From 1975 to 2006 he was head  of the Department of Urology at the Hospital St. Elisabeth in Straubing, Germany, until his retirement 2006. Since 1992 he is Associate Professor of Urology at the Technical University of Munich.

He was President of the Paul Ehrlich Society for Chemotherapy (1997-1999), and President of the International Society for Antimicrobiel Chemotherapy  (2005-2009).

He was chairman of the European Section for Infections in Urology (2001-2007) and the panel for the EAU guidelines "Urological Infections”, both Working Groups of the European Association of Urology (EAU).

His scientific interest mainly comprises urological infections