Wenger Vieli Ltd

David Siegenthaler primarily focuses on VAT consulting and provides tax advice to both individuals and legal entities on national and international matters.

“During my studies, I explored the intersection of business and law. This interdisciplinary approach inspired me to pursue a career in tax law, as taxation perfectly embodies this cross-disciplinary field. I am fascinated by the opportunity to work with numbers while addressing complex legal issues and developing tailored solutions for our clients. I find balance in my professional life through kitesurfing and spending time with friends and family.“

At present in training to become a certified tax expert; Since 2025 Associate at Wenger Vieli Ltd.; 2025 University of St. Gallen (M.A. HSG in Law & Economics); 2023-2025 Tax Intern at Wenger Vieli Ltd.; 2023 University of St. Gallen (B.A. HSG in Law and Economics); 2017-2019 Private Banking at Credit Suisse (Schweiz) AG; 2017-2018 Passerelle program; 2014-2017 Training as Banking Specialist with vocational diploma at Credit-Suisse (Schweiz) AG

German and English