hiː wʌzɐ pɹəfˈɛsɚɹ æt ðə kˈɑːɹnəɡi ˈɪnstɪtˌuːt ʌv tɛknˈɑːlədʒi, ðə jˌuːnɪvˈɜːsᵻɾi ʌv ʃᵻkˈɑːɡoʊ, ðə dʒˈɑːnz hˈɑːpkɪnz jˌuːnɪvˈɜːsᵻɾi ænd ðˈɛn æt ðə mˌæsɐtʃˈuːsɪts ˈɪnstɪtˌuːt ʌv tɛknˈɑːlədʒi fɹʌm nˈaɪntiːnhˈʌndɹɪd fˈɪfti sˈɛvən ʌntˈɪl ðɪ ˈɛnd ʌv hɪz kɚɹˈɪɹ.
He was a professor at the Carnegie Institute of Technology, The University of Chicago, the Johns Hopkins University and then at the Massachusetts Institute of Technology from 1957 until the end of his career.