Rubuta ci gaba don wannan sakin layi - Daga 1959 zuwa 1960, Shagari shi ne majagaba Ministan Tarayya don Ci gaban Tattalin Arziki na Najeriya mai zaman kanta inda Ma'aikatarsa ke da alhakin zana shirin ci gaban 1962 <unk> 1968. Ma'aikatar Ci gaban Tattalin Arziki ta Shagari ita ce kuma ke da alhakin kafa Hukumar Ci Gaban Neja-Delta. Daga 1960 zuwa 1962, shi ne Ministan Tarayya na fansho wanda ya dauki nauyin aikin Nigerianization na ma'aikatar gwamnati. Daga 1962 zuwa 1965, an sanya Shagari Ministan Harkokin Cikin Gida na Tarayya. Daga 1965 har zuwa juyin mulkin soja na farko a watan Janairun 1966
, Shagari ya kasance Ministan Ayyuka na Tarayya kuma ya aiwatar da muhimman ayyuka da yawa ciki har da Eko Bridge Lagos wanda shine babban kwangilar farko na kamfanin gini na Jamus Julius Berger a Najeriya, da kuma kammala gadar Nijar wanda Firayim Minista, Sir Abubakar Tafawa Balewa ya ba da umurni a shekarar 1966. A shekara ta 1967 an nada shi sakataren Asusun Ci Gaban Ilimi na lardin Sokoto. Daga 1968 zuwa 1969, an ba Shagari matsayin jiha a Jihar Arewa maso Yamma a matsayin Kwamishinan Cibiyoyi.