| Professional Career |
| 5/1990–6/1992 | Resident in Urology, Bunderswehrzentralkrankenhaus Koblenz, Abteilung Urologie |
| 30.06.1992 | Doctoral thesis „Etiology and pathogenesis of urolithiasis in rats with portocaval anastomosis“, Dept. Of Urology, University Hospital Bochum (Prof. Dr. med. Th. Senge), summa cum laude |
| 7/1992-5/1993 | Resident, Urologische Universitätsklinik Tübingen |
| 6/1993-5/1994 | Resident, Dept. Of Surgery, Kreiskrankenhaus Hechingen |
| 6/1994-7/1995 | Resident, Urologische Unversitätsklinik Köln |
| 8/1995-10/1996 | Research Fellowship, Urological Oncology, Walter Reed Army
Medical Center und Armed Forces Institute of Pathology,
Washington, USA (DFG He 2618/1-1) |
| 08.12.1996 | Board exam in Urology, Staff Urologist, Dept. Of Urology, University of Cologne |
| 01.07.1997 | Head Urologist Dept of Urology, University of Cologne |
| 13.05.1998 | Associate Professor of Urology, „Molecular, immunohistochemical and pathohistological parameters in pathogenesis and prognosis of testicular germ cell tumours“ |
| 01.02.1999 | Head Urologist, Dept of Urology, University Marburg |
| 01.01.2004 | Head, Division of Oncological Urology, University of Cologne |
| 01.12.2008 | Chairman and Director, Department of Urology, University Hospital, RWTH Aachen, Germany |
| 29.05.2015 | Doctor honoris causae, Carol-Davila-University, Bucarest, Romania |
| 01.09.2015 | Director and Chairman, Department of Urology, University of Cologne |
