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Academic Credentials
  • Ph.D., Environmental Health Sciences, University of Michigan, Ann Arbor, 2015
  • M.S., Environmental Health, Harvard University, 2006
  • B.S., Anthropology, University of Michigan, Ann Arbor, 2003
Licenses & Certifications
  • Certified Industrial Hygienist (CIH)
  • NIOSH 582E: Sampling and Evaluating Airborne Asbestos Dust. Microscopy Instruction, Consultation & Analysis (MICA)
Academic Appointments
  • Sponsored Affiliate in the Occupational & Environmental Epidemiology Program, University of Michigan School of Public Health, 2015-2017
Professional Honors
  • Ä¢¹½tv HERO Award for Best Technical Achievement in a Project, 2021
  • Ä¢¹½tv HERO Award for Best Colleague Development, 2020
  • NIEHS Intramural Paper of the Month (Muñoz et al. 2018), November 2018
  • AIHA Conference Scholarship, 2015
  • AIHA John A. Leonowich Award (for educational excellence in non-ionizing radiation), 2015
  • University of Michigan Rackham Predoctoral Fellow, 2014-2015
  • University of Michigan Rackham International Travel Grant, 2013
  • National Institute for Occupational Safety and Health Graduate Fellowship, 2005-2006, 2011-2012
  • University of Michigan James B. Angell Scholar, 2004
  • University of Michigan University Honors, 2001-2003
Professional Affiliations
  • American Industrial Hygiene Association (AIHA), 2004-present
  • International Society of Exposure Science (ISES), 2013-present
  • International Society for Environmental Epidemiology (ISEE), 2023-present

Dr. Ryan Lewis is a Principal Scientist in Ä¢¹½tv's Health Sciences practice specializing in exposure science and environmental epidemiology. His scientific consulting and research focus on individual- and population-level evaluations of exposures and health effects in both occupational and non-occupational settings, including from consumer and industrial product use scenarios. He is particularly experienced with inhaled chemicals, biomarkers of chemical exposure, risk assessment of cancer and respiratory and reproductive health outcomes, literature reviews, and general causation (Bradford Hill) analyses. Examples of chemicals on which Dr. Lewis has been active include asbestos, cosmetic talc, ethylene oxide, glass fibers, metals, phthalates, and pesticides.

Dr. Lewis holds a Ph.D. in Environmental Health Sciences (Occupational & Environmental Epidemiology) from University of Michigan School of Public Health and an M.S. in Environmental Health (Industrial Hygiene) from Harvard School of Public Health. His PhD. dissertation research was at the interface of reproductive epidemiology and exposure science, focusing on longitudinal data collected from couples enrolled in the Environment and Reproductive Health (EARtH) study, which is a collaborative effort between Massachusetts General Hospital Fertility Center and Harvard University. While he was a Ph.D. student, Dr. Lewis was engaged in additional multi-institutional, environmental health research through prospective birth cohort studies in Mexico and Puerto Rico. His Ph.D. training directly involved study design, participant recruitment and data collection, statistical analyses of primary and secondary data, and literature reviews. Also, Dr. Lewis has been a board-certified industrial hygienist (CIH) since 2011, recertifying every five years thereafter.

Dr. Lewis has published 32 peer-reviewed scientific papers, which have been cited more than 1,200 times. His papers address three primary areas: 1) epidemiological analyses and systematic literature reviews of environmental exposures and health endpoints; 2) evaluations of exposure measurement error, exposure misclassification, and confounding in epidemiology studies; and 3) characterization, predictors, and contextualization of exposures. Dr. Lewis is on the editorial board of Frontiers in Public Health and was formerly on the editorial boards of Journal of Toxicology and Environmental Health and Toxicology and Industrial Health. He has also served as an invited reviewer for more than 20 scientific journals.