Dr. Cornelis A.M. (Kees) van Gestel studied Environmental Sciences at Wageningen University, the Netherlands. From 1981-1986, he was scientific advisor on the ecotoxicological risk assessment of pesticides and from 1986-1992 head of the Department of Soil Ecotoxicology at the National Institute of Public Health and the Environment (RIVM) in Bilthoven, the Netherlands. He obtained his PhD from Utrecht University in 1991. Since 1992, Kees van Gestel has been Associate Professor of Ecotoxicology at the Department of Animal Ecology of the Vrije Universiteit (VU) in Amsterdam. He is teaching undergraduate and postgraduate courses on various topics from basic biology to ecotoxicology and supervising undergraduate and PhD students working on various aspects of ecotoxicology. He is author or co-author of over 200 papers and book chapters, member of the editorial boards of Ecotoxicology, Ecotoxicology and Environmental Safety and Environmental Pollution, and Environmental Toxicology and Chemistry and editor of Applied Soil Ecology (since 2009).