Sebastián Green Martínez

Sebastián Green Martínez is a Managing Associate at Uría Menendez SLP in Madrid, where he has practiced international and investment arbitration since September 2018. His responsibilities include representing investors and States, presenting oral and written submissions before arbitration tribunals, conducting cross-examinations of witnesses and experts, among others. 

Before this, he served as Counsel at the Directorate of International Affairs and Disputes of Argentina's Treasury Attorney’s Office from 2013 to 2017, participating in multiple ICSID and UNCITRAL investment arbitration cases. He has also served as an assistant to the Hon. Charles Brower in the context of investment arbitrations.

He joined the Faculty of Law at Universidad Francisco Marroquín as an Associate Professor in August 2024 and also coached the Philip C. Jessup International Law Moot Court team at Universidad Autónoma de Madrid and at Universidad de Buenos Aires. He was a faculty member teaching international law at the University of Buenos Aires between 2012 and 2017. His scholarly contributions include co-authoring the forthcoming “Jurisdictional Objections in ICSID Arbitration” (Edward Elgar, 2026), along with numerous peer-reviewed articles and presentations delivered at several fora. He is also a member of pools of arbitrators in various jurisdictions.

Academic Interests: International Dispute Resolution; International Investment Law; International Cultural Heritage Law; International Criminal Law; Arbitration; History of International Law.

Awards and recognition: Fulbright Scholarship for Master's Studies in the United States; Buergenthal Scholarship (George Washington University); Thelma Weaver Memorial Award (George Washington University); Scholarship for Master's Studies and Master's Thesis Development (University of Buenos Aires); Scholarship for the Study of United States Institutions for Young Leaders (Fulbright Commission); Coach of the world champion team in the international rounds of the Philip C. Jessup International Law Moot Court Competition 2016.

Corporate Experience

• Managing Associate, Uría Menendez SLP, Spain, Sep. 2018–Present 
• Assistant to the Hon. Charles Brower, George Washington University, United States, Aug. 2017-April 2018
• Counsel, National Directorate of International Affairs and Disputes - Argentine Treasury Attorney General’s Office, Argentina, May 2013–July 2017
• Legal Advisor, Ministry of Economic Development of the City of Buenos Aires, Argentina, Nov 2011–May 2013

Academic Experience

• Adjunct Professor of International Arbitration, Universidad Francisco Marroquín, Spain, 2024-Present
• Lecturer of Public International Law - coach of Jessup International Law Moot Court Competition, Universidad Autónoma de Madrid, Spain, June 2024-March 2025
• Lecturer of International Economic Law, Master’s Program in International Advocacy of Universidad Carlos III, Spain, Nov. 2019-Nov. 2023
• Thesis Director, UNIR, Spain, Nov 2021-Nov 2023
• Adjunct Professor of Public International Law, Universidad de Buenos Aires, Argentina, Aug. 2016-Aug. 2017.
• Adjunctre Professor of Public International Law, Universidad de Buenos Aires, Argentina, June 2012-Aug. 2016.

Academic Background

• LLM in International and Comparative Law, The George Washington University, School of Law, United States, 2018
• MA in International Relations, Universidad de Buenos Aires, Argentina, 2017
• Law Degree, Universidad de Buenos Aires, Argentina, 2011