He successively worked at the Permanent Interstate Committee for drought control in the Sahel, becoming in 1988 the interim director of one of its structures, the Centre d'Etudes et de Recherche sur la Population pour le Développement.
[3] This change originated from the rallying to the government of the opposition leader Wadel Abdelkader Kamougué, who was thus elected President of the National Assembly with the support of the MPS on May 9.
[6] Ouaido was eventually replaced two years later, on December 13, 1999, and succeeded by Nagoum Yamassoum,[7][8] also of the ruling party and considered a close aide of Déby.
It is believed that Ouaido's expected removal was motivated by two main reasons: the failure to quell the insurgency led by the former Minister of Interior Youssouf Togoïmi and the difficulties with the Doba oilfield project, abandoned by the oil companies Elf Aquitaine and Royal Dutch Shell.
[12][13] On February 29, 2008,[14] Ouaido was appointed by Déby to head an international commission of inquiry into the disappearances of opposition leaders who were allegedly arrested by the government earlier in the month.