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Jann Kleffner

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Prof. Dr. Jann K. Kleffner LL.M. is Professor of International Law at the Swedish Defence University, Extraordinary Professor at the Faculty of Law of the University of Pretoria, South Africa, and Senior Fellow at Melbourne Law School, Australia. His research is on public international law, with a special focus on the international law of military operations, including the law of armed conflict and peace operations, jus ad bellum, international criminal law, and human rights law. He has published widely in these fields (more than 90 publications).
After studies in Germany, the UK and The Netherlands, Jann K. Kleffner obtained LL.M. and PhD degrees in international law from the University of Amsterdam Law School in The Netherlands. Prior to joining the Swedish Defence University, he was Assistant Professor of International Law and Deputy Programme leader of the research programme on 'The Role of Law in Armed Conflict and Peace Operations', at the University of Amsterdam. Professor Kleffner has been a fellow of the Geneva Academy of International Humanitarian Law and Human Rights, the Institute for International and Comparative Law in Africa at the University of Pretoria, and of DePaul University Law School, Chicago, USA.
Professor Kleffner has served as expert and consultant for a number of states and inter-governmental and non-governmental organisations, including the United Nations, the International Committee of the Red Cross, the International Criminal Court, the International Criminal Tribunal for the Former Yugoslavia and the International Law Association. He has also advised law firms in the areas of the law of armed conflict and international criminal law, in addition to fulfilling a number of editorial functions. Between 2010-2020 he served as Head of the Centre of International and Operational Law at the Swedish Defense University.

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