Daga nan sai ta koma Baltimore,Maryland, a Amurka,inda ta shafe shekaru tara tana aiki da na'urar hangen nesa ta Hubble.A cikin 1999,Daou ya koma ƙungiyar da ke shirin ƙaddamar da na'urar hangen nesa na Spitzer Space,inda ta yi aiki a cikin ilimi da wayar da kan jama'akuma ta taimaka wajen gano Tsarin Bincike na Space Space na Spitzer don Malamai da Dalibai.Ta shiga hedkwatar NASA a shekara ta 2006,kuma ta yi hidima a cibiyar a ayyuka daban-daban, ciki har da Jami'ar Ilimi da Wayar da Kan Jama'a. Ta zama Daraktan Ilimi da Wayar da Kai ga Jama'a a Cibiyar Nazarin Lunar NASA - Cibiyar Bincike ta Ames, a cikin 2008 da NASA Solar System Exploration Research Virtual Institute(SSERVI)Mataimakin Darakta a 2010.Ta kasance mai himma sosai a cikin shirye-shiryen tallafin NASA. Tun daga 2018,ta ci gaba da aikinta a matsayin masanin falaki a hedkwatar NASA a Washington, DC, kuma tana aiki a matsayin Babban Masanin Kimiyya,a matsayin Jami'in Shirye-shirye kuma Babban Jami'in Ma'aikata na Daraktan Sashin Kimiyya na Duniya a cikin Daraktan Ofishin Jakadancin Kimiyya(2014-Yanzu).