[17][18] It had been widely expected that the post would go to a more prominent figure, but Sassou Nguesso chose Ngolo, reportedly viewing him as a skilled organizer and as relatively uncontroversial.

He was reportedly viewed as a "man of compromise": "an open conservative, anxious to preserve the identity of the party, while understanding the need for change".

On 17 August 2012, the parliamentary terms of Ngolo and the other two deputies were extended by the Constitutional Court until such time as voting