Mr Diego Gosis > GST LLP > Miami, United States > Lawyer Profile

1111 Brickell Avenue
SUITE 2715
MIAMI, FL 33130
United States

Work Department

International Law & International Arbitration




In his 20+ years in international law, Diego Gosis has participated as counsel, conciliator, sole arbitrator or chair in more than 100 high-value and high-stakes disputes and has been ranked among the leading practitioners of international arbitration in Latin America by Chambers & Partners, Legal 500 and Who’s Who. 

Diego has represented sovereigns and private parties in international arbitration and annulment proceedings in the Americas, Europe and Asia. He has extensive transactional experience, including mergers and acquisitions of privately-held and publicly-listed companies, the development and financing of technology, real estate, hydrocarbon, hotel and casino operations, arranging and counseling participants at public and private tenders, arranging estate and tax planning structures, and advising commercial firms, individuals, and sovereign instrumentalities on matters of commercial, administrative, and international law. 

He has acted as counsel in numerous international disputes which includes cases under the rules of the International Chamber of Commerce (ICC), International Centre for Dispute Resolution (ICDR), the United Nations Commission on International Trade Law (UNCITRAL), and International Centre for Settlement of Investment Disputes (ICSID). Most notably, Diego has represented the prevailing party in leading investment awards on issues of jurisdiction (Daimler v Argentina, ICS v Argentina, Blue Bank v Venezuela, Transban v Venezuela, Favianca v Venezuela, Clorox v Venezuela, Manuel García Armas v Venezuela), merits (Metalpar v Argentina, Urbaser v Argentina) and annulment (Sempra v Argentina, Enron v Argentina), among many others.  

His experience as an arbitrator includes having been appointed by (or being listed in the roster of arbitrators of) the ICC, Permanent Court of Arbitration, AAA/ICDR, LCIA, and a number of local and international arbitration centers in the Americas, Europe and Asia.

A partner at GST LLP, a leading international dispute resolution law firm, Diego is based in their Miami office. He frequently mentors and trains the teams of the University of Buenos Aires in several arbitration competitions, and currently serves at the Board of Advisors to the FDI Moot on investment arbitration. He is also a member of the Board of the Association for International Arbitration.


English, Portuguese and Spanish


  • ICC’s Latin American Group
  • ICC’s Institute of World Business Law 
  • ICC’s Commission on Arbitration and ADR 
  • Club Español del Arbitraje
  • ICCA
  • IBA’s Arbitration Sub-committee
  • ALArb


Diego graduated from University of Buenos Aires, where he received dual degrees on law (1998) and English-Spanish translation (1999).

Lawyer Rankings

Latin America: International firms > City focus - Miami

GST LLP is a Miami-based firm with an intense focus on international arbitration, in particular investor-state and public international law disputes involving Latin American nations. While the firm’s practice covers a range of geographies around the world, Latin America remains its true forte, and it continues to be noted for its representation of sovereign states and investors in major headline cases. This includes acting for the Bolivarian Republic of Venezuela and its state-owned oil and gas entity Petróleos de Venezuela (PDVSA) in a number of disputes. Diego Gosis, Quinn Smith and Ignacio Torterola comprise a senior bench of genuine Latin America arbitration specialists.

Latin America: International firms > International arbitration

With a decade in the market, highly regarded international arbitration boutique GST LLP is now an established market presence, regularly handling sizeable, high-impact cases globally. The firm recently strengthened its Latin American practice notably with the May-2021 hire of Venezuelan practitioner Carmine Pascuzzo as counsel in the Washington DC office; and the addition of Domenico di Pietro (from Bryan Cave Leighton Paisner LLP) as a partner at the London office the following month. Founding partners Ignacio Torterola (in Washington DC), and Diego Gosis and Quinn Smith (in Miami) co-lead the Latin America team, which acts primarily in ICSID, UNCITRAL and ICC proceedings – be it as counsel or arbitrators. In addition to commercial matters, the practice has developed a strong roster of sovereign clients, including Venezuela and Guatemala. An experienced and capable second line is led by Pablo Mori (in Washington, DC) and Katherine Sanoja (in Miami), who were both raised to counsel in May 2020. Associate Fabian Zetina is also noted.