Dr. Fenske's work has focused on the evaluation of environmental health risks in special populations, such as children, farm workers, and farm producers. Specialty areas include health risks of pesticide exposures, development of new exposure assessment methods, and investigation of the role of skin exposure for workers and children. He has also worked on the impact of climate change on human health in Washington State. His teaching activities include exposure assessment, environmental risk, and public health policy related to pesticides. He received the 2006 NIOSH Director’s Award for Excellence in Research and the 2007 Jerome Wesolowski Award for Outstanding Contributions to the Field of Exposure Science from the International Society of Exposure Science He currently serves as a member of National Academy of Medicine Roundtable on Environmental Health Sciences, Research, and Medicine. In 2008-2009 Dr. Fenske was Chair of the Institute of Medicine's Committee to Review the Health Effects of Vietnam Veterans of Exposure to Herbicides (Seventh Biennial Update), and served from 2006-2009 as a member of the Environmental Protection Agency's Human Studies Review Board. He also authored the Chemical Hazards section of the International Labor Organization’s Protocol on Agricultural Health and Safety in 2009. He recently served as Co-Chair, Technical Advisory Group on Climate Change, Human Health and Security, Washington State (2010-12).