Department profile
Mariz de Oliveira e Siqueira Campos Advogados

Tax Litigation: The Elite

Brazil Guide 2026 : Brazil

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Mariz de Oliveira e Siqueira Campos Advogados

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About

Provided by Mariz de Oliveira e Siqueira Campos Advogados

The firm has high expertise in tax matters, operating throughout the national territory. It renders services concerning tax issues in general, from consultation to litigation, defending its clients’ interests before judicial and administrative courts, with solid experience in legal opinions, business restructuring, international operations, involving federal, state and municipal taxes. A multidisciplinary approach that ensures careful risk assessment and definition of specific strategy, providing objective responses.

Industries (14)

  • banking
  • financial
  • construction
  • mining
  • commodities
  • airlines
  • communication
  • technology
  • agribusiness
  • automotive
  • chemical industry
  • energy
  • food and beverages
  • pulp and paper industry

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 represented Casas Bahia in a tax litigation case, concerning its right to recover ICMS tax credits on transactions subject to tax substitution, against the State of São Paulo.

Strengths

Provided by Chambers

  • Our first choice on all tax matters, Mariz de Oliveira's team has deep technical knowledge and a genuine interest in resolving our problems with the lowest possible risk.

    Tax Litigation: The Elite respondentBrazil

  • Mariz de Oliveira is a diligent law firm that has a firm grasp on who we are as a company as well as on the topics it handles for us. Its team is really good and assists us with our every need.

    Tax Litigation: The Elite respondentBrazil

  • Mariz de Oliveira is the most reliable tax litigation firm in IRPJ/CSLL matters. It also performs in indirect tax matters, such as ICMS, with the same level of quality it's known for in direct tax concerns.

    Tax Litigation: The Elite respondentBrazil

  • A very accessible tax litigation practice with a true sense of partnership, Mariz de Oliveira has a team that manages to be highly technical without sacrificing commercial vision, which isn't a trait every law firm has.

    Tax Litigation: The Elite respondentBrazil

  • Besides their up-to-date technical knowledge in tax litigation, I salute Mariz de Oliveira's strategic management and detailed monitoring of our cases.

    Tax Litigation: The Elite respondentBrazil

Notable Practitioners

Provided by Chambers

  • Ricardo Mariz de Oliveira
    Ricardo Mariz de Oliveira

    Ricardo Mariz de Oliveira

    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.

    • Ricardo Mariz de Oliveira's name and reputation are indisputable in contentious tax matters.

      Tax Litigation: The Elite respondentBrazil

    • Ricardo Mariz de Oliveira has great prestige and history in the tax litigation sphere.

      Tax Litigation: The Elite respondentBrazil
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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 litigation cases, and particularly noted for his expertise in federal taxation, especially IRPJ and PIS/Cofins.

    • Bruno Fajersztajn is an excellent professional, very assertive in his tax litigation analyses and conclusions.

      Tax Litigation: The Elite respondentBrazil

    • I must praise Bruno Fajersztajn's high technical knowledge, assertiveness in responses and understanding of the clients' business.

      Tax Litigation: The Elite respondentBrazil

    • A highly skilled tax litigation lawyer with extensive technical knowledge across a wide range of topics, Bruno Fajersztajn suggests various solutions to problems, evaluating the benefits and risks of each approach.

      Tax Litigation: The Elite respondentBrazil
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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 Carsoni Alves Fernandes da Silva is an excellent professional who gives us great confidence, always working with the best outcome in mind.

      Tax Litigation: The Elite respondentBrazil

    • Highly approachable and a true partner, Fabiana Carsoni Alves Fernandes da Silva is technically strong without losing sight of a deep understanding of the business. On top of that, she is always up to date on issues that matter to us.

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

Brazil

Members

Provided by Mariz de Oliveira e Siqueira Campos Advogados

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