Martinelli Advogados has appointed two new partners to its disputes practice, expanding its tax and administrative litigation capabilities across two key Brazilian jurisdictions amid growing complexity in the country’s regulatory and tax landscape.

In São Paulo, Mariel Orsi Gameiro joins the firm’s administrative litigation practice, where she will focus on complex matters in tax and customs law. Her background includes experience before adjudicatory bodies and active participation in technical forums, providing her with insight into decision-making criteria and regulatory trends. Notably, she has served before the Administrative Council of Tax Appeals (CARF), strengthening the firm’s capacity to handle sensitive matters with direct impact on clients’ operations and tax predictability.

In Paraná, Matheus Monteiro Morosini reinforces the firm’s tax litigation practice, with a focus on structured disputes and tax risk management. His profile combines technical expertise with institutional engagement, including a role at the Paraná Institute of Tax Law (IDT/PR). His addition is expected to bolster the firm’s ability to structure long-term legal strategies in scenarios requiring predictability and legal certainty.

The appointments reflect Martinelli Advogados’ response to the increasing sophistication of tax and administrative disputes in Brazil, particularly in light of ongoing legislative changes. The firm positions the new partners as contributors to an integrated approach combining regulatory insight and business-oriented legal strategy in the management of high-exposure matters.

Fonte: The Latin American Lawyer| Publicado em 12/5/2026 | Clique aqui e veja a publicação original.