The reshuffling was announced at the ongoing Federal Executive Council (FEC) meeting at the Presidential Villa in Abuja.
Buhari also swore in the seven ministers recently screened and confirmed by the Senate.
Before the swearing in, a minute silence was observed in honour of Mohammed Barkindo, the 4th Secretary-General of the Organisation of Petroleum Exporting Countries (OPEC), who died at the age of 63, Tuesday night.
The first batch to be sworn in were Henry Ikechukwu Ikoh – Abia State, Umana Okon Umana – Akwa Ibom State, Odum Odih – Rivers State and Ademola Adewole Adegoroye – Ondo State.
The second batch included Umar Ibrahim El-Yakub – Kano State, Goodluck Nnana Opiah – Imo State and Egwumakama Joseph Nkama – Ebonyi State
In attendance physically at FEC are Vice President Yemi Osinbajo; Secretary to the Government of the Federation (SGF), Boss Mustapha; and Chief of Staff to the President, Prof Ibrahim Gambari.
Head of the Service of the Federation (HOCSF), Dr. Folasade Yemi-Esan, and other ministers are attending the meeting from their offices.
The ministers present include the Attorney General of the Federation and Minister of Justice, Abubakar Malami, Labour and Employment, Chris Ngige, Education, Adamu Adamu, Communication and Digital Economy, Isa Pantami, Mines and Steel, Olamilekan Adegbite, Minister of State for Petroleum Resources, Timipre Sylva, and Minister of State Budget, National Planning, Clem Agba and State, Industry Trade and Investment, Maryam Katagun.