Bachelor of Science, University Maryland, 1973. Doctor of Philosophy, University Maryland, 1979. Postdoctoral fellow, University Washington, 1981.
Laboratory instructor Mount Vernon College, Washington, 1974. Graduate research assistant University Maryland, College Park, 1975—1979. Senior fellow University Washington, Seattle, 1979—1981.
Assistant professor University Maryland School Medicine, Baltimore, 1981—1984, associate professor, 1984—1990, professor, since 1990. Member science advisory board Microscience Ltd., London, since 1998. Consultant National Institutes of Health, Bethesda, 1988—1992.
Fellow: American Association for the Advancement of Science, American Academy Microbiology. Member: American Society Microbiology.
Married Carol Overton Tacket. Stepchildren: David Rogawski, Elizabeth Rogawski.