For years he was a leading member of the Congolese Movement for Democracy and Integral Development (MCDDI), but in 2013 he formed his own party, the Dynamic for the Republic and Recovery (DRD).
[1] Under serious pressure as a result of the 1997 civil war, President Pascal Lissouba appointed Kolélas, his old rival, as Prime Minister at the head of a national unity government in September 1997.
[1] Lissouba's attempt to secure his position through the formation of a national unity government was unsuccessful, however: the rebel forces loyal to Denis Sassou Nguesso captured Brazzaville in mid-October 1997,[4] and Mampouya, who had a firm personal loyalty to Kolélas,[2] fled into exile along with the MCDDI President on 14 October 1997.
[5] He was eventually allowed to return from exile to attend the funeral of his wife in October 2005; Sassou Nguesso granted Kolélas a special amnesty for the occasion on humanitarian grounds, enabling him to visit.
The meeting was notable for designating Brice Parfait Kolélas as the Coordinator of the MCDDI National Executive Bureau and National Secretary for Development Strategies, effectively making him the MCDDI's de facto leader in light of Bernard Kolélas' advanced age and failing health.
[20] As an ally of the PCT, the MCDDI supported Sassou Nguesso's bid for re-election in the July 2009 presidential election and Mampouya worked on his campaign.
In the statement, he criticized some opposition leaders for resorting to "bellicose, seditious, dangerous, and misleading" rhetoric that could threaten the prevailing "climate of peace", and he warned them against any actions disturbing public order.
[25] Mampouya, still serving as Minister of Fishing and Aquaculture, stood again for the seat representing the fourth constituency of Makélékélé in the July–August 2012 parliamentary election.
[29] As President of the DRD, Mampouya inaugurated a bridge in the Pool Department, connecting the Goma Tsé-Tsé and Mbanza-Ndounga districts, on 23 March 2014.
[30] On the same day, Mampouya also donated a generator to Kinkala's hospital—the most important hospital in the Pool Department—in order to remedy the power outages that plagued the facility.
[33] After Sassou Nguesso's victory in the March 2016 presidential election, he moved Mampouya back to the post of Minister of Scientific Research and Technical Innovation on 30 April 2016.