Tanja Liese joined the University of Cologne and the team as the assistant to Professor Claus Kreß in November 2020.

She is a Certified Management Assistant for Office Communication (CCI, Chamber of Commerce and Industry) as well as a Certified Foreign Language Correspondent for English (CCI). Following her apprenticeship Tanja Liese studied law at the universities in Frankfurt (Main) and Cologne but decided to become a university dropout, which she achieved. 

Prior to her position at the University of Cologne she worked, among other positions, as the assistant to the managing partner of a law firm and as an assistant to the head of a business field at a large service company. While she was working in an HR department she completed a twelve-month in-service training programme at the CCI leading to the qualification of Bachelor Professional of Human Resources Management (CCI).

Tanja Liese also has good knowledge of French and Dutch. 

Since 2021, she has been a member of the Faculty Council, representing the interests of technical and administrative staff.