'With developed expertise in all segments of the sector', Mattos Filho advises E&P companies, natural gas distributors, service providers, private equity firms, and banks across the entire oil and gas chain - upstream, midstream and downstream – combining transactional and regulatory expertise. On the transactional side, the team delivers ‘business-oriented solutions’ in cross-border M&A, divestitures, joint ventures, financing and debenture issuances. The department also handles daily operational and regulatory matters, including bidding rounds, contractual and regulatory structuring, and litigation. Giovani Loss advises on M&A, financing and regulatory issues in the oil and gas segment, while seasoned adviser Felipe Feres handles M&A transactions and projects involving petroleum, natural gas and biofuels. Nilton Mattos and Bruno Chedid, both transactional and regulatory experts, further strengthen the practice; Mattos focuses on dispute resolution, while Chedid is well-versed in financings and sector-specific contract negotiations. At the associate level, Arthur Barbosa Maranhão Pinto is experienced in gas sales agreements, gas reserves monetisation, and regulatory aspects of gas storage projects.

Tauil & Chequer Advogados offers full-service expertise across all oil and gas segments, blending ‘technical expertise and strategic insight’. Drawing on its association with Mayer Brown, the team is well positioned to advise on cross-border transactions, including sector-related M&A and divestments, and is equally strong in regulatory mandates,  and strategic partnerships and agreements. The team also handles disputes, including international arbitration and administrative proceedings before ANP, supported by an interdisciplinary approach that ‘proactively foster[s] seamless collaboration among specialists’. Practice head Alexandre Chequer, based between Rio de Janeiro and Houston, is a market veteran in transactions, regulatory matters, project development, and dispute resolution. Bruno Belchior, who is ‘remarkably well-versed in industry-specific matters’, is recognised for his ‘impressive command of regulatory aspects’. Tiago Macêdo draws on his experience at ANP to advise on infrastructure projects, M&A, privatisations, and auctions. Associate Bárbara Leite has extensive experience in the upstream and midstream segments, acting in complex cross-border transactions.

Cescon Barrieu’s team is vastly experienced in financings in the oil and gas sector, advising on upstream, drilling, floating production storage and offloading (FPSO), oil royalties and floating storage and regasification units (FSRU). Its transactional capabilities span project development, M&A, capital markets and restructuring, complemented by expertise in regulatory, contractual and corporate matters. Practice head Rafael Baleroni is noted for his ‘deep knowledge of applicable laws and regulations’ and ability to handle ‘high-profile, time-sensitive cross-border transactions’. Maurício Teixeira dos Santos specialises in M&A, project development and finance, divestments, tender offers and restructurings. André Lemos joined as a partner from Lefosse Advogados in April 2025.

Machado Meyer Sendacz e Opice Advogados advises across all segments of the oil and gas sector, including E&P, downstream and the energy transition, supporting clients in regulatory and transactional matters. Recent work includes M&A, project development and implementation, business and partnerships structuring, contract negotiation, gas sales and imports, and administrative disputes. A leading figure in the sector, practice head Daniel Szyfman combines a strong M&A and transactional practice with significant involvement in decarbonisation projects. Maria Fernanda Soares, praised for her ‘impeccable performance’, leads the firm’s natural and renewable gas efforts, advising on project development from both transactional and regulatory perspectives. Fernando Xavier, another name to note for transactional issues, specialises in complex regulatory advice in downstream and E&P, while associate Mariana Campos focuses on midstream and downstream projects.

Following the incorporation of former Souto Correa Advogados’ oil and gas specialists in September 2023, Veirano Advogados has strengthened its oil and gas offering, building a strong reputation in natural gas-related regulatory, contractual and project implementation and structuring matters. With a strong following of service providers and producers, transporters, marketers, gas distributors, and large consumers, the group is also active in petroleum derivatives, as well as in the emerging biogas and hydrogen sectors. Ali El Hage Filho, whose wide-ranging expertise includes large-scale projects and transactions, co-leads the practice with Lívia Amorim, who focuses on complex regulatory issues, infrastructure assets deals and contracts. At the associate level, Tito Rosa is experienced in ANP bidding rounds, contracts, administrative litigation and regulatory consulting, while Arthur Lardosa advises on regulatory matters across natural gas, biomethane, biogas, gas-to-wire, fuel and biofuel.

