Dr John Budroe
Dr. John Budroe is Chief of the Air Toxicology and Risk Assessment Section of the Office of Environmental Health Hazard Assessment (OEHHA) in the California Environmental Protection Agency. He received a Ph.D. in Interdisciplinary Toxicology from the University of Arkansas for Medical Sciences, Little Rock AR. Dr. Budroe has 29 years of experience in performing non-cancer and cancer human health risk assessments on environmental chemicals in the California Proposition 65, Toxic Air Contaminant and Air Toxics Hot Spots programs.
Dr. Qiaoxiang (Daisy) Dong
Dr. Daisy Dong joined the Department of Pesticide Regulation (DPR) in 2016. She is currently a Staff Toxicologist serving in the Risk Assessment Section of DPR's Human Health Assessment Branch. Dr. Dong is DPR's lead risk assessor for the fumigant sulfuryl fluoride and was part of the team that completed the 2018 risk assessment of the insecticide chlorpyrifos. She has primary expertise in inhalation toxicology, dosimetry modeling, physiologically-based pharmacokinetic (PBPK) modeling, benchmark dose analysis and dietary exposure assessment. She is also a member of the California Pesticide Residue Monitoring Program team, where she conducts health risk evaluations for exposure to pesticide residues on fresh food commodities. Dr. Dong received a BS in Biology from Zhejiang University, China and a PhD in Wildlife and Fisheries Science from Louisiana State University. She did postdoctoral work at the University of California at Davis and at the University of Texas Health Science at San Antonio. Prior to joining the Department of Pesticide Regulation, Dr. Dong was a full professor at Wenzhou Medical University, China, where she used the zebrafish and mammary stem cell models to study toxicity pathways of perfluorooctanesulfonic acid (PFOS), bisphenol A (BPA), and polybrominated diphenyl ethers (PBDEs) among other prominent environmental toxicants. She is the author of more than 100 peer-reviewed publications and serves as a peer reviewer for several major toxicology journals. Her current research interests are focused on new approach methodologies in human health risk assessment.
Dr. Jefferson Fowles
Dr Fowles received his PhD in Toxicology from Oregon State University in 1993. He has since worked in the U.S. and internationally in public health, regulatory toxicology, and product safety for the California EPA, the New Zealand government, and chemical industry R&D in Europe. He is currently Staff Toxicologist for the California Department of Public Health, Environmental Health Investigations Branch, where he has worked on the EVALI vaping disease outbreak and other environmental contaminant investigations and risk assessments. He has 72 peer-reviewed publications.
Dr. John Stanek 
Dr. John Stanek is a Toxicologist with the Center for Public Health and Environmental Assessment (CPHEA). In this role, John provides scientific leadership and expertise in the area of inhalation risk assessment to the U.S. Environmental Protection Agency and our international partners. John has served on international, agency, and interagency workgroups focused on a variety of topics including acute reference concentrations, urban air toxics, superfund guidance, hydraulic fracturing research prioritization, and the assessment of hydraulic fracturing on drinking water. He has developed assessments that provide the scientific basis that support Agency risk management actions through the Agency’s Integrated Risk Information System (IRIS) and Integrated Science Assessment (ISA) programs. Many of these efforts directly support CPHEA’s and the Agency’s mission, improve the state-of-the-science of risk assessment, and provide guidance and scientific support to other risk assessors, risk managers, and client program offices, which, as a result, helps to support risk decisions and regulatory recommendations on federal, state, and international levels.
Dr. Susan Tilton
Dr. Susan Tilton is an Associate Professor and Director of Academic Programs in the Environmental and Molecular Toxicology Department at Oregon State University. Her background is in molecular and computational toxicology with expertise in the development of advanced cell culture models for toxicity testing. Her current research focuses on utilization of 3D in vitro models to improve understanding of adverse health effects in multiple organ systems, with particular focus on respiratory disease from inhaled pollutants. Dr. Tilton has a B.S in Biology from Duke University and Ph.D. in Toxicology from Oregon State University. She was previously a Senior Research Scientist at Pacific Northwest National Laboratory and serves on advisory boards for the National Toxicology Program and the Cosmetic Ingredient Review in addition to review panels for the National Institute of Environmental Health Sciences.
Dr. John J. Vandenberg
Dr. Vandenberg is an Adjunct Professor at the Nicholas School of the Environment, Duke University, where he teaches air quality-related courses, and he recently served as Director of the Health and Environmental Effects Assessment Division at the US Environmental Protection Agency (retired, 2021). He has over 35 years of experience in environmental health risk assessment and was responsible for leadership, planning and oversight of EPA’s Integrated Science Assessments for the major (criteria) air pollutants and Integrated Risk Information System (IRIS) assessments for high priority hazardous air pollutants, and for development of new risk assessment methodologies. He is a graduate of the College of Wooster, Ohio, and received his M.S. and PhD in biophysical ecology from Duke University.