Six years as head of department (Oberregierungsrat) in the financial administration of NRW
- Head of department in the Appeals, Assessment, Survey and Evaluation Unit
- Steuerreferent in der Oberfinanzdirektion NRW
- Head of department in the tax investigation department as well as in the criminal case and fine department
Einjährige Tätigkeit im Bundeszentralamt für Steuern (BZSt)
- Fines and criminal cases office (tax and criminal investigations of Cum/Ex )