We have been on the market since 2001. Our membership in both relevant professional associations TREUHAND SUISSE and EXPERTsuisse as well as the approvals by RAB together with the permanent training of our employees guarantees you high-quality services.
Digitalization has been a reality for us since 2001 and not just a buzzword. Our accounting data has been in the cloud since the beginning – before this term even existed. For more than ten years, our processes have been largely paperless, standardized and based on an extended quality assurance system. Our customers have access to extensive, constantly updated and improved samples and templates. This means the wheel does not have to be reinvented each time.
Thanks to the language skills of our employees and our membership in the international network of leading fiduciary companies of INPACT von we are the right partner for cross-border cases.
We strive for a long-term partnership with our customers, employees and the authorities. The WIESER Treuhand Group sees itself as a fair partner that values open and committed interaction.
Stefan Wieser has founded the group in 2001. Before that he worked amongst other positions at PwC in Switzerland and abroad. Stefan Wieser has a degree as business economist HWV, a diploma as swiss certified public accountant, is certified VAT specialist and licensed audit expert. Stefan Wieser himself has extensive experience in any kind of finance, tax and administration. He is board member, manager and director of about two dozen companies and an experienced entrepreneur. Stefan Wieser personally takes care of demanding annual financial statement, every audit- and challenging consulting mandate. In his leisure Stefan Wieser is a passionate sailor, who races against other boats, organizes blue water cruises and has crossed the Atlantic several times. With his motorcycle he explores the countries along the silk road. Further, Stefan Wieser is a member of the old boys network “Die Nothensteiner“.
Direct +41 (71) 394 03 16
Boba Kaiser is a valuable pillar of our team since 2004 and became manager in 2010. She did her apprenticeship at a fidcuciary company and has ever since worked in this field. Boba Kaiser is specialized in annual financial statements, payroll accounting, human resource management and tax returns for individuals and corporations. Boba Kaiser is married and mother of a son and a daughter. In her leisure she likes to read and swim.
Direct +41 (71) 394 03 18
David Hildbrand joined our team in 2022. He takes care of customers from the monthly accounting to the closing of the annual accounts. In October 2022 successfully completed the accounting diploma edupool.ch. He is also currently pursuing further training to become a certified fiduciary with federal certificate. In his spare time he likes to tinker with his computer or go snowboarding.
Direct +41 (71) 394 03 14
Damira Domina joined our team in 2022. Her main responsibilities include managing the accounting for our own companies and preparing tax returns for individuals. In October 2025, she also began further training to become a finance and accounting clerk. In her free time, she enjoys sports, spending time with her loved ones, and traveling.
Direct +41 (71) 394 03 17
Luca Dellenbach joined our team in 2024. He has a Bachelor in business administration and has already an apprenticeship in the accounting sector. As a manager, he supports his clients in the areas of accounting and the preparation of annual financial statements. In his free time, Luca Dellenbach can often be found in the kitchen or hiking in the Swiss mountains.
Direct +41 (71) 394 03 13
Direct +41 (71) 394 03 15
Emira Ademi started her apprenticeship in the summer of 2025 and is simultaneously attending the vocational baccalaureate school – the perfect combination of theory and practice. With great care, she handles the accounting for our own companies and supports private individuals with their tax returns. In her free time, she enjoys spending time with family and friends or expressing her creative side through drawing
Pascal Bütler is a part of our team since 2024. He has a degree in business administration and is a swiss certified public accountant and licensed audit expert. He has several years of experience in external auditing as a mandate manager for small and medium-sized companies. Pascal Bütler has in-depth knowledge of the preparation and auditing of financial statements in accordance with the Swiss Code of Obligations and IFRS. In his free time, he enjoys spending time in nature and the mountains.
Social commitment
We are engaged and characterized by persistence. We support among others since our foundation the aid organisation Coup de Pouce Vietnam. We know the volunteers of the association in Hanoi partly personally.
