Prof. Christian Tams

Christian J. Tams is Professor of International Law at the University of Glasgow and at Sorbonne Law School in Paris. He serves as Vice-President of the European Society of International Law.

Christian’s practice focuses on international litigation and arbitration. He has represented States in proceedings before international courts and tribunals such as the ICJ and ITLOS, acted in arbitral proceedings under the main frameworks of investment arbitration (ICSID, ICC, UNCITRAL), and provided expert advice in domestic proceedings involving questions of international law.

In addition to contentious matters, Christian advises States and non-State actors on a wide range of legal questions, among them the scope of sovereign immunities, the enforcement of international awards and the impact of sanctions.

International Law

Christian’s practice focuses on international litigation and arbitration.  Representative cases include:

International Court of Justice

  • Questions of Jurisdictional Immunities of the State (Germany v. Italy) (counsel to claimant)
  • Arbitral Award of 3 October 1899 (Guyana v. Venezuela) (counsel to respondent)
  • Allegations of Genocide (Ukraine v. Russia) (counsel to Lithuania, intervening)
  • Application of the Genocide Convention (The Gambia v. Myanmar) (advisor to interveners)
  • Maritime Delimitation in the Indian Ocean (Somalia v. Kenya) (counsel to respondent)
  • Prevention and Punishment of the Crime of Genocide (Croatia v. Serbia) (counsel to respondent)
  • Elimination of All Forms of Racial Discrimination (Georgia v. Russia) (advisor to respondent)
  • Prevention and Punishment of the Crime of Genocide (Bosnia v. Serbia) (advisor to respondent)


Investment arbitration

  • DSC v. Libya (PCA Case No. 2017-21) (counsel to respondent)
  • Scholz v Morocco (ICSID Case ARB/19/2) (party-appointed expert)
  • Trasta v. Libya (PCA Case 2020/09) (counsel to respondent)
  • Etrak Libya (ICC Case 22236/AY) (counsel to respondent)
  • UAB v. Latvia (ICSID CaseARB/12/33) (party-appointed expert in enforcement proceedings)
  • Deripaska v Montenegro (PCA Case 2017-07) (party-appointed expert)
  • Dagher Sudan (ICSID Case ARB/14/2) (counsel to respondent)
  • HSY v. Greece (ICC Case 18675/GZ/MHM/AGF) (party-appointed expert)



  • Land Reclamation (Malaysia v. Singapore, ITLOS) (counsel to claimant)
  • Cases B1 and A15 (Iran v. United States, Iran-US Claims tribunal) (counsel to claimant)
  • Expert advice in domestic proceedings, e.g. before courts in Portugal, Belgium, Sweden and as amicus curiae before the US Supreme Court in Philipps v. Germany.

Principal publications

International Investment Law and General International Law (with Hofmann and Schill), Elgar 2023 (416 pp.);

The Settlement of Disputes under International Law. Basic Documents (2nd edn, with Tzanakopoulos), Bloomsbury 2022 (996 pp.);

Les inspections internationales/International Inspections (with Chaumette) Brill, Hague Academy of International Law (629 pp.);

The Statute of the International Court of Justice (3rd edn, with Zimmermann), OUP 2019 (1980 pp.);

Self-Defence against Non-State Actors (with O’Connell and Tladi), CUP 2019 (272 pp.);

International Investment Law and History (with Schill and Hofmann), Elgar 2018 (384 pp.);

International Investment Law and the Global Financial Architecture (with Schill and Hofmann), Elgar 2017 (347 pp.);

Research Handbook on the Law of Treaties (with Tzanakopoulos and Zimmermann), Elgar 2014 (680 pp.);

The Development of International Law by the International Court of Justice (with Sloan), OUP 2013 (415 pp.);

The United Nations Convention on Jurisdictional Immunities of States and Their Property (with O’Keefe), OUP 2013 (550 pp.);

Legacies of the Permanent Court of International Justice (with Fitzmaurice), Brill/Nijhoff 2013 (440 pp.);

Enforcing Obligations Erga Omnes in International Law. Cambridge Studies in International and Comparative Law (CUP) (359 pp.), first published in 2005, revised paperback edn. 2010.


Current Academic Positions

Professor of International Law at the University of Glasgow (since 2008)

Director of the Glasgow Centre of International Law and Security (established in 2019).

Professor of international law at Sorbonne Law School (Université Paris 1 – Panthéon Sorbonne)

Professor of International Law and Dispute Resolution, Leuphana University, Lüneburg (Germany)

Vice-President of the European Society of International Law

Council member, German Society of International Law

Member, ILA Committee on the Use of Force

Public Appointments

Member of the scientific advisory board of the German Ministry for Foreign Affairs

Member of the appointment committee of the German Court of Arbitration for Sport.


Regulatory Information

All members of Chambers are registered with the Bar Stardards Board of England and Wales. For general terms and conditions on which services are provided - click here

Professional title: Barrister

Full name (as registered with Bar Standards Board of England and Wales): Prof. Christian Tams

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Legal Status: Sole Practitioner

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