As a member of the Central African Democratic Rally (RDC), Nguendet served for a time as a Deputy in the National Assembly,[2][3] representing the fifth arrondissement of Bangui, the capital.

When the Séléka rebel coalition captured Bangui in March 2013, ousting President François Bozizé, Nguendet's party was reportedly the first party to recognize the leadership of Michel Djotodia, the rebel leader who declared himself President after Bozizé fled the country.

[2] In April 2013, under pressure from regional leaders, Djotodia attempted to legitimize his rule by creating the National Transitional Council,[4] a 105-member provisional parliament, and then being elected by the new CNT as President, to serve during a planned 18-month transitional period, on 13 April 2013.

[2] When the CNT began working in early May 2013, Nguendet explained to the body that it would have all normal legislative powers during its existence, with the exception of the right to hold a vote of no confidence in the government.

[6] After Djotodia resigned following a CEEAC summit on 10 January 2014 as a result of his failure to contain escalating sectarian violence, Nguendet took over as Acting President.