ˈæxmɛd wʌz ɐpˈɔɪntᵻd ɐ fˈækəlti mˈɛmbɚɹ ʌvðɪ ˌɛndʒɪnˈɪɹɪŋ dᵻpˈɑːɹtmənt, kˈeɪmbɹɪdʒ ɪn nˈaɪntiːnhˈʌndɹɪd sˈɪksti θɹˈiː ænd wˈɜːkt ðɛɹ fɔːɹ twˈɛnti jˈɪɹz bᵻfˌoːɹ mˈuːvɪŋ tə ðə fˈɪzɪks dᵻpˈɑːɹtmənt wˌɛɹ hiː wʌz pɹəmˈoʊɾᵻd tə pɹəfˈɛsɚɹ ʌv mˌaɪkɹoʊᵻlɛktɹˈɑːnɪks ænd wʌzðə hˈɛd ʌvðə mˌaɪkɹoʊᵻlɛktɹˈɑːnɪks ɹᵻsˈɜːtʃ sˈɛntɚɹ ʌntˈɪl hɪz ɹᵻtˈaɪɚmənt ɪn tˈuː θˈaʊzənd θɹˈiː.
Ahmed was appointed a faculty member of the Engineering Department, Cambridge in 1963 and worked there for 20 years before moving to the Physics Department where he was promoted to Professor of Microelectronics and was the Head of the Microelectronics Research Centre until his retirement in 2003.