Greg Lourie’s practice focuses on international arbitration and litigation, and public international law matters.

Greg represents sovereigns and investors in investor-state and inter-state disputes before various arbitral institutions and courts. He has also experience in advising clients on human rights matters, as well as on issues of sovereign and diplomatic immunities and international trade.

Greg joined the firm in 2018.

Notable Experience

  • The Republic of Tatarstan and its Ministry of Land and Property Relations in an ongoing UNCITRAL arbitration against Ukraine under the Russia-Ukraine bilateral investment treaty. The claims arise out of a raider takeover of one of the largest refineries in Ukraine, which before the raid was controlled by Tatarstan interests.

  • The Russian Federation in relation to the successful first instance grant of summary judgment to the Bond Trustee in a case against Ukraine for repayment of a US$3 billion Eurobond issued by Ukraine and held by the Ministry of Finance of the Russian Federation.

  • The Government of Georgia in relation to a construction-related dispute under the UNCITRAL Arbitration Rules.

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Selected Activities

  • Lecturer at Saarland University, Saarbrücken (International Arbitration and Public International Law)
  • Member of the Academic Council of the Belarusian International Law & Arbitration Association
  • Member of the German Society of International Law (German Branch of the ILA)
  • Member of DIS40, ICC YAF, RAA40, Young ICSID, Young OGEMID


Cybersecurity, International Arbitration and the Ethical Rules and Obligations Governing the Conduct of Lawyers: A Comparative Analysis,” TDM 3 (2019) (with S. Alekhin and A. Foucard)

The BGH’s Achmea Decision: Arbitration Clauses in ‘Intra-EU BITs’ Are Invalid,” Cleary Gottlieb Alert Memo, November 30, 2018

“Investitionsschutzverträge in Zeiten der Abkehr vom völkervertragsrechtlichen Investitionsschutz,” Versicherungsmechanismen im Recht (Behme/Fries/Stark, eds., 2016)

Diplomatic Protection Under the State-to-State Arbitration Clauses of Investment Treaties,” Austrian Yearbook on International Arbitration (Klausegger et al., eds., 2015)


FDI Moot Court, coach of the University of Saarbrücken student team, November 10, 2019

International Institutional Arbitration, Lecture at the International Training Centre of the ILO (ITCILO), Torino, May 17, 2019

The Russian Approach to the ISDS Reform, Workshop on Current Developments in the Reform Debate on Investor State Dispute Settlement, Europainstitut Saarbrücken, May 7, 2019

Can States Reshape Their Investment Treaties Through Subsequent Agreements and State to State Arbitration?, Panel Discussion at NLU Delhi, October 2, 2017

Exploring the Varying Dimensions of Public Policy in International Arbitration, 2nd CARTAL Conference on International Arbitration, Judhpur, September 30, 2017

17. Graduiertentreffen im Internationalen Wirtschaftsrecht: Internationale Abkommen im Wirtschaftsrecht, Conference Host, Goethe University Frankfurt, June 11-12, 2016