Marc Weller is Professor of International Law and International Constitutional Studies in the University of Cambridge and the former Director of the Lauterpacht Centre for International Law.

He also served as Deputy Director of the Centre of International Studies in the University, and for close to a decade as Director of the European Centre for Minority Issues – a governmentally established expert institution addressing ethnic conflict. In addition, he served as Senior United Nations Mediation Expert, addressing a large number of conflicts around the globe. He served as senior legal advisor in a number of significant peace processes and worked with Kofi Annan, Lakhdar Brahimi, Jamal Benomar and several other senior figures in that role.

Professor Weller holds Masters degrees from the Fletcher School and the University of Cambridge, and doctorates in law, economic and social sciences, and in international relations from the universities of Frankfurt, Hamburg and Cambridge respectively. He was awarded the Halbsury Legal Award and the Jus Gentian Prize in International law, along with other honours. He has authored, edited or co-edited in excess of 25 books, addressing international law, the use of force, self-determination and human rights, and international peace-making. His latest co-edited book is International Law and Peace- settlements to be published by Cambridge University Press in 2021.