Esteban A. Leccese
Of Counsel

Pennzoil Place—South Tower
711 Louisiana, Suite 2150
Houston, TX 77002
P: 713.860.1600

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Esteban Leccese’s practice includes advising clients regarding their investment claims in arbitration proceedings under the rules of major arbitration institutions such as the International Centre for Settlement of Investment Disputes (ICSID) and the International Chamber of Commerce (ICC), and ad hoc arbitrations under the United Nations Commission on International Trade Law (UNCITRAL) Arbitration Rules. His practice also includes advising on commercial arbitration under several arbitration rules.  He has experience in advising clients on the structuring of their international investments so as to maximize protection provided for in bilateral investments treaties. He also advises clients on strategic issues regarding dispute resolution clauses and procedures.

Prior to joining Ajamie LLP, Esteban practised law with two leading Argentine law firms in Buenos Aires and an international law firm in Houston and London. He has extensive experience in complex commercial arbitration and litigation before the federal and local courts of Argentina, including the National Supreme Court of Justice. His experience includes cases related to the oil and gas, energy and mining industries, as well as construction and environmental matters. He has also advised clients in bankruptcy and reorganization proceedings with multi-jurisdictional aspects. Esteban is a Spanish native speaker, and is fluent in English and Italian. He also has a working knowledge of French.

National University of Tucumán, Argentina

  • J.D. equivalent 1996, First in Class

Columbia University, New York

  • LL.M. 2001, Harlan Fiske Stone Scholar
  • Texas
  • Buenos Aires, Argentina
  • San Isidro Bar Association (inactive)
  • Tucumán Bar Association (inactive)
  • Representing a US company in its ICSID and UNCITRAL investment claims against Ecuador for the violation of the US-Ecuador BIT involving an oil production-sharing contract.
  • Representing three Spanish companies in their ICSID investment claims against Argentina under the Spain-Argentina BIT, concerning the nationalization of two major airlines.
  • Advising a major US energy company in its ICSID claim against Ecuador under the US-Ecuador BIT, concerning the expropriation of two oil blocks.
  • Advising a US company in its claim against Argentina before ICSID, involving its investment in the natural gas distribution industry and the abrogation of dollar tariffs and inflationary adjustments.
  • Representing a US company in its ICSID claim against Ecuador and its state-owned oil and gas company regarding the breach of an oil and gas contract under Ecuadorian law.
  • Advising oil and gas companies in the restructuring of investment projects and mandatory renegotiation of oil and gas contracts in Bolivia.
  • Advising oil and gas companies in their ICSID and UNCITRAL BIT-based claims against Ecuador.
  • Advising major US oil and gas companies in the structuring of their international investments, maximizing the BITs protective provisions.
  • Representing a major international Canadian-based bank and its subsidiaries in mediation, conciliation and litigation proceedings in Argentina.
  • Representing major international mining companies in their arbitration and judicial proceedings in Argentina, including cases finished with a Supreme Court decision.
  • Advising a Canadian mining company on Argentine law issues in a multi-billion dollar case.
  • Assistant Professor of Contract Law at the National University of Tucumán Law School, Tucumán, Argentina (1996-2002)
  • Assistant Professor of Civil and Commercial Contracts at Austral University Law School, Buenos Aires, Argentina (2004-2007)
  • CARAT (Argentine Committee for National and Transnational Arbitration) (Buenos Aires, Argentina)
  • Spanish Arbitration Club (Madrid, Spain)
  • Houston Bar Association