Medical technologist Princeton (New Jersey) Hospital, 1958-1960. Instructor medical technical school George Washington University, Washington, 1960-1962, research assistant, 1976-1977. Research microbiologist Environmental Biospherics, Inc., Rockville, 1978-1980.
Group leader environmental microbiology department Atlantic Research Corporation, Alexandria, Virginia, 1980-1989. Private practice consultant microbiologist Potomac, Maryland, since 1989. Senior technical advisor ARCTECH, Inc., Chantilly, Virginia, 1989-1992.
Adjunct professor George Mason University, 1988-1992, research professor, 1992—2007, professor emeritus since 2007. Consultant Orkand Corporation, Silver Spring, Maryland, 1979-1980, United States Department of Energy, Pittsburgh, 1988-1989. Consultant Advancis Pharmaceutical, Gaithersburg, Maryland, since 2001, member science advisory board, since 2003, consultant Ciris Energy Centennial, Co, since 2008.
Science fair judge Montgomery and Fairfax County Schools, Maryland and Virginia, since 1975. Board directors Bedford (Pennsylvania) Springs Music Festival, 1984-1989. Member American Society for Testing and Materials (vice chair 1983-1992, 99-2002), American Society for Microbiology, American Society for Clinical Pathologists, Cosmos Club, Phi Kappa Phi, Phi Sigma, Chi Beta Phi.
1958 - 1960
1960 - 1962
1978 - 1980
1980 - 1989
1989 - 1992
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