Isabella Seif


Isabella is an Australian solicitor. She holds a BA and an LLB from the University of Sydney and an LLM in Public International Law from the University of Paris 2 (Université de Paris 2 Panthéon-Assas). She also studied International Law at the Institut d’Études Politiques de Paris (Sciences Po), the University of Cambridge and the China University of Political Science and Law.

Isabella advises governments and private clients on a wide range of contentious and non-contentious public international law and international dispute resolution issues. Recent highlights of her practice include advising a State in the Far East on its obligations under UNCLOS and customary international law vis-à-vis a neighbouring State in relation to the use of territorial waters and seabed close to an international boundary, advising a State on sovereign immunity issues arising out of an employment relationship in a receiving State, and advising a private entity in relation to an investment dispute with an Asian State.

Prior to joining us, Isabella worked as a lawyer for the British Government in the Missing Trader Intra-Community Fraud Litigation Department. She also worked in the International Arbitration Group of a global law firm in Paris where she represented States and private clients in both ICC and ICSID arbitrations. She has worked for the Secretariat of the ICC International Court of Arbitration in Paris, assisting in the case management of ICC arbitrations. Before that, she worked at the Australian Human Rights Commission and the United Nations Department of Economics and Social Affairs.



LLM, Université de Paris 2 Panthéon-Assas, France

LLB, University of Sydney, Australia

BA, University of Sydney, Australia


English and French

Bar admissions

New South Wales, England and Wales