Jack undertook his DPhil in public international law at the University of Oxford, submitting his doctoral thesis, The principle of sovereignty and state cyber operations, in 2022. His thesis was supervised by Professor Catherine Redgwell and Dr. Efthymios Papastavridis and supported by UKRI funding. Having successfully defended his thesis, Jack accepted the position of Research Fellow in International Law at the British Institute of International and Comparative Law and is a Post-Doctoral Research Fellow at the Hebrew University of Jerusalem. He holds an LL.B degree in Law with European Study and an LL.M degree in International and European Law. Prior to commencing his doctorate, he held the post of Research Assistant with teaching responsibilities at the Institute for Public International Law, University of Bonn. Jack has several years of research experience including positions at Chatham House, the British Institute of International and Comparative Law, and the Amsterdam Centre for International Law. Jack has worked on cases involving issues of international and EU law. His current research interests include the relationship between customary international law and treaty law, state responsibility, use of force, and the applicability of these frameworks to new and emerging areas governed by international law such as cyber operations.