T.J. Lentz is a lead health scientist/research occupational hygienist and Chief of the Science Applications Branch with the National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention (NIOSH/CDC). Dr. Lentz conducts research to evaluate occupational and environmental hazards, with projects and interests that include investigation of small business industries and their hazards; assessment of safety hazards in construction trades; and evaluation of toxicology and epidemiology data on chemical and physical agents to determine health risks and appropriate prevention strategies. Dr. Lentz is particularly interested in studying how design, planning, and control engineering can be used to address safety and health challenges in the work environment. Major duties include developing informational materials and guidance for other agencies, industry, labor groups, and the public. Dr. Lentz previously served as the Policy Response Coordinator for the Institute. Dr. Lentz earned a B.A. degree in biology/philosophy from Wittenberg University (1989), an MPH in environmental health sciences/health policy from Yale University (1991), and a PhD in environmental health/industrial hygiene from the University of Cincinnati (1997).