hiː kəntˈɪnjuːd tə wˈɜːk wɪð skˈɑːt æz ɐn ˌɛsˌɑːɹsˈiː pˈoʊstdəktɚɹəl ɹᵻsˈɜːtʃ fˈɛloʊ ænd dʒˈuːnjɚ ɹᵻsˈɜːtʃ fˈɛloʊ ʌv wˈʊlfsən kˈɑːlɪdʒ, ɪn ˈɑːksfɚd, ʌntˈɪl nˈaɪntiːnhˈʌndɹɪd sˈɛvənti sˈɪks, wˌɛn hiː mˈuːvd tə ðə jˌuːˌɛsˈeɪ, fˈɜːst æz ɐ vˈɪzɪɾɪŋ ɐsˈɪstənt pɹəfˈɛsɚɹ ʌv mˌæθɪmˈæɾɪks æt klˈɑːɹk jˌuːnɪvˈɜːsᵻɾi ɪn wˈʊstɚ, mˌæsɐtʃˈuːsɪts, ðˈɛn, fɹʌm nˈaɪntiːnhˈʌndɹɪd sˈɛvənti sˈɛvən tə nˈaɪntiːnhˈʌndɹɪd ˈeɪɾi tˈuː, æz dʒˌeɪˈɛf ɹˈɪt ɐsˈɪstənt pɹəfˈɛsɚɹ ʌv mˌæθɪmˈæɾɪks æt kəlˈʌmbiə jˌuːnɪvˈɜːsᵻɾi ɪn nˈuː jˈɔːɹk.
He continued to work with Scott as an SRC postdoctoral Research Fellow and Junior Research Fellow of Wolfson College, in Oxford, until 1976, when he moved to the USA, first as a Visiting Assistant Professor of Mathematics at Clark University in Worcester, Massachusetts, then, from 1977 to 1982, as JF Ritt Assistant Professor of Mathematics at Columbia University in New York.