Who We Are

As an uncomplicated sparring partner, we give you the security of knowing that you, as an entrepreneur, comply with all legal requirements at all times.

Our core competence lies in the maintenance and development of a comprehensive administration in order to provide our customers with the essentials at the right time and in the appropriate context. We relieve you and advise you so that you can concentrate on your business and your clients. Through our network in the areas of tax, audit and law, we can offer our clients comprehensive advice.


Our Team

Claudia Wüthrich

"Exciting people, mutual trust and long-term partnerships still inspire me every day."

  • About Claudia

    Claudia is a certified fiduciary expert and has been managing ABACONS Treuhand GmbH as owner since 2005 and is responsible for the operational activities of the company. Before she took over the management of ABACONS, Claudia was an employee of KPMG Zurich in the area of taxes. Subsequently, she worked for a tax boutique in Zurich in the area of fiduciary services.

Stéphanie Kern

"The combination of flexibility, open communication, varied challenges and a super team spirit drives me."

  • About Stéphanie

    After completing her apprenticeship as a business administrator EFZ in public administration (E-profile), Stéphanie gained professional experience in both public administration and fiduciary services. As a fiduciary with a Swiss Federal Diploma, she is now working as mandate manager at ABACONS.

coming soon

"We’re excited to welcome Norina to our team in August as a fiduciary associate."

coming soon

"Mirko will be joining our team in September as a fiduciary manager."

coming soon

"Starting as a fiduciary associate in April 2026. We look forward to welcoming her!"

Rolf M. Wüthrich

"Understanding my clients' ambitions and visions and playing our part in their success together with our team and partner network."

  • About Rolf

    Rolf has been a partner at ABACONS Treuhand GmbH since 2008 and is responsible for the development of the company, its internationally active clients and in particular for scale-ups. Previously, he worked for one of the large Swiss retail banks, KPMG Financial Services in Zurich, and as CFO of a FINMA-licensed securities dealer. Rolf is a qualified fiduciary expert, holds a Diploma of Advanced Studies from the University of Lucerne in Compliance Management and is a passionate certified Lego Serious Play Facilitator.