1990 Ph. D. with Prof. Vogelpohl, TU Clausthal (with honors)
1991-2004 Head of the Water Treatment Group, TU Clausthal
Since 2000 Consultant, TECHNOCON GmbH, Clausthal,
1991-2004 Assistant Professor, TU Clausthal
1999-2002 Lecturer (Akademischer Rat) at TU Clausthal
2002-2004 Lecturer (Akademischer Oberrat) at TU Clausthal
since 15.12.2004 Professor and head of the Environmental
Process Engineering Chair, Technische Universität Berlin
since 2022 Professor Nanjing University of Technology China