hiː wʌz pɹəmˈoʊɾᵻd tʊ ɐsˈoʊsɪˌeɪt pɹəfˈɛsɚɹ ʌv baɪˈɑːlədʒi æt wˈɑːʃɪŋtən jˌuːnɪvˈɜːsᵻɾi ɪn sənt. lˈuːi ænd ˈɔːlsoʊ ɐsˈoʊsɪˌeɪt pɹəfˈɛsɚɹ ʌv dʒɪnˈɛɾɪks æt ðɛɹ skˈuːl ʌv mˈɛdəsən ɪn nˈaɪntiːnhˈʌndɹɪd sˈɛvənti sˈɪks.
He was promoted to associate professor of biology at Washington University in St. Louis and also associate professor of genetics at their School of Medicine in 1976.