Glenn W. Suter II is Science Advisor in the U.S. Environmental Protection AgencyÕs National Center for Environmental Assessment-Cincinnati. He has a Ph.D. in Ecology from the University of California, Davis, and 32 years of professional experience including 27 years of experience in ecological risk assessment and ecological epidemiology. He is the principal author of three texts in the field of ecological risk assessment, editor of three other books and author of more than a hundred open literature publications. He is Associate Editor for Ecological Risk of Human and Ecological Risk Assessment, and Reviews Editor for the Society for Environmental Toxicology and Chemistry (SETAC). He has served on the International Institute of Applied Systems Analysis Task Force on Risk and Policy Analysis, the Board of Directors of SETAC, an Expert Panel for the Council on Environmental Quality, and the editorial boards of five journals. He is the recipient of numerous awards and honors; most notably, he is an Elected Fellow of the American Association for the Advancement of Science; and he received SETACÕs Global FounderÕs Award, their award for career achievement, and the EPAÕs Level 1 Scientific and Technical Achievement Award. His research experience includes development and application of methods for ecological risk assessment and ecological epidemiology, development of soil microcosm and fish toxicity tests, and environmental monitoring. His work is currently focused on the development of methods for determining the causes of biological impairments.