The new appointees will take the oath of office at State House Dar es Salaam on Monday.
Tanzanian President Samia Suluhu Hassan reshuffled her cabinet on Sunday, just months after she reshuffled it in April.
Ms Stergomena Tax has been appointed as Minister for Foreign Affairs and East African Cooperation, replacing Liberata Mulamula, according to a statement issued by the Directorate of Presidential Communication.
Ms Tax was the first woman to serve as Defence Minister prior to her new position.
MS Tax has been replaced as Minister of State in the President’s Office Regional Administration and Local Government by Innocent Bashungwa.
President Samia also appointed Ms Angela Kairuki to replace Bashungwa in the President’s Office Regional Administration and Local Government.