Maria Fogdestam-Agius


Maria is a Swedish attorney. She holds a Master of Laws in Public International Law and Procedural Law and a Doctor of Laws in Public International Law, both from Uppsala University. Her expertise covers a wide array of public international law topics, including the law of treaties, the law on State responsibility, WTO law, international investment law, the law of the sea, international environmental law and Business & Human Rights.

Maria advises and represents States and private entities on a wide range of contentious and non-contentious public international law and international dispute resolution issues.

Recent highlights of her public international law practice include advising a State in proceedings before the International Court of Justice in relation to disputes with a neighbouring State; advising a State client in inter-State complaint proceedings before a human rights treaty body; advising a number of States on issues relating to sovereign and diplomatic immunities, including the inviolability of diplomatic premises; advising a number of States on issues relating to the international use of force, military intervention, the law of armed conflict, international criminal law and the application of human rights in disputed territory; and advising a State on issues relating to maritime boundary and territorial sovereignty claims.

In the field of international investment arbitration, Maria has acted, inter alia, for an African State in an ICSID dispute relating to the oil industry; for an Arab State in an ICSID dispute involving claims alleging human rights violations; and for a private investor in annulment proceedings against a Latin American State.

Her work in the field of Business & Human Rights includes advising a development finance institution on its responsibilities under the United Nations Guiding Principles on Business and Human Rights and advising a corporate entity on auditing its compliance with the Voluntary Principles on Security and Human Rights.

Maria is published in the field of public international law, including as the author of a comprehensive monograph. Prior to joining Volterra Fietta, Maria worked as a post-doctoral researcher and teaching assistant of public international law at Uppsala University. She also tutored students in international litigation advocacy. Prior to that, she worked as a judicial clerk and junior judge in a Swedish district court. She has also interned at the International Criminal Court in The Hague.

Direct dial: +44 (0)207 380 3533



LLD, Uppsala University, Sweden

LLM, Uppsala University, Sweden


English, Swedish and French

Bar admissions

Sweden, Registered European Lawyer (UK)