Altagna Advisory is a Geneva-based fiduciary and corporate advisory firm.
We support Swiss and international clients in structuring, managing, and growing their companies, while upholding the highest standards of Swiss expertise.
Through consolidated relationships with renowned banks, law firms, notaries, financial institutions, and insurance companies worldwide, we provide our clients with privileged access to a broad range of high-level expertise.
Swiss Expertise. Global Perspective.
Our Services
- Incorporation and management of companies in Switzerland and abroad (UAE, Singapore & more)
- Appointment of directors or managers
- Registration of legal addresses
- Bank account opening in Switzerland and abroad
- Compliance services
- Financial and Analytical Accounting
- Preparation and filing of VAT statements, ensuring timely and compliant submissions.
- Preparation of interim and annual financial statements in accordance with Swiss standards
- Accounts Review & Audit Support
- Swiss Tax Representation : acting as tax representative in Switzerland for foreign companies, ensuring full compliance with local regulations.
- Tax Return Preparation & Filing
- Tax & Legal Advisory
- Payroll & Employment Administration (comprehensive payroll management, preparation of employment contracts, and coordination of social security and insurance obligations).
- Assistance with applications for Swiss work and residence permits
Our Values
Client Focus
Understanding and anticipating your needs
Global Perspective
Swiss know-how, international reach
Excellence
Uncompromising quality in every services
Integrity & Confidentiality
The foundation of lasting trust
Marion Sechi
Founder & CEO
Marion Sechi, Founder & CEO of Altagna Advisory Sàrl, is a Chartered Specialist in Accounting and Financial Management, holding a Swiss Federal Diploma of Higher Education.
With more than 15 years of professional experience, Marion has developed a solid track record in client advisory, finance, accounting, and taxation. She has been working for over a decade with commodity trading companies, where she provides tailored solutions in financial management, accounting, and tax compliance.
Renowned for her client-oriented approach, Marion combines technical expertise with a strong ability to understand the specific needs of each client, ensuring efficient, reliable, and forward-looking support. Bilingual in French and English, she works seamlessly with both Swiss and international clients.
Through her dedication, expertise, and discretion, Marion embodies the values of Altagna Advisory and continues to strengthen long-term relationships built on trust and excellence.
Trang (Lou) Quentin
Accounting Assistant
She holds an Accounting Assistant diploma from IFAGE in Geneva and joined Altagna Advisory on December 1st, 2025.
She speaks French, English and Vietnamese.
Contact us
Questions about company setup, accounting, or tax?
We’re here to support your business in Switzerland and abroad – contact us today!
Altagna Advisory Sàrl
Cours des Bastions 13
1205 Geneva, Switzerland
info@altagna.ch
+41 22 512 57 77
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