
Banks, investors and sponsors regularly turn to CS’Associados for advice on project finance and M&A matters involving renewable energy assets, most notably windfarms, solar PV and biomass plants. The practice is led by Mafalda Ferreira, recognised for her experience in domestic and cross-border transactions and her strong command of the energy regulatory framework. Duarte Brito de Goes has a strong track record in greenfield and brownfield project investments, while Mariana Silva Pereira is sought after by lenders and operators in the photovoltaic sector, particularly in solar auctions and the structuring of energy portfolio transactions.
Legal 500 Editorial commentary
Accolades
Client satisfaction: Lawyer & team quality
Client satisfaction: NPS ®
Testimonials
Collated independently by Legal 500 research team.
- ‘Elite office with a smaller dedicated team, commercial, engaging and client-oriented. Very sound technical knowledge.'
- ‘CS is characterised by a team of extremely high-quality and capable lawyers, which is not always the case, who interact in a way that produces a final result with contributions from all of them based on the real interests of the clients. Additionally, we always find a complete willingness to take on matters, and a quick, concise, and understandable response.’
- ‘Customisation of services provided, availability, industry knowledge.’
- ‘The firm distinguishes itself through its technical expertise and ability to offer effective legal solutions tailored to each client's needs. The team combines solid experience with a practical and collaborative approach, ensuring a rigorous, transparent, and results-oriented service.'
- ‘Among the most outstanding professionals on the team, Mafalda Ferreira deserves special mention. Her combination of technical rigour, analytical skills, and practical approach to problem-solving has been widely recognised by clients. Mafalda stands out for the clarity with which she communicates complex solutions, her attention to detail, and her ability to maintain a strategic perspective on legally demanding matters.
- ‘Experience and knowledge.’
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.

Practice head
Mafalda Ferreira
Other key lawyers
Duarte Brito de Goes; Mariana Silva Pereira
