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)
Academic Appointments
  • Sponsored Affiliate in the Occupational & Environmental Epidemiology Program, University of Michigan School of Public Health, 2015-2017
Professional Honors
  • Exponent HERO Award for Best Technical Achievement in a Project, 2021
  • Exponent 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 Exponent's Health Sciences practice. He has more than 15 years of scientific consulting and research experience in the areas of exposure science, industrial hygiene, and environmental epidemiology. He was educated at the University of Michigan (B.S. and Ph.D.) and Harvard University (M.S.). His work involves the evaluation of exposures and health effects at the individual and population levels, in occupational and non-occupational settings, and from consumer and industrial product use scenarios. He is experienced with a wide range of agents such as asbestos, bisphenol A, ethanol, ethylene oxide, glass fibers, heavy metals, non-asbestiform minerals, pesticides, phthalates, power-frequency magnetic fields, silica, talc, and wood dust.

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) epidemiologic analyses and systematic literature reviews of environmental exposures and health endpoints; 2) evaluation 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.