Alexis Martinez
Partner
Alexis is a Partner in the Dispute Resolution group.
Multilingual and dual-qualified, Alexis excels in large-scale multi-jurisdictional disputes.
Alexis is qualified in both England and France and has unparalleled experience working on investment treaty and energy arbitrations in English, Spanish and French.
Alexis’s recent energy arbitration successes involve the payment of hundreds of millions of US$ to clients in several pricing disputes under long-term natural gas and LNG contracts. His commercial arbitration practice encompasses complex energy, construction, mining and financial disputes.
Highlights of Alexis’ investment treaty arbitration experience involve the successful representation in multiple cases of Slovakia, Ecuador, the Czech Republic, Turkey, Uzbekistan and other states. He has also acted for claimants against states in 11 cases in Latin America, Africa, Asia and the Caribbean, all of which resulted in favourable multimillion awards or settlements.
He has extensive experience advising sovereigns and international companies on public international law issues, such as the extent and international impact of sovereign rights, international sanctions and the application of international treaties.
Alexis also regularly acts as arbitrator.
He has been recommended as a leader in his field for many years. He has been recognised every year since 2017 as a ‘Future Leader’ by Lexology Index: Arbitration (formerly Who’s Who Legal). Alexis has also been recommended for international arbitration by The Legal 500 every year since 2016.
Legal 500 UK 2025 notes that Alexis “excels in arbitration and dispute resolution, offering practical and reliable solutions”.
- Acting for a European LNG buyer in an ICC arbitration arising from a long-term multibillion-dollar LNG supply contract, which led to a successful settlement.
- Advising an Asian LNG buyer on the development of an arbitration strategy, leading to the successful renegotiation of price and non-price term on a multibillion-dollar long-term LNG supply contract.
- Acting for a JV of three global engineering, procurement and construction companies in a construction and scheduling arbitration with sums in dispute exceeding US$4.5bn.
- Acting for the Slovak Republic in Spółdzielnia Pracy Muszynianka v. Slovak Republic, PCA Case Nº AA629, a treaty arbitration governed by the UNCITRAL Rules and the Poland – Slovak Republic BIT in connection to alleged rights to water natural resources, resulting in a successful award for the Slovak Republic.
- Acting for the Slovak Republic in EuroGas Inc. and Belmont Resources Inc. v. Slovak Republic, ICSID Case No. ARB/14/14, an ICSID dispute under the US – Slovak Republic and Canada – Slovak Republic BITs in connection with the withdrawal of a mining license, valued over US$1 billion, leading to a complete victory for the Slovak Republic.
Education
- 2023 · European University Institute and Harvard Law School, Summer School on Law & Logic
- 2007 · Admitted as a Solicitor of England & Wales
- 2004 · Admitted as Avocat at the Paris Bar
- 2002 · Panthéon-Assas University, DEA, Droit des Relations Economiques Internationales
- 2001 · Panthéon-Assas University, Maitrise en Droit
- 2001 · University College London, Diploma, English Law,
- 2000 · Panthéon-Assas University, Licence en Droit
memberships and associations
- Member, Study Group on the Practice and Procedure of International Tribunals, International Law Association
- Member, LCIA, The London Court of International Arbitration
- Member, YAG, The Association Suisse d’Arbitrage
- Member, YAF, The International Chamber of Commerce
- Member, Young & International, ICDR
- Member, Club Español del Arbitraje
- Member, The Moot Alumni Association
- ArticleUK Supreme Court grants final anti-suit injunction to terminate Russian proceedings in breach of arbitration agreement
- ArticleHow investors can protect their international projects from resource nationalism and windfall taxes
- ArticleInvestor-State Update: ICSID Annulment in Almasryia v. Kuwait Holds Lessons for Hotel and Hospitality Investors
- ArticleInvestment changes coming to ASEAN-Australia-New Zealand free trade agreement
- ArticleUK Accession to the CPTPP (Part 2): Key lessons for other Accession Candidates
- External publicationAssistant editor, UCIA – Universal Citation in International Arbitration, Law Business Research Ltd., January 2023.
- External publicationChapter on "Australia", Guide to Arbitration Places (GAP), DELOS, 2024.
- External publicationGreen Light: Russia Grants The ICC And SIAC The Status Required To Administer International Commercial Arbitrations In The Country, Mealey’s International Arbitration Report, January 2022.
- External publicationArbitration of M&A Transactions: A Practical Global Guide, 2nd edn, by Edward Poulton, 37 Arbitration International, 2021.
- External publicationTo Our Friend Martin (MI), Kluwer Arbitration Blog, 18 October 2021.
- External publicationChapter on “Cost of Proceedings”, The ICSID Convention, Regulations and Rules: A Practical Commentary, Edward Elgar, 2019.
- External publicationEmergency Arbitration: Common Rules, Variations, and Challenges, 197 ICA Arbitration Quarterly 2, April-June 2018.
- External publicationArbitration in Africa: Past, Present, and Future, Kluwer Arbitration Blog, 13 January 2016.
- External publicationA Modest Proposal for Preventing Multipartite Arbitrations from Being a Burden to the Parties and for Making Them Beneficial to the Parties, 5 Am. U. Bus. L. Rev. 355, 2015-2016.
- External publicationLe Pouvoir d’Intervention des Juridictions Indiennes dans l’Arbitrage, 1 Cahiers de l’Arbitrage 9 (2013).
- External publicationThe International Chamber of Commerce's Note on the Appointment, Duties and Remuneration of Administrative Secretaries, 6 Int'l Arbitration Law Rev 50 (2012).
- External publicationResource nationalism: Protecting Investor's rights, Mining Journal, 2 March 2012.
- External publicationDallah, a Tale of Two Judicatures, 4 Int'l Arbitration Law Rev 4 (2011).
- External publicationReform of French Arbitration Law, Practical Law Company, 1 March 2011.
- External publicationChanges to the VAT Treatment of Arbitration Services in the EU, 7-1 TDM, 2010.
- External publicationChapter on Invoking State Defences, in The Backlash Against Investment Arbitration, Kluwer, 2009.
- External publicationChapter on Investment Arbitration, in International Arbitration Checklists, Juris, 2009.
- External publicationAnalysing The Growth Of Islamic Law In International Arbitration And Dispute Resolution, 24-1 Mealey's Intl. Arb. Rep. 20 (2009).
- External publicationIs Invoking State Defences In Investment Arbitration A Waste Of Time And Money?, 15 Croatian Arbitration Yearbook 89 (2008).
- External publicationNoble Energy Inc & MachalaPower Cia Ltda v. Ecuador & Consejo Nacional de Electricidad Case Report, 23-9 Mealey's Intl. Arb. Rep. 16 (2008