Active in both the upstream and downstream segments, Campos Mello Advogados is regularly engaged by industry players for transactional, regulatory and litigation matters. Following its September 2025 integration with Schmidt, Valois, Miranda, Ferreira & Agel Advogados, the combined firm offers enhanced expertise across the oil and gas chain, advising on cross-border transactions, financings, LNG and biomethane projects, gas supply agreements and regulatory issues. Key contacts include São Paulo’s Fabiano Gallo, who is experienced in M&A and foreign investments, and Schmit Valois partners Paulo Valois and Rogério Sobral De Miranda. Former co-heads Alexandre Bittencourt Calmon, Marcelo Frazão and João Marçal Martins, together with several partners and associates, departed in November 2024.

Working in the downstream, midstream, gas-to-power and upstream segments, Lefosse Advogados is recognised for possessing the ‘technical knowledge required for complex projects’ in the oil and gas sector. Recent mandates include advising on gas sales and transportation agreements, asset acquisitions, M&A transactions, arbitrations and bidding processes. Practice head Felipe Boechem brings extensive industry experience, with a focus on M&A and project structuring and development. At the associate level, Pedro Vargas and Stephani Oliveira provide well-rounded support in regulatory, contractual, transactional, and project development matters.

Pinheiro Neto Advogados advises domestic and international companies across all oil and gas segments on regulatory and transactional matters. Practice heads Raphael Moraes Paciello and Marcello Lobo are experienced in M&A, joint ventures and concession agreements; Paciello also handles ANP administrative processes and sector-specific contracts, while Lobo oversees financing transactions and regulatory changes. Marcelo Viveiros de Moura is a key contact for international clients; Ricardo Coelho stands out for his experience in ethanol and biofuel projects; Francisco Werneck Maranhão brings extensive experience in corporate and financing transactions; and Luis Cláudio Furtado Faria focuses on oil and gas disputes.

The ‘extremely technical’ team at Trench Rossi Watanabe advises key oil and gas players and associations, showcasing notable strength in high-profile regulatory, public law and litigation mandates. The team is also well-positioned to advise on transactions, project structuring, and crude oil and by-products trading, while maintaining active involvement in the energy transition, especially in the hydrogen space. Practice head Danielle Valois’ areas of expertise span transactions, project development, bidding processes, regulatory issues and litigation. Regulatory expert Gabriela Bezerra Fischer, who became partner in July 2024, handles industry-specific contracts, transactions and ANP bidding rounds.

Established in November 2024, COSRO brings together leading oil and gas specialists Alexandre Bittencourt Calmon, Marcelo Frazão, Henrique Rojas and Isabela Morbach, formerly of Campos Mello Advogados and Tauil & Chequer Advogados. Drawing on the team’s wide-ranging experience, the group is well placed to advise industry players, government bodies, associations, financial institutions and investment funds on transactions, project structuring, contracts, disputes, financing and complex regulatory issues. The team’s notable experience includes the acquisition of onshore and offshore oil and natural gas E&P assets, interactions with the ANP, key industry disputes, and offshore infrastructure development.

Demarest Advogados’ ‘very competent team’ handles cross-border transactions, project financing, corporate reorganisations, and regulatory compliance for a wide range of clients operating in the hydrocarbons sector. The practice also assists with proceedings before the ANP and concession bidding rounds, with recent mandates involving vessel chartering and operation bids. Leading the ‘excellent’ practice from Rio de Janeiro are David Meiler, who frequently supports international companies entering or operating in the Brazilian market, and João Almeida, noted for his expertise in farm-outs, M&A, financing and regulatory matters. Associates Lívia Borges Leal and João Raphael Aranha provide M&A and regulatory support.

With a strong foothold in project financing, Stocche Forbes Advogados advises local and international oil and gas companies and financial institutions on M&A, regulatory compliance, project structuring, and industry-specific agreements. The team also handles ANP bidding rounds, administrative proceedings, and biomethane and biodiesel mandates in the energy transition context. Leading the practice from São Paulo are Guilherme Forbes, who is singled out for his vast experience in financial and corporate transactions, and Mariana Saragoça, noted for her expertise in privatisation processes, auctions and regulatory matters. Co-heads Frederico Moura and Bruno Gandolfo in Rio de Janeiro, Ana Clara Viola in Belo Horizonte and São Paulo-based Marco Saliba share expertise in project finance and development, M&A and debt restructuring.

Vieira Rezende’s multidisciplinary team advises on E&P regulatory and transactional matters, midstream and downstream natural gas projects, and the distribution of crude oil and oil and gas by-products and biofuels. Its alliance with Wikborg Rein enhances its offshore capabilities, with recent mandates focusing on FPSOs and charter vessels. Oil regulatory expert Daniela Ribeiro Davila leads the practice and handles onshore and offshore asset acquisitions and divestments, while senior associate Candice Buckley Bittencourt advises on contractual, administrative and judicial matters. Thiago Luiz Pereira Da Silva and Mariana Rossi left the firm in March 2025.