Intern University Hospitals, Madison, Wisconsin, 1961-1962. Resident in public health and preventive medicine United States Public Health Service, 1962-1964. With Department of Health, 1965-1982.
Deputy director Bureau Foods, Food and Drug Administration, Washington, 1970-1971, associate director science, 1972-1982. Assistant surgeon general United States Public Health Service, 71-82. President Nutrition Foundation, Inc., 1982-1984.
Director Kolbye Associates, since 1985.