Bachelor of Science, University Maryland, 1952. Master of Science, University Maryland, 1954. Doctor of Philosophy, University Maryland, 1958.
Assistant professor Department Zoology, University Maryland, College Park, 1958-1959. Research entomologist Canada Agriculture, Ottawa, 1960. Scientist National Institutes of Health, United States Public Health Service, Canal Zone, Panama, 1960-1962.
Scientist director Rocky Mtn. Laboratory, National Institutes of Health, United States Public Health Service, Hamilton, Montana, 1962-1982. Professor Department Veterinary Microbiology, Washington State University, Pullman, 1982-1985.
Research professor Department Infectious Diseases, University Florida, Gainesville, 1985-1992. Research fellow Veterinary Research Institute, Onderstepoort, Republican South Africa, 1992-1995. Director Tickconsult, Port Ludlow, Washington, since 1995.
Consultant in field; adjunct professor University Idaho, Moscow, 1982-1985. Chief-of-party United States Agency for International Development/Zimbabwe/Heartwater Research Project, Harare, 1985-1991. Affiliated professor department zoology University Montana, Missoula, 1971-1975, University Florida, 1990-1992.
Officer B.P.O. Elks, Hamilton, 1964-1967. With United States Navy, 1947-1948. Fellow American Association for the Advancement of Science.
Member American Society Parasitologists (emeritus), American Society Tropical Medical Hygiene, Entomological Society of America, Society Vector Ecologists, Society Invertebrate Pathology, School In Vitro Biologists.
Married Samira Louise Abozeid, 1958. Children: Conrad Erhardt, Dina L., Samira E., Lawrence O.