Speech clinician Brooklyn College Clinic, City University of New York, Brooklyn, 1963, Bergen Pines County Hospital, Paramus, New Jersey, 1963-1964. Vocational Rehabilitation administration trainee Cleveland Hearing and Speech Center, 1964-1966. Speech clinician Benjamin Rose Hospital, Cleveland, 1965-1966.
National Institutes of Health career investigator trainee Case Western Reserve University, 1966-1968, research associate in dental education, 1967-1968. Assistant professor department communication disorders University Oklahoma Medical Center, Oklahoma City, 1968-1969, director diagnostic services in speech pathology, 1968-1969. Assistant professor department communication science and disorders University South Florida, Tampa, 1969-1971, associate professor, 1972-1976, professor, since 1976, director diagnostic services, 1969-1971, director research in communicology, since 1976, acting director program in speech pathology and audiology College Social and Behavioral Science, 1971, director, 1971.
Professor, program developer communicative disorders and science School Medical Rehabilitation, University Manitoba, Winnipeg, Canada, since 1991. Visiting professor phonetics U.E.R. Angellier University Lille (France), 1984. President Cypher Research Consortium.
Fellow Royal Society Health, Academy for Forensic Application of Communication Process. Member American Speech and Hearing Association, Florida Speech and Hearing Association, International Society Phonetic Science, Institute for Advanced Study of Communication Process, Computer Users Speech & Hearing.