About Us
Locally rooted.
Nationally connected.
Mission
Close and personal.
Collective reach.
Trusso is a new fiduciary group for ambitious SMEs. Five hubs in Switzerland, a shared network, the same goal: to strategically guide SMEs. From daily operations to the next growth phase.
We combine classic fiduciary excellence with modern platform power. Locally present, strong in our network. It's that simple. It's that consistent.
Managing Partners

Adrian Schaller
Managing Partner / Director
Chartered Accountant
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Josia Röhm
Managing Partner / Director
Chartered Accountant
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Christoph Thommen
Managing Partner
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Our Leadership Team

Martin Dettwiler
Partner
Certified Tax Expert
Partner
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David Klein
Partner
Chartered Accountant
Partner
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Thomas Koller
Chairman of the Board
Certified Fiduciary Expert / Licensed Audit Expert
Verwaltungsrat
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Antonio Marin
Partner
Certified Public Accountant / Special Authorization for VAG Audits
Partner
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Renzo Peduzzi
Partner
Chartered Accountant
Partner
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Josia Röhm
Managing Partner / Director
Chartered Accountant
Geschäftsführend
Verwaltungsrat
Partner
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Adrian Schaller
Managing Partner / Director
Chartered Accountant
Geschäftsführend
Verwaltungsrat
Partner
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Emil Walt
Partner
Certified Public Accountant / Special Authorization for VAG Audits
Partner
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