Margaretha Wewerinke-Singh

Margaretha Wewerinke-Singh is an Associate Professor of Sustainability Law at the University of Amsterdam and Adjunct Professor of Law at the University of Fiji. She practices at Blue Ocean Law, a boutique international law firm specialised in human rights and environmental justice based in Guam. She is also a Member of the Permanent Court of Arbitration.

Margaretha’s research and publications, including her book ‘State Responsibility, Climate Change and Human Rights under International Law’ (Hart Publishing 2019), have contributed significantly to the field of international law and climate justice. Forthoming work includes Mobilising Rights for Climate Justice (with Sébastien Jodoin) on the practice and impact of rights-based climate litigation, and the Cambridge Handbook on Climate Change Litigation (edited with Sarah Mead), providing an overview of emerging best practice in climate litigation globally.

Margaretha’s research builds on two decades of experience participating in international climate negotiations and related processes, advising and representing governments, NGOs and UN bodies. She has also advised on numerous climate litigation cases. Currently, she serves as lead counsel for the Republic of Vanuatu in climate change advisory proceedings before the International Court of Justice and the Inter-American Court of Human Rights, leading a diverse team at Blue Ocean Law alongside Julian Aguon. She also chairs the Loss and Damage Subcommittee of the Commission of Small Island States on Climate Change and International Law (COSIS) and served as counsel for COSIS in the advisory proceedings on climate change before the International Tribunal for the Law of the Sea.