On 26 July 2023, he helped oust President Mohamed Bazoum.

[1] Barmou received training in the United States, both at Fort Moore and the National Defense University.

[2] In 2015, Barmou, who at the time was the Head of Niger's special forces, stated in an interview that Niger was conducting operations against Boko Haram to ensure security and peace.

On 26 July 2023, he joined the National Council for the Safeguard of the Homeland, the junta that ousted President Bazoum, who served from 2021 until the military coup occurred.

According to Nigerien sources, Barmou was also involved in the encirclement of the Bazoum Presidential palace.