klˈeɪtmən dʒˈɔɪnd ðɪ ɐplˈaɪd mˌæθɪmˈæɾɪks fˈækəlti æɾ ˌɛmˌaɪtˈiː ɪn nˈaɪntiːnhˈʌndɹɪd sˈɪksti sˈɪks, ænd wʌz pɹəmˈoʊɾᵻd tə pɹəfˈɛsɚɹ ɪn nˈaɪntiːnhˈʌndɹɪd sˈɪksti nˈaɪn.
Kleitman joined the applied mathematics faculty at MIT in 1966, and was promoted to professor in 1969.