Brazil Guide 2026 : Brazil
Ranked Individuals
Provided by Demarest Advogados
An advisory and transactional track record in the sector which is second to none.
We have one of the country’s most experienced practices focused on energy, natural resources and infrastructure transactions, including mergers and acquisitions, project finance and project development across all fuel types.
Our experts span all of our practice groups, including corporate M&A, private equity, capital markets and debt and project finance, oil and gas transactions as well as specialists in tax and environmental regulation.
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Demarest Advogados has an much-admired practice group with notable experience handling power mandates for a significant client portfolio. The firm has a strong track record in sector-related litigation and administrative proceedings before ANEEL. It also oversees the structuring of high-profile power generation projects and power purchase agreements.
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Demarest Advogados advised Vale on the negotiation of a share purchase agreement for the sale of a 70% stake in Aliança Geração de Energia to GIP, valued at BRL5.4 billion.
Provided by Chambers
The firm benefits from a successful track record in this sector. Demarest's service was well delivered, with openness to discussion.
Demarest combines technical knowledge with good relationships with regulatory authorities, supporting more effective decision-making. The team responds very quickly, in a cordial and helpful manner.
The quality of Demarest's reviews and advice is consistently excellent. The team is large, with professionals who are always available, allowing them to meet challenging deadlines.
Demarest's team demonstrates in-depth knowledge of the energy sector, with a practical understanding of corporate, contractual and regulatory structures typical of the market. It works seamlessly across commercial, financial and regulatory areas, translating complex legal issues into clear and executable solutions. The team also brings experience in large-scale operations, with effective management of risk, timelines and multiple stakeholders, alongside a pragmatic and business-oriented approach that prioritises deal viability without compromising legal rigour.
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Rosilane Costa Barros often acts on litigation, contractual and regulatory mandates in the power sector. She has a strong offering in structuring and implementing power generation projects.
Rosilane Costa Barros demonstrates profound technical knowledge, coupled with a consistent professional attitude and organised management of the tasks under her responsibility. She stands out for her clear communication, attention to detail and ability to engage constructively with the various parties involved in the operations. She demonstrated a solid understanding of legal issues and the context of the operations, contributing efficiently and collaboratively to the progress of the work.
Rosilane is a highly professional and experienced partner.
She is always available and has extensive knowledge of the Brazilian electricity sector. Rosilane Barros focuses on practical solutions with strong legal certainty. In meetings, she consistently advocates for the client and is committed to finding the best solution.
Henrique Reis is a lawyer commonly seen acting on regulatory mandates in the power sector, including administrative proceedings and transactional work.
Henrique Reis is certainly among the top tier of lawyers in the energy sector. He combines experience, solid legal knowledge, technical and commercial expertise in the sector, as well as extensive networking, with analytical depth and, at the same time, objectivity in delivering his work.
Henrique Reis is technically very strong, with deep knowledge of the electricity sector and regulation. In numerous discussions, he is able to recall in detail specific provisions of legislation, regulations and case law. Henrique is always up to date with what is being discussed and decided at ANEEL. He produces high-quality work, supported by a solid technical and legal foundation.
Maria Beatriz Grella Vieira is frequently seen in the power market dealing with the acquisition and sale of power transmission assets, as well as regulatory work.
Maria Beatriz has extensive knowledge and is highly accessible.
Maria Beatriz demonstrates strong technical skills and appropriate performance to her seniority level, with a professional attitude and willingness to support the tasks under her responsibility.
Maria Beatriz Grella Vieira is always thinking about how to make legal matters easier and simpler for the client.
Energy & Natural Resources: Power
Energy & Natural Resources: Power
Energy & Natural Resources: Power
Provided by Demarest Advogados
Maria Beatriz Grella Vieira
View profile of Maria Beatriz Grella VieiraHenrique Reis
View profile of Henrique ReisRosilane Costa Barros
View profile of Rosilane Costa BarrosGlobal 2026
Practice area: Energy & Natural Resources: Power
Location: Brazil
View department profile for Global 2026
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