Columbia University in the City of New York
Professor
The University of Iowa
Professor Emeritus
US Environmental Protection Agency (EPA)
U.S. EPA Science Advisory Board
Centers for Disease Control and Prevention
Presidential Appointee - NIOSH - Advisory Board on Radiation and Worker Health
The University of Iowa
Deputy Director - NIOSH - Heartland Center for Occupational Health and Safety
UC Berkeley
Health Physicist
The University of Iowa
Professor
Millersville University of Pennsylvania
University of Iowa
