Assistant professor audiology University Iowa Hospital, 1970-1974, associate research scientist, 1975-1976. Associate professor University California, Santa Barbara, 1976-1984, professor audiology, 1984-1988. Chairman department audiology and speech pathology Memphis State University, 1988-1992.
Dean School Audiology and Speech-Language Pathology University Memphis, since 1993. Program director speech and hearing science University California, Santa Barbara, 1980-1982.
Fellow American Speech-Language-Hearing Association, Society Ear Nose and Throat Advance in Children. Member American Academy Audiology, International Electrical Response Audiology Study Group, International Society Audiology, Tennessee Association Audiology and Speech-Language Pathologists, Sigma Xi.