He was the ANDP's candidate in four presidential elections, beginning in 1993; he was also a deputy in the National Assembly from 1999 to 2009 and the President of the High Court of Justice from 2005 to 2009.
[3] Djermakoye entered the military as a young officer, and took part in Seyni Kountché's April 1974 coup which overthrew President Hamani Diori.
After his defeat, he formed a group called the Club of Moumouni Adamou Djermokoye's Friends (CAMAD), which later became the ANDP.
After the military, led by Ibrahim Baré Maïnassara, seized power in January 1996,[10] a new presidential election was held in July 1996, in which Djermakoye took fifth place with 4.77% of the vote.
[19] Following another coup in April 1999, Djermakoye was made President of the National Consultative Council during the transitional period prior to new elections.
[11] On November 4, he announced his support for Mahamadou Issoufou, the candidate of the Nigerien Party for Democracy and Socialism, in the second round of voting.
[30] On May 24, 2005, Djermakoye was elected as President of the High Court of Justice, a special judicial body composed of National Assembly deputies.
Observers noted that in doing so he averted the possibility of being placed on trial for treason at the High Court of Justice, with Djermakoye presiding.
[35] Djermakoye, who was reported to have previously suffered from a heart condition, died at a Niamey hospital[2][34] thirty minutes later.