Since 2022 Guest Scientist at the Leibnitz Institute for Freshwater Ecology and Inland Fisheries, Dept. Community and Ecosystem Ecology

Since 2019 Private consultant on toxic cyanobacterial management for the World Health Organisation, Health Canada and the Greater Beirut Water Supply Project

2008 – 2018 Head of Division Drinking-Water and Swimming-Pool Hygiene of the Federal Environmental Agency of Germany

1992 – 2008 Head of Section Drinking-water Resources and Treatment of the Federal Environment Agency of Germany

1991 – 1992 Senior research scientist at the Institute for Water-, Soil- and Air Hygiene of the Federal Health Agency of Germany

1987 – 1991 Research scientist in the DFG-funded Project “algal-borne taste-and odour substances“ at the Institut for Water-, Soil- and Air Hygiene

1981 – 1987 Research scientist at the Free University of Berlin; Faculty of Biology: university teaching contracts; Environmental research contracts for the state of Berlin and for the Federal Environment Agency 

Education

1972-1982: Free University, Berlin, Biology. Dissertation on „Production, respiration, assimlation and net production efficiency of Daphnia longispina from Heiligensee” (Prof. Tilzer, Technical University Berlin) in the context of the “Ecosystem Study Heiligensee”

1959-1972: Elementary School in Alabama, USA and John-F-Kennedy Highschool, Berlin