court for Sierra Leone in addition to weekly reports on the trial proceedings. In her dissertation, entitled Contested Jurisdictions: Legitimacy and Governance at the Special Court for Sierra Leone, she examined the way in which this "hybrid” tribunal attempted to claim its legitimacy in the international legal order. While at the Grotius Centre she will work on assessing the extent to which International Criminal Court's judicial processes are responsive to the contexts in which it intervenes, focusing on ongoing situations in Uganda, Kenya and the Democratic Republic of Congo.

• 'Donors' Justice': Recasting International Criminal Accountability', 24(3) Leiden Journal of International Law (2011)
‘Seeing Justice Done: Outreach at the Special Court for Sierra Leone’ (with Alpha Sesay), Global Civil Society 2011: Globality and the Absence of Justice (Palgrave Macmillan)
• ‘Hybrid Justice at the Special Court for Sierra Leone’ (2010), 51 Studies in Law, Politics, and Society 1-29;
• Review of Antony Anghie, Imperialism, Sovereignty, and the Making of International Law (2008), 4-1 Journal of Law, Culture and the Humanities 119-122;
• Silencing Sexual Violence: Recent Developments in the CDF Case at the Special Court for Sierra Leone, (with Michelle Staggs, 2005) UC Berkeley War Crimes Studies Center;
• From Mandate to Legacy: the Special Court for Sierra Leone as a Model for "Hybrid Justice,” (with Michelle Staggs, 2005), UC Berkeley War Crimes Studies Center



Ph.D Researcher

Christian M. De Vos (external Ph.D researcher)

Christian is a PhD Researcher for the 'Post-Conflict Justice and Local Ownership' project and an attorney specializing in international law, human rights, and transitional justice. A graduate of the London School of Economics and Political Science (MSc, Theory and History of International Relations) and the American University Washington College of Law (J.D.), Christian has previously worked for the French section of Amnesty International Belgium and the Human Sciences Research Council in South Africa, and for the United States Institute of Peace’s Rule of Law Program and the War Crimes Research Office in Washington, D.C. In these capacities, he was responsible for projects related to the International Criminal Court and various international(ized) criminal tribunals, as well as the prosecution of serious crimes in post-conflict societies. Prior to joining the Grotius Centre, Christian completed a two-year clerkship with the United States Court of Appeals for the Second Circuit’s Office of Legal Affairs, where he worked on a variety of criminal and civil appeals and motions. As a consultant to the Open Society Justice Initiative, Christian works on projects related to the implementation by states of human rights decisions issued by the European Court of Human Rights and UN treaty bodies.
Selected Publications
  • 'Someone Who Comes Between One Person and Another': Lubanga, Local Cooperation and the Right to a Fair Trial, Melbourne Journal of International Law, Vol. 12, No. 1 (2011).
  • Implementation of Judgments: Making International and Regional Litigation Meaningful (with David Baluarte), Interights Bulletin 16.2 (Winter 2010).
  • From Judgment to Justice: Implementing International and Regional Human Rights Decisions (with David Baluarte), Open Society Justice Initiative (2010).
  • Judging Justice: Laws of War, Human Rights, and the Military Commissions Act of 2006, in R. Arnold and N. Quénivet (eds.), International Humanitarian Law and Human Rights Law: Towards a New Merger in International Law, Martinus Nijhoff (2008), 499-523.
  • Mind the Gap: Purpose, Pain, and the Difference Between Torture and Inhuman Treatment, Human Rights Brief, Vol. 14, No. 2 (2007), 4-10 (reproduced in Anti-Terrorism and Criminal Enforcement, Norman Abrams ed., West Group (2008)).
  • What Price Truth? South Africa's Truth and Reconciliation Commission in Critical Perspective, Politikon - South Africa Journal of Political Studies, Vol. 29, No. 2 (2002), 209-223.

Ph.D. Researcher

Jens M. Iverson
  • email:
  • tel.: 0031 (0)70 800 9358
Jens Iverson is 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 4 (2012) 1, 131-151


Jennifer Easterday , J.D. (University of California, Berkeley), B.A. (University of California, San Diego)

  • E-mail:
  • Tel: 070-800 9526
Jennifer Easterday is a Researcher for the ‘Jus Post Bellum’ project. She previously worked for International Criminal Law Services, an NGO based in The Hague, on a variety of international criminal law projects including drafting training materials tailored to the Balkans region as part of any OSCE/ODIHR – ICTY legacy project, funded by the EC. She also worked on various international criminal law capacity building projects in Uganda and Rwanda, and other projects related to international criminal justice. She has also worked as a Senior Research and Trial Monitor for the UC Berkeley War Crimes Studies Center (WCSC), researching and monitoring the Special Court for Sierra Leone trial of Charles Taylor and developing projects related to trial monitoring at other international and hybrid tribunals. She has experience at the ICTY and with other international criminal law and human rights NGOs in the United States and Latin America, including serving as a consultant for the Open Society Justice Initiative. She received her JD from the University of California, Berkeley School of Law and is a member of the California State Bar.


Arlinda Rrustemi, LL.M

  • E-mail:
  • Tel: 0031 (0)70 800 9521
Arlinda Rrustemi born on 18.04.1988 in Pristina, Kosovo. She is a lecturer and researcher at Leiden University, and also a research assistant to Prof. Jaap de Hoop Scheffer. She is involved in courses taught at the Advanced LL.M. programme in Public International Law and at Leiden University College. She holds a B.A. (cum laude) from the Roosevelt Academy and an LL.M. degree in Public International Law from Utrecht University. Arlinda is pursuing a doctoral degree in the interdisciplinary research of law and politics called "State-Building through Life Stories: Incorporating Local Perspectives”, supported by the Netherlands Organization for Scientific Research (NWO). She has previously worked as a project intern at the Youth Initiative for Human Rights (YIHR) in Kosovo, as a legal intern at the International Tribunal for the former Yugoslavia (ICTY), as an external relations intern at the International Criminal Court (ICC) and as intern at various Ministries in the Republic of Kosovo. Her research interests are in post-conflict state building, the accountability of international organizations, international relations and diplomacy.

A.Rrustemi. 2010, 'The ICC's First Decade: the Role of the Netherlands and Canada in the First Permanent International Criminal Court', in C. Steenman Marcusse & C. Verduyn (eds.), Tulips and Maple Leaves in 2010: Perspectives on 65 Years of Dutch-Canadian Relations, Barkhuis: Groningen.



Office Manager

Astrid de Vries


tel: +31 (0)70 800 9575

Astrid is the Office Manager for the Grotius Centre for International Legal Studies. Previously Astrid worked for the Coalition for the International Criminal Court, Women's Initiatives for Gender Justice and Fédération Internationale des Ligues des Droits de l'Homme (FIDH). At the Grotius Centre Astrid manages the  secretariat and gives general support to the team of the Grotius Centre.


To Top 






Calendar of EventsPost-Conflict JusticeGrotius PhD TrackAdvanced LLM Summer School ProgrammesLeiden Law SchoolSystematic Sexual Violence and Victims' RightsVisiting (PhD) ResearchersSupranational Criminal Law Lecture Series - Lectures in Honour of Judge Antonio CasseseGrotius DialoguesKalshoven-Gieskes Forum on International Humanitarian Law