Meet the Chairs

Markey Johnson

Health Canada, Ottawa, ON, Canada

Dr. Johnson has over 15 years of experience in environmental exposure and epidemiology.  Markey earned her PhD at the University of Michigan conducting community based participatory research to examine housing characteristics, social determinants, and environmental health among Arab Americans.  As a postdoctoral fellow at the U.S. Environmental Protection Agency, she designed and conducted participant-based air monitoring, developed land use regression models, and linked air pollution exposure to biomarkers and health.  For the past 8 years Dr. Johnson has designed and led studies assessing air pollution exposure and health as a senior researcher in the Air Health Science Division of Health Canada.  Her research includes the development of air pollution models integrating land use regression, regulatory monitoring, satellite remote sensing, and chemical transport models – as well as linkage of air pollution and health.  Her current interests include critical developmental windows and source-specific exposure and health analyses.  Dr. Johnson has been an ISES member for 10 years.


Angelika Zidek

Health Canada, Ottawa, ON, Canada

Angelika Zidek is a Senior Manager at Health Canada responsible for leading human health risk assessments and exposure methodology for existing chemicals. She has amassed over 15 years of experience in the regulatory domain of exposure assessment, waste management and pollution abatement, leading regulatory risk assessments of both pesticides and industrial chemicals including estimation of exposure and risk for susceptible populations, workers and the general population under both the Canadian Environmental Protection Act and the Pest Control Products Act.  Her areas of passion within the exposure science field include children’s health, human biomonitoring, occupational and consumer exposures, chemical priority setting and assessment. She continues to work closely with researchers and risk assessors in exploring new exposure tools, approaches, and models as well as emerging chemical contaminants.  She has also been the Canadian delegate on the OECD Working Party on Exposure Assessment for the last 8 years working with international partners on exposure related projects and issues.


Audrey Smargiassi

Université de Montréal, Montreal, QC, Canada

Audrey Smargiassi is an associate professor at the Department of Environmental and Occupational Health at the School of Public Health of the University of Montreal; she is also an associate researcher at the Quebec Institute of Public Health. She has a vast expertise on health risks and population impacts of environmental exposures such as air and noise pollution and climate change. She directed the development of varying approaches to estimate exposure of large populations (i.e. statistical, numerical, using GIS and satellite imagery). She also conducted a number of environmental epidemiology studies mainly using governmental and survey data, to assess associations with environmental exposures. She is currently directing multidisciplinary work aimed at assessing health impacts of transportation and land use scenarios. The aim of her research is to provide evidence for the mitigation of the health impacts of environmental exposures and to orient health protection programs.


Veronica Vieira

University of California, Irvine, CA, USA

Veronica Vieira is an Associate Professor in the Program in Public Health at the University of California, Irvine, U.S. Her research involves spatiotemporal analyses of health data for examining the contributions of known risk factors and environmental exposures to the underlying geographic pattern of disease risk. She works extensively with reconstructing historic environmental exposures using GIS and has an extensive knowledge of groundwater modeling and perfluorooctanoic acid (PFOA), a chemical involved in the manufacturing of Teflon. Dr. Vieira has been an investigator with the Boston University Superfund Research Program for 15 years where she investigates spatial and chemical/non-chemical patterns of ADHD-related behaviors and risky behaviors among children living the New Bedford Harbor Superfund site using generalized additive models (MapGAM). Her work also includes international collaborations with researchers in France, Sweden, Portugal, Denmark, and Italy.