After Denis Sassou Nguesso returned to power at the conclusion of the June–October 1997 civil war, he appointed Ndouane to the government as Minister of Tourism and the Environment on 2 November 1997.
[7] In the National Assembly, Ndouane was also assigned responsibility for handling inter-parliamentary relations with the African, Caribbean and Pacific Group of States and the European Union on 23 August 2002.
[19] Ndouane met with a delegation from the United Nations Development Programme on 2 August 2013 for a discussion about renewable energy.
[20] He met with the visiting Speaker of the Iranian Parliament, Ali Larijani, on 8 March 2014 to discuss cooperation between Congo-Brazzaville and Iran.
[24] Nevertheless, he did not receive a post in the Bureau of the National Assembly when the legislature began meeting for the new parliamentary term on 19 August 2017.