Who We Are

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

Our core competence lies in maintaining and developing comprehensive administrative services to provide our clients with what they need at the right time and in the right context. We take the pressure off and advise you so that you can concentrate on your business and your customers. Thanks to our network in the areas of tax, auditing, 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 its owner since 2005. She is responsible for the company's operational activities. Before taking over the management of ABACONS, Claudia worked for KPMG Zurich in the tax department. She then worked for a tax boutique in Zurich in the fiduciary sector.

Stéphanie Kern

“The combination of flexibility, open communication, varied challenges, and a great team spirit is what drives me.”

  • About Stéphanie

    After completing her training as a commercial clerk EFZ in public administration with an e-profile, Stéphanie gained professional experience in public administration and fiduciary services. As a fiduciary with a federal certificate, she works as a mandate manager at ABACONS.

Norina Felder

“I am driven by the combination of team spirit, open communication, and the opportunity to create real added value for our customers with competence and enthusiasm.”

  • About Norina

    After completing her commercial training with a vocational baccalaureate, Norina gained professional experience in financial accounting at an international company. Since September 2024, she has been studying part-time for a master's degree in Accounting & Controlling at the ZHAW, which she is expected to complete in summer 2026. Norina has been working as a junior fiduciary at ABACONS since August 2025.

Mirko Kutlesa

“I am driven by the joy of understanding complex topics, transforming numbers into tangible insights, and working together as a team to create solutions that really matter.”

  • About Mirko

    After completing his training as a commercial clerk EFZ in fiduciary and real estate services, Mirko went on to complete further training as a specialist in finance and accounting and has many years of experience in the fiduciary sector. He has been working as a fiduciary account manager at ABACONS since September 2025.

coming soon

“Start as a fiduciary clerk in April 2026. We look forward to seeing you.”

Rolf M. Wüthrich

“Understanding my clients' ambitions and visions and contributing to 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 international clients, and scale-ups in particular. Previously, he worked for one of Switzerland's major retail banks, KPMG Financial Services in Zurich, and as CFO of a FINMA-licensed securities dealer. Rolf is a certified fiduciary, holds a diploma in compliance management from the University of Lucerne, and is a passionate certified Lego Serious Play Facilitator.