She served as head of three separate ministries in Pierre Nkurunziza's government and was Secretary-General of Burundi's Truth and Reconciliation Commission.
[2] She was appointed Minister of Civil Service, Labour and Social Security by Nkurunziza in a cabinet reshuffle on 14 November 2007.
[6][7] Niragira was appointed Minister of National Solidarity, Human Rights and Gender by Nkurunziza on 7 November 2011.
[9] In October 2014, acting in her ministerial capacity, Niragira assisted those in Muramvya Province where torrential rain and hailstorms had destroyed 56 homes and damaged crops.
[11] Niragira returned to the commission for the 58th session where she revealed that Burundi had achieved equal numbers of boys and girls in primary education and the implementation of a quota system to encourage the employment of women in public services.
[1] From December 2020 Niragira was appointed regional director of an organisation in Kampala, Uganda, working to provide training in the field of gender-based sexual violence.