John Meeker has been involved in research projects that span a range of topics in environmental and occupational health. Recent interests include exposure assessment and epidemiology studies investigating health impacts associated with exposure to pesticides, PCBs, tobacco smoke, and other agents, as well as approaches to evaluate, minimize, and account for exposure measurement error in epidemiology studies. Other related research interests are the study of exposure biomarkers, environmental factors associated with reproductive health, and assessment of occupational exposures and engineering controls within the construction industry.