1975-99, various roles, Minnesota Department of Health, last 15 years as state epidemiologist and chief of Acute Disease Epidemiology Section; 2001-05, Special Advisor to HHS Secretary; 2005, National Science Advisory Board on Biosecurity. Currently: Director, Center of Excellence for Influenza Research and Surveillance, CIDRAP; Professor, Division of Environmental Health Sciences, School of Public Health; Adjunct Professor, Medical School, University of Minnesota. Former personal advisor to late King Hussein of Jordan. Member, Institute of Medicine, National Academy of Sciences. Editor, CIDRAP Business Source, a web-based information system for pandemic and other disease threats to business. Author.