The ADB team

Account leaders


Jürg Altorfer

Dr. oec. HSG, certified tax expert, Partner


Fabian Duss

MA in Business Administration, certified tax expert, LL.M. UZH International Tax Law, Partner


Marco Duss

Dr. iur., tax expert VSB, Counsel


Marco Greter

Dr. iur., tax expert, Counsel


Mathias Häni

lic. iur., certified tax expert, Director


Andreas Helbing

Dr. iur., LL.M. Taxation (LSE), attorney-at-law, certified tax expert, Partner


Britta Rehfisch

Diplom-Kauffrau, German and Swiss certified tax expert, Director, VAT specialist


Fabian Streule

MA in Economics HSG, certified tax expert, Director


Pascal Taddei

Dr. iur., attorney-at-law, certified tax expert, Partner


Urs Zeltner

Dr. iur., attorney-at-law and certified notary, Partner


Team members


Theodor A.J. Ambauen

MLaw, attorney-at-law, certified tax expert


Patrick Balz

MAS FH in Taxation/LL.M. Taxation, MLaw, BA in Business and Economics


Marco Buchmann

M.A. HSG, certified tax expert


Marc Dietschi

M.A. HSG, certified tax expert


Manuel Dubach

attorney-at-law, M.A. HSG in Law and Economics


Michael Felber

Dr. rer. oec., LL.M. UZH in International Tax Law, MAS FH in Taxation, M.A. HSG, B.A. HSG


Olivia Schwarz

MAS in VAT, lic. in International Relations


Helen Spiegel

Bachelor of Science in Business Law


Back office


Reception desk/personal assistants, accounting, back office