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.

Alina Dudler

"My passion for numbers combined with flexibility and team spirit to celebrate common successes motivates me to give my best every day."

  • About Alina

    Alina Dudler works in the ABACONS team as Head of Mandate. After her education with diploma as businesswoman (“dipl. Kauffrau EFZ”)  she has already gained profound experience in the fiduciary sector and is currently upskilling herself to become a fiduciary expert with a federal certificate.

Mirjam Lalive d’Epinay-Aebischer

"In my work, I find the ideal mix of numerical world and diversity, which offers new challenges and opportunities every day."

  • About Mirjam

    Mirjam is a trained businesswoman (“dipl. Kauffrau EFZ”) and works as a fiduciary clerk at ABACONS. She has many years of commercial experience in various industries.

Stéphanie Kern

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

  • About Stéphanie

    After completing her education as a businesswoman (“dipl. Kauffrau EFZ”) in public administration, Stéphanie gained professional experience in public administration and fiduciary services and is currently completing her upskilling as a fiduciary expert with a federal certificate. She is the Head of Mandate at ABACONS.

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 start-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.