Dr. Guy W. Sewell holds the Robert S. Kerr Endowed Chair and the rank of professor of environmental health sciences at East Central University (ECU) in Ada, Oklahoma. In 2007, he was appointed as the Executive Director of the newly formed Institute for Environmental Science Education and Research (IESER). Prior to coming to ECU in 2002, he was a Research Microbiologist with the U.S. EPA at the Robert S. Kerr Environmental Research Center (1988-2002), where he served as principle investigator, Acting & Assistant Branch Chief, and as a research team leader. Guy is an internationally recognized expert in the areas of subsurface fate and transport, and the biotreatment of hazardous waste. He has published over 50 papers on topics such as water resources, ecology, environmental cleanup and bioprocesses, and has made scientific presentations at numerous national and international meetings. He has served on various environmental technical review panels for industry and government agencies such as U.S. EPA, DoD, DOE, USGS, NATO, and ITRC. Guy joined the ITRC Enhanced Attenuation: Chlorinated Organics (EACO) team in 2006.

Guy earned a bachelor's degree in 1980 and a doctoral degree in 1987 in microbiology from Oklahoma State University in Stillwater, Oklahoma. He then accepted a Gas Research Institute postdoctoral fellowship in molecular biology at the University of Florida, focused on the genetic engineering of ethanol production in bacteria. He completed Environmental Economics Program at the John F. Kennedy School of Government, Harvard University in 2000, and in 2001 completed a sabbatical as a Visiting Researcher in bioinformatics at the University of Oklahoma.