Felix Geiger
| 1994-1996 | Federal Tax Administration, main department VAT, legal department |
| 1996-1999 | Federal Tax Administration, main department VAT, division legislation |
| 1996-1999 | Member of the VAT legislation committee of experts |
| 1999-2000 | VAT consultant at PricewaterhouseCoopers, Zurich |
| 2000–2002 | Partner of an enterprise specialising in the field of VAT |
| since2002 | Partner of VAT Consulting AG |
| 2004–2006 | Lecturer at the Swiss Distance University of applied sciences in post-diploma studies "national and international VAT-law" |
| since2005 | Lecturer at the veb.college "Swiss VAT-Certificate Training" |
| 2006 | Member of the expert group of the Federal Tax Administration for the reform of the Law on Value Added Tax |
| since2010 | Lecturer at the veb.college "EU VAT-Certificate Training" |
| 2012 | Editor Commentary Swiss VAT Act |
| since2013 | Lecturer expert course for audit "Modul Tax & Legal / VAT" (EXPERT SUISSE) |
| 2014 | Co-author of Commentary Swiss VAT Act (editor Zweifel / Beusch / Glauser / Robinson) |