Mads Andenas is Professor of Law at the University of Oslo and the Director of the Centre for Corporate and Financial Law at the Institute of Advanced Legal Studies, the School of Advanced Study, University of London. He was the Director of the British Institute of International and Comparative Law, London and Director of the Centre of European Law at King’s College, University of London and a Visiting Research Fellow of the Institute of European and Comparative Law, University of Oxford.

He has been a visiting professor at University of Rome La Sapienza since 2002, and was a visiting professor at University of Paris I (Sorbonne) in 2006 and at l'École normale supérieure, Paris in 2008, and has also held the Chaire W J Ganshof van der Meersch under the Fondation Philippe Wiener—Maurice Anspach at the Université Libre de Bruxelles, the Chaire Vincent Wright at Sciences-Po, Paris in 2012, and the Paul Hastings Visiting Professorship at the Faculty of Law at the University of Hong Kong in 2005. In 2016 he was a Visiting Fellow at All Souls College, University of Oxford.

He has been the General Editor of the International and Comparative Law Quarterly (Oxford University Press, then Cambridge University Press). He is currently the General Editor of European Business Law Review and an Editor of European Public Law (both Kluwer Law International) and on the editorial boards of some ten other law journals and book series, including as member of the Advisory Committee of Peking University Law Journal.

He was the Secretary General of the Fédération internationale de droit européen 2000-2002, the Hon Secretary of the UK Association of European Law 1997-2008 and the Hon Secretary of the UK Committee of Comparative Law 1999-2005. He was the Chair, Association of Human Rights Institutes (AHRI) in 2008, and has been a member of the International Law Association's Securities Law Committee since 1996.

His current project builds on M Andenas, ‘Reassertion and Transformation: from fragmentation to convergence in international law’ (2015) Georgetown Journal of International Law 685–734 and M Andenas and E Bjorge, A Farewell to Fragmentation – Reassertion and Convergence in International Law, Cambridge University Press 2015.