stˈæfɪŋ lˈɛvəl, ɪŋklˈuːdɪŋ sˈɪvəl sˈɜːvɪs ænd ˈɑːnsaɪt kəntɹˈæktɚz, hɐz ɹˈeɪndʒd bᵻtwˌiːn fˈɪftiːn ænd wˈʌnhˈʌndɹɪd ˌoʊvɚ ðə lˈaɪf ʌv ˌɛnˌɛsˈɛsdˌiːsˌiːˈeɪ.
Staffing level, including civil service and onsite contractors, has ranged between 15 and 100 over the life of NSSDCA.