Marval O’Farrell Mairal

Marval O’Farrell Mairal is called on by a blue-chip domestic and international client base for advice on sophisticated tax structures, complex cross-border transactions and high-profile tax litigation, particularly against the National Tax Authority. The team is also comfortable handling regional tax work across other Latin American jurisdictions, and works closely with peers in the firm’s corporate and M&A practices to advise on the tax aspects of M&A and private equity transactions in a range of sectors, including energy, agribusiness and natural resources. The practice is co-led by a quintet of highly experienced tax partners. The exceptional María Inés Brandt handles high-level tax planning and transactional work; Gabriel Gotlib is a market reference on international tax matters; Walter C. Keiniger is known for the strength and depth of his corporate taxation practice; Fernando Vaquero is a respected M&A tax practitioner; and Sergio Vergara, who was raised to the partnership in 2023, has a strong tax litigation practice. The partner team was recently further boosted with the promotion of corporate tax lawyer Luciana Virgile in August 2024. Other key names include outstanding tax and customs of counsel Horacio García Prieto, who brings decades of senior-level experience to the table, and associate María Paula Castelli (an expert in international tax), who leads a capable second line.