Department profile
Mariz de Oliveira e Siqueira Campos Advogados

Tax Litigation: The Elite

Global Guide 2026 : Brazil

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Mariz de Oliveira e Siqueira Campos Advogados

Rankings

Chambers Review

Provided by Chambers

Tax Litigation: The Elite - Brazil

Band 1

What the Team is Known For
Mariz de Oliveira e Siqueira Campos Advogados is a prestigious tax boutique earning the highest of praises for its impressive track record of handling sensitive contentious mandates. It remains a first port of call for companies in need of representation before CARF and courts at all levels. The distinguished team remains at the forefront of direct tax matters, including CSLL and IRPJ, with additional capabilities in handling indirect taxes such as ICMS and ISS. The team has further expertise advising its client roster on cross-border matters involving international tax treaties.
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Work Highlights

Provided by Chambers

  • Mariz de Oliveira e Siqueira Campos represented Novelis do Brasil in a tax lawsuit filed to cancel the tax assessment issued by the State of São Paulo. 

Strengths

Provided by Chambers

  • Their business acumen is high. They are always up to date on important tax matters, handling mandates with deep knowledge and technical skills.

    Tax Litigation: The Elite respondentGlobal

  • The team is composed of extremely qualified professionals who always demonstrate a lot of knowledge and confidence in their work. They always complete the work within the established deadlines.

    Tax Litigation: The Elite respondentGlobal

  • They have technical knowledge, and are fast and effective.

    Tax Litigation: The Elite respondentGlobal

Notable Practitioners

Provided by Chambers

  • Ricardo Mariz de Oliveira
    Ricardo Mariz de Oliveira

    Ricardo Mariz de Oliveira

    Distinguished partner Ricardo Mariz de Oliveira has formidable recognition for his outstanding experience acting on high-profile tax litigation. He is especially noted for his expertise in administrative disputes involving social security contributions and income tax-related matters.

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  • Bruno Fajersztajn
    Bruno Fajersztajn

    Bruno Fajersztajn

    Bruno Fajersztajn is a well-equipped lawyer, frequently sought out by important clients to represent them in complex tax cases, and particularly noted for his expertise in federal taxation, especially corporate income tax, PIS and COFINS.

    • Bruno Fajersztajn is my point of reference when it comes to income tax.

      Tax Litigation: The Elite respondentGlobal

    • Bruno is a very good lawyer; he is excellent.

      Tax Litigation: The Elite respondentGlobal
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  • Fabiana Carsoni Alves Fernandes da Silva
    Fabiana Carsoni Alves Fernandes da Silva

    Fabiana Carsoni Alves Fernandes da Silva

    Fabiana Carsoni Alves Fernandes da Silva is active representing clients in both judicial and administrative tax disputes involving mostly federal taxation.

    • Fabiana is always ready to advise the clients giving them strategic and efficient solutions.

      Tax Litigation: The Elite respondentGlobal

    • Fabiana is one of the best tax lawyers. She communicates clearly and has business acumen.

      Tax Litigation: The Elite respondentGlobal
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Ranked Individuals at Mariz de Oliveira e Siqueira Campos Advogados (3)

Brazil

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