ɪn nˈaɪntiːnhˈʌndɹɪd sˈɛvənti tˈuː, hiː bɪkˌeɪm ɐn ɐsˈɪstənt pɹəfˈɛsɚɹ æt ðə jˌuːnɪvˈɜːsᵻɾi ʌv sˈaʊθ kˌæɹəlˈaɪnə, ɐsˈoʊsɪˌeɪt pɹəfˈɛsɚɹ ɪn nˈaɪntiːnhˈʌndɹɪd sˈɛvənti fˈaɪv, ænd fˈʊl pɹəfˈɛsɚɹ ɪn nˈaɪntiːnhˈʌndɹɪd ˈeɪɾi.
In 1972, he became an assistant professor at the University of South Carolina, associate professor in 1975, and full professor in 1980.