 Ramba uchinyora ndima iyi - Muna 1983, pashure pemakore anenge gumi okubatanidzwa kwepakati nepakati nehurongwa hweSpace Shuttle, Silveira akava Injiniya Mukuru weNASA. Pashure penjodzi yeChallenger yepaSpace Shuttlemuna January 1986, akashanda neboka rakazvimirira rokuongorora kuti riongorore zvakakonzera njodzi yacho. Silveira akarega basa kuNASA muna 1987, kunyange zvazvo akaramba aine ukama hwakawanda nesangano racho. Akashanda kwenguva pfupi kuFord Aerospace Corporation, asati ava chipangamazano kuUnited States Department of Defense. 