 Nyora kupfuurira kweiyi ndima - Kubva muna 1984 kusvika muna 1987, Kerwin akashanda soMutungamiriri weSpace and Life Sciences paJohnson Space Center. Ikoko, aive nebasa rekutungamira uye kuronga rutsigiro rwezvokurapa kune anoshanda mapurogiramu emuchadenga, kusanganisira hutano hwehutano nekugadziriswa kwevashandi vemuchadenga nemhuri dzavo; kutungamira kwebasa rehupenyu, kutsigira kutsvagisa uye chirongwa chekuedza chiedza; uye nekutarisira JSC sainzi yepasi uye kuyedza kwesainzi mukutsvaga kwemwedzi nepuraneti. Muna 1986, akabudisa mushumo pamusoro pekufa kwevashandi vakaurawa munjodzi yeChallengerKumubatsiri Mukuru Wezvokufamba Munzvimbo, Richard H. Truly. 