Achilles Wellis

Swiss certified fiduciary expert / MAS UAS in fiduciary and consulting
MAS UAS in Swiss and international taxation / LL.M. Swiss and international taxation

+41 44 905 19 13


D, E

Practice areas

  • Corporate tax law
  • Tax consulting for individuals and companies
  • VAT consulting
  • Management consulting / company valuations / liquidations
  • Accounting and annual statutory financial statements
  • Personnel administration / payroll / social insurance consulting


  • Alumni Kalaidos UAS Switzerland, network of graduates of the Kalaidos University of Applied Sciences


Achilles Wellis joined Pfister Treuhand AG in 2019. Since 2021, he has been a partner, co-owner and member of the executive management. 

He has many years of professional experience in finance, consulting and taxation. At the beginning of his career, Achilles Wellis had been working several years for a small fiduciary company. Later, he switched to an internationally operating company, where was the Head of Finance and Accounting for many years. Most recently, Achilles Wellis worked as a mandate manager for a medium-sized fiduciary company and was responsible for complex national and international mandates for more than 10 years.

Achilles Wellis is married and has one daughter. He likes spending his free time with his family and sports. He is very interested in Scottish culture and history due to his personal experience and he also loves reading books about it.