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.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- 'COSRO's team is one of the leading legal teams in the Brazilian energy sector. They are capable and reliable in assisting their clients in a full range of legal services related to regulatory, M&A, environmental, tax, banking and finance, litigation and labour. We are able to rely on them for all of our legal needs.'
- 'COSRO's hydrocarbons practice is adept at navigating the intricate Brazilian regulatory landscapes, including managing large-scale projects as well as ensuring compliance with regulatory requirements, environmental regulations, safety standards, and other relevant laws. Their deep technical knowledge and understanding of the energy sector sets them apart from more generalist firms.'
- 'Marcelo Frazão is a phenomenal O&G lawyer and one of the greatest experts in Brazil in the O&G industry and M&A. Marcelo should be praised for his intelligent approach to our legal issues.'
- 'Alexandre Calmon is one of the leading O&G lawyers in Brazil, having acted in several of the main O&G deals in Brazil. We have been relying on his assistance for over a decade and could not be more pleased with the service we get.'
- 'Lucca Galatro has demonstrated remarkable maturity and market knowledge. He is intelligent, capable and always provides insightful inputs in our transactional matters.'
Key clients
- Cobra O&G Group
- Perenco O&G
- Karoon Petróleo e Gás
- Total Energies
- MODEC
- BW LNG
- McDermott
- FS
- Misc Berhad
- Baker Hughes
- Sonangol
- Acelen
Work highlights
Advised Acelen on the development of a biorefinery in Bahia, supporting decarbonisation strategies and carbon credit generation from Macaúba crops for biodiesel and sustainable aviation fuel (SAF) production.
Advised Perenco on negotiations with Petrobras for the acquisition of 100% of Petrobras' interest in the Cherne and Bagre Fields, located in shallow waters of the Campos Basin.
Adivsed ATGás on the legal analysis and structuring of the capacity market area manager, which is a role established in the New Gas Law (Law No. 14.134/2021), and the procedures for its formation.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Practice head
Alexandre Calmon; Marcelo Frazão; Henrique Rojas; Isabela Morbach
Other key lawyers
Lucca Galatro