Adriano Ryba

André Blotta Laza is a top attorney recognized by Best Lawyers in the practice area(s) of Labor and Employment Law. André Blotta, who practices law in São Paulo, Brazil, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which André Blotta is held by other top lawyers in the same geographic and legal practice area.

Mariana is a foundation partner at Zonenschein Advocacia. Before founding her own firm in 2024, Mariana Zonenschein was a partner for more then 10 years in another prominent litigation firm and built a solid career working in the area of strategic litigation, in processes of relevance in relation to matters and values involved. Among the customers it represents are medium and large sized companies operating in various sectors of the economy, such as steel, entertainment, sports, services and ...

Joyce Roysen is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Criminal Law. Joyce, who practices law in São Paulo, Brazil, has been recognized since 2019. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Joyce is held by other top lawyers in the same geographic and legal practice area.

Caio Julius Bolina is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation. Caio Julius, who practices law in São Paulo, Brazil, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Caio Julius is held by other top lawyers in the same geographic and legal practice area.

Doctor of Law (J.D), Sciences, Law of Economics and Finance, University of São Paulo, in the subfield of Tax Law, São Paulo, 2010. Founder of the Advocacia Fernanda Hernandez and has experience for more than thirty years. Member of the Superior Counsel of Law of the FECOMERCIO/SP. Many publications in specialized journals and six-monthly papers presented do the Federal University of São Paulo during her Doctor Degree. Final doctorate thesis regarding the CFEM (Compensatio...

Mastering in Tax Law at the Programa de Pós-Graduação of the Instituto Brasileiro de Ensino, Desenvolvimento e Pesquisa (IDP) in Brasília. Postgraduate in Tax Law from the Instituto Brasileiro de Ensino, Desenvolvimento e Pesquisa (IDP). Bachelor’s Degree in Law from Universidade do Distrito Federal (UDF). Mainly serves the Tax Litigation area before the Federal Supreme Court, Superior Court of Justice and the Federal Regionals Courts focusing on Tax Law and ...

Rafhael Frattari is a partner of Vilas Boas, Lopes e Frattari Advogados with more than 20 years of experience in Tax Law. He has acted in the litigation of several companies, especially in the steel, mining, and energy sectors. He currently is ahead of VLF’s tax teams in all operations, including Business Restructuring and M&A operations. Frattari was graduated from Universidade Federal de Minas Gerais (1998) and holds a master’s degree (2003) and a Doctorate (2008) from the s...

Daniel Vilas Boas is a partner of Vilas Boas, Lopes e Frattari Advogados with more than 20 years of experience in Civil and Corporate Litigation. He focuses on managing special litigations, aiming to execute the best strategy with technical expertise. Currently, he has been conducting cases of great impact in Commercial Law. Vilas Boas was graduated from Universidade Federal de Minas Gerais (1998), and is a Master and Doctor of Law by Universidade Federal de Minas Gerais (2003 and 2008). Besi...

Mariana is the Managing Partner and Head of Corporate and M&A at Leite, Tosto e Barros Advogados, bringing over two decades of experience in Corporate Law, Mergers & Acquisitions, Governance, Compliance, and Data Protection. As Managing Partner, she leads the firm’s strategic direction and ensures operational excellence across finance, IT, marketing, and administration—combining leadership vision with technical and business precision. As Head of Corporate and M&A, Mari...

Joanna Bastos is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law. Joanna, who practices law in Rio de Janeiro, Brazil, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Joanna is held by other top lawyers in the same geographic and legal practice area.