Martínez de Hoz & Rueda

Martínez de Hoz & Rueda is the dominant legal adviser in the Argentine oil-and-gas industry and has established itself as market reference point on all aspects of oil-and-gas law - including exploration, production, transportation, distribution and marketing. With offices in the capital of Buenos Aires, as well as the country’s shale gas hub, Neuquén, the firm is the first port of call for domestic and international players seeking support on hydrocarbon concessions and renegotiations, unconventional hydrocarbon operations, and oil-and-gas infrastructure development (including pipelines and LNG terminals). A large portfolio of retained global oil-and-gas players also rely on the team for assistance in complex multi-contract, multi-party disputes and arbitrations. The practice’s network of international clients has seen it step beyond its core Argentine market and take on work in other Latin American jurisdictions, including Peru and Uruguay. The practice is co-led by a formidable team of senior oil-and-gas specialists that includes José Martínez De Hoz, a market authority on hydrocarbons law and related arbitration matters; the vastly experienced energy lawyer Pablo Rueda, who oil-and-gas clients have turned to for counsel for more than 30 years; and Tomás Lanardonne, who leads the firm’s prolific Neuquén office and has a long track record in oil-and-gas transactional and regulatory matters. Further partner back-up is provided by public law specialist Juan Cruz Azzarri; Jimena Vega Olmos, who specialises in oil-and-gas law, government contracts, and project financing; and recently promoted partner Marcos Blanco, who covers oil-and-gas, project finance, M&A, and dispute resolution matters. Former associate Valeria Celesti exited to an in-hous role in August 2024.