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Thomas Wirth

Thomas Wirth

Partner – Audit Financial Services

Thomas Wirth is Head of the Service Line Audit Financial Services of Grant Thornton in Switzerland.

Professional experience

Thomas Wirth worked for several years as a foreign exchange dealer with a major Swiss bank. This was followed by six years at a Big 4 company where he worked as a bank auditor. He has worked for Grant Thornton since 2005 and has been a partner and auditor with responsibility for banks, securities dealers and collective capital investments since 2006.

Professional qualifications and memberships

Thomas Wirth is a certified accountant and holds a Bachelor in Business Administration (BBA). He is an auditing expert recognised by the Swiss Federal Audit Oversight Authority (FAOA) and a registered accountant in Liechtenstein. In addition, he holds specialist law licences for the auditing of banks and securities dealers, collective capital investments, asset managers of collective capital investments and representatives of foreign collective capital in-vestments.

Thomas Wirth is a member of the Expert Committee for Collective Capital Investments at EXPERTsuisse.


In addition to his mother tongue German, Thomas Wirth speaks fluent French and English.

  • certified accountant
  • Bachelor of Business Administration
  • auditing expert
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