Dr. Juan Pablo Pérez-León-Acevedo is a researcher (guest researcher) at PluriCourts (Centre for the Study of the Legitimate Roles of the Judiciary in the Global Order, Norwegian Research Council Project 223274), Faculty of Law, University of Oslo (Norway) where he was previously a post-doctoral research fellow. He is also a visiting professor of international law at the Faculty of Law and Humanities of Technological University of Peru. He has served in diverse capacities at inter alia: Åbo Akademi University Institute for Human Rights, Centre for Human Rights of Pretoria University, International Criminal Court, International Criminal Tribunal for the Former Yugoslavia, International Tribunal for the Law of the Sea, United Nations, and Ministry for Foreign Affairs of Peru.