Philippe Mantel | Lawyer  

Biography | 📷

Philippe Mantel is a lawyer and member of the Geneva Bar Association (ODAGE), the International Fiscal Association (IFA), and the Association of International Business Lawyers (AIBL).

Philippe gained his experience over a decade working in the corporate tax departments of the four largest international accounting firms (“Big 4”) in Geneva, Lausanne, and Zurich. In 2015, Philippe joined the law firm Meyerlustenberger Lachenal (MLL) in Geneva as an associate, becoming a partner in 2019. In this role, he assists individuals and companies with all their tax-related matters. Since 2022, Philippe has been a partner at Lemania Law in Geneva ( Lemania Law Attorneys ).

Philippe was also an associate judge at the Geneva Administrative Court in tax matters until 2018.

Philippe holds a master's degree from the University of Fribourg, a master's degree in international taxation from the University of Lausanne (LLM), a diploma from the Executive Transfer Pricing Program at the University of Lausanne, and a certificate of advanced studies in SME taxation from the University of Neuchâtel.

He is the author of publications in the field of taxation.

He is fluent in French, German, and English.

Rewards and practices

Recognized in The Best Lawyers in Switzerland 2026 for his work in:

• Tax Law

  Thomas Kreienbühl | Accounting & Fiduciary Advisor  

Biography | 📷

Thomas Kreienbühl is a professional with a rich and structured career path, having made a notable transition from strategic product management to the fiduciary sector.

With a Diploma in Industrial Management and Production Engineering from ETH Zurich (with a double specialisation in business management/marketing and information systems), he first honed his expertise over nearly two decades in product management and analyst roles at key companies in Switzerland. His experience with major players in telecommunications (Swisscom, Sunrise), energy (ewz - Elektrizitätswerk der Stadt Zürich) and financial services (Credit Suisse) demonstrates his solid expertise in managing the entire product life cycle, developing business plans and conducting in-depth strategic analyses (market, competition, pricing).

After a personal break in 2014-2015, which included a role as a ski instructor, Thomas Kreienbühl made a successful strategic switch to the fiduciary sector. From 2020, he applied his analytical rigour and attention to detail at Immobilien & Treuhand Chappuis. In this role, he independently managed financial and payroll accounting, VAT and withholding tax returns, as well as the preparation of annual accounts and tax returns for legal entities.

Building on this experience, Thomas joined PM corporate services in 2026.

  Debora Nkombe | Corporate Lawyer and Economist  

Biography | 📷

Ms. Debora Nkombe holds a bachelor's degree in economic law. She manages all administrative activities related to domiciled companies (social security and tax reporting formalities, preparation of internal documents, minutes of meetings).