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Boutique tax firm specialized in international tax law

Kevin Sirman
Attorney-at-law

Attorney-at-law with over 9 years of experience in international tax law, registered at the Geneva & Paris Bar Associations, advising international private clients on international tax planning, cross-border structuring and efficient private wealth organization

Focusing on complex international situations

Our practice focuses on complex international situations involving multiple jurisdictions, including tax residency issues, cross-border investment structures, holding and ownership planning, and the coordination of tax exposure across different legal systems.

Our approach is pragmatic, discreet and highly personalized, with a strong focus on legal certainty, tax efficiency and long-term sustainability in an international context.

We regularly advize clients with ties to Brazil, France, and the United States, and assist them in navigating the interaction between domestic tax rules and international tax treaties.

From strategic tax advice to the design and implementation of tailored legal and tax structures, taking into account income tax, wealth tax and succession-related tax aspects where relevant.

We are experienced in situation involving US citizens and I provide solutions to mitigate the double taxation issues.

We also have a special knowledge of the conventions with Brazil (social security and tax treaty) and can assist with taylor-made propositions.

We work fluently in French, English, and Portuguese, with conversational Russian.

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Our Key Specialties

Tax Advising

We offer expert tax advising in international tax law and cross-border structures, ensuring compliance and optimisation for HNWI and multinationals.

We negotiate with tax authorities to secure optimal lump-sum taxation agreements.

Tax Litigation

We represent clients in complex disputes before Swiss and French authorities. We defend against assessments, secure favorable rulings, and leverage treaty protections to minimise exposure and achieve optimal outcomes.

Corporate Law

We advise on corporate law with a focus on company formation, from Swiss SA/AG setups to international holding structures. We guide entrepreneurs through incorporation, governance, and compliance, ensuring seamless cross-border establishment.

Immigration law

Our boutique tax firm provides immigration law advice tailored to investors and professionals, focusing on Swiss residence permits, work authorizations, and lump-sum taxation regimes. We streamline applications for high-net-worth individuals seeking cross-border mobility and tax-efficient relocation.

Our Key Specialties

Death and taxes are certain. But we will handle the second ones.

Contact

Geneva - Switzerland

35, rue des Bains

1205 Geneva

Paris - France

87, boulevard Malesherbes

75008 Paris

São Paulo - Brazil

205, Rua Olimpíadas, Vila Olímpia

São Paulo - SP, 04551-000

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+41 78  626 58 78

+33 642 53 60 37

Affiliations

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