
MARIANA OLIVEIRA
SENIOR ACCOUNTANT
CRC/SP 324802O6

Mariana is a specialist in taxation for both individuals and legal entities. Throughout her career, she has developed an approach that is sensitive to each client’s reality, making tax matters lighter, more accessible, and applicable across a wide range of scenarios — from the simplest to the most complex.
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She is a Chartered Accountant registered with CRC/SP under number 324802O/6 and holds a postgraduate qualification in Tax and Financial Accounting from the State University of Londrina (PR), with a focus on planning involving Brazil and other countries. She has also deepened her expertise in financial products, credit operations, and intermediation, with particular emphasis on the correct identification of applicable taxes.
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Mariana is a member of the Exchange and International Affairs Committee of CRC/RJ and also serves on the Tax Committee of the Brazilian Association of Migration and Global Mobility Specialists, where she volunteered as Vice-Coordinator from 2023 to 2025.
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Since 2013, she has been dedicated to Mosaico Tax — a company registered in the United Kingdom — advising companies and individuals, whether resident or non-resident in Brazil, on tax planning projects and various regularisation matters. Her experience enables her to develop secure solutions aligned with the complexity of each case, particularly for those facing the challenges of relocating between countries and transitioning tax residency.
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In the corporate sphere, she provides support for the structuring of Brazilian companies with foreign shareholders, including analysis of tax regimes, review of articles of association, and regularisations with authorities such as the Commercial Registry, Federal Revenue Service, State Treasury Departments, and the Central Bank — especially in matters involving capital injections and foreign investors.
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With meticulous attention to each client’s specific circumstances, Mariana develops tailored studies and solutions aimed at ensuring security, clarity, and comprehensive support in financial and tax decision-making. Her commitment is always to resolve as many issues as possible so that every client feels supported, well-informed, and prepared to plan the future with confidence and peace of mind.
