Major local and international energy companies constitute the key clientele for Martínez de Hoz & Rueda's public law practice. The team works across concessions, licences, and authorisations, in public tenders before Federal and Provincial governments, and also handles administrative and judicial proceedings. Energy mandates, particularly in the oil-and-gas sector, are the key focus of the practice. Practice head Juan Cruz Azzarri focuses on administrative and constitutional law, public utilities and contracts, antitrust matters, regulated markets, and the oil-and-gas sector. Associate Guillermo Re supports the practice with experience in administrative, energy, and competition law. Former head of practice Jimena Vega Olmos left the team in August 2025.
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Testimonials
Collated independently by Legal 500 research team.
- Prompt attention and response with critical and meticulous analysis of legal issues. Excellent business acumen. Undoubtedly one of the top law firms in Argentina.
Key clients
- Aon Risk Services
- CAPEX
- CGC
- Equinor
- Exxon
- Goldwind
- International Finance Corporation
- JinkoSolar
- Mitsui & Co.
- Neoen
- Orazul Energy
- Industrias Juan F. Secco
Work highlights
Representing Equinor in collective constitutional litigation concerning offshore hydrocarbons exploration permits, defending the validity of administrative environmental authorisations and regulatory decisions against NGO challenges through injunction proceedings, appeals and Supreme Court review.
Advising PECOM and Chevron in connection with the operation of hydrocarbon concessions in Argentina.
Representing Pluspetrol in administrative litigation against the National State seeking recovery of unpaid amounts under a regulatory framework designed to promote gas production,
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Practice head
Juan Cruz Azzarri