ɪn nˈaɪntiːnhˈʌndɹɪd sˈɪksti θɹˈiː hiː mˈuːvd bˈæk tə ðə nˈæʃənəl sˈaɪəns faʊndˈeɪʃən æz dˈɛpjuːɾi dᵻɹˈɛktɚ, ɹᵻtˈɜːnɪŋ tə ðə jˌuːnɪvˈɜːsᵻɾi ʌv ʃᵻkˈɑːɡoʊ ɪn nˈaɪntiːnhˈʌndɹɪd sˈɪksti ˈeɪt æz vˈaɪspɹˈɛzɪdənt ænd dˈiːn ʌv fˈækəltiz.
In 1963 he moved back to the National Science Foundation as deputy director, returning to the University of Chicago in 1968 as vice-president and dean of faculties.