Mr Callum Musto

School of Law

Lecturer in International Trade Law

LAW Callum Musto

Full contact details

Mr Callum Musto
School of Law
Bartolomé House
Winter Street
S3 7ND

I joined the School of Law as Lecturer in September 2020. Before coming to Sheffield, I worked toward my PhD at the London School of Economics and Political Science.

I have previously taught public international law and EU law at the LSE, public international law at the University of Oxford, EU law at the University of Buckingham, and public law and international law of the sea at the Australian National University.

In 2017/18 I was Judicial Fellow to His Excellency Judge Giorgio Gaja at the International Court of Justice in the Hague. I am admitted as a Lawyer in the Supreme Court of the Australian Capital Territory and previously worked in several roles in the Australian federal court system. I have also been involved in numerous research projects on international law with the British Institute of International and Comparative Law, the British Institute of International Affairs (Chatham House), and Oxford Pro Bono Publico.

  • PhD (expected), London School of Economics
  • MPhil, BCL (Dist), University of Oxford
  • GDLP, LLB (Hons I) / BA (Int’l Rel, Hist), Australian National University
  • Lawyer, Supreme Court of the Australian Capital Territory
Research interests

As a generalist public international lawyer, my interests and expertise span a range of topics, including sources of international law, treaty interpretation, international dispute settlement, environmental law, and the law of the sea.

My research currently centres on topics in international economic law, particularly international trade law and international law concerning foreign investment. I am particularly interested in the capacity of existing rules and institutions to permit and promote social and environmental justice. My doctoral research addresses approaches to rule ascertainment and interpretation in international investment arbitration, States’ regulatory powers, and the reconceptualization of investment law as a form of ‘international public law’.


Journal articles

  • Apostolaki M, Methymaki E, Musto C & Tzanakopoulos A (2019) United Kingdom Materials on International Law 2016. British Year Book of International Law, 361-746. RIS download Bibtex download
  • Musto C & Redgwell C (2017) United States — Shrimp. RIS download Bibtex download


  • Musto C & Tzanakopoulos A (2020) The ICJ and “progressive causes” In Skordas A (Ed.), Research Handbook on the International Court of Justice View this article in WRRO RIS download Bibtex download
  • Musto C & Redgwell C (2017) US—Import Prohibition of Certain Shrimp and Shrimp Products (1998) In Bjorge E & Miles C (Ed.), Landmark Cases in Public International Law (pp. 489-508). Hart View this article in WRRO RIS download Bibtex download


  • Anderson DH, Barrett J, Burke N, Churchill R, Musto C, Nishimoto K & Seta M (2016) Obligations of States under Articles 74(3) and 83(3) of UNCLOS in respect of Undelimited Maritime Areas RIS download Bibtex download

Website content

  • Musto C New Restrictions on Arbitral Appointments for Sitting ICJ Judges. RIS download Bibtex download
Teaching interests

International law is a fascinating, challenging, and incredibly diverse field.

My teaching strategy is built around student engagement, active participation, and problem-based learning. My aim is to encourage my students to understand how the law operates in theory, and how it is used and operates in practice, to equip them with the knowledge and tools to subject the law and legal processes to critical reflection.

I often draw on my research and my practical experience in international dispute settlement when designing activities — encouraging my students to assess the causes of, and find solutions for, contemporary challenges in international law and legal practice.

I am committed to helping to ensure the School remains an inclusive and supportive learning environment and to do my upmost to support my students during their time at Sheffield.

Teaching activities


  • LAW323 International Trade Law (Convenor)
  • LAW215 Foundations of International Law
  • LAW333 Advanced Issues in International Law


  • LAW60053 WTO Law: Foundations, Institutions and Challenges
  • LAW6159 Trade Remedies in WTO Law
  • LAW6179 Core Issues in International Dispute Settlement
Professional activities


  • British Branch, International Law Association
  • Society of Legal Scholars
  • European Society of International Law
  • Society of International Economic Law

Co-editor, British Yearbook of International Law, ‘UK Materials on International Law’ (2016-)