Mark Mendell, Ph.D., is an affiliate of the Indoor Environment Group at ETA, and an Air Pollution Research Specialist at the California Department of Public Health. Dr. Mendell is on the editorial board of the journal Indoor Air and a member of the International Academy of Indoor Air Sciences. He was formerly at the Centers for Disease Control/National Institute for Occupational Safety and Health, where he was head of the National Occupational Research Agenda Team on Indoor Environments. Dr. Mendell holds a BA from Cornell University; a Bachelor of Landscape Architecture from the University of Oregon; and a PhD in epidemiology from the University of California at Berkeley, School of Public Health. Dr. Mendell has worked for 20 years in the field of environmental epidemiology, focused on health effects related to indoor environments in buildings. His work includes field research to help understand relationships between specific factors and conditions in buildings and health effects in occupants, and critical reviews of the literature that summarize what we know, how well we know it, and what we do not know, about specific environment/health relationships in buildings. His research interests include health risks associated with buildings, ventilation systems, moisture, and microbial growth; effects of indoor environments in schools on health and performance of students, and effects of indoor chemical exposures in residences on asthma and allergies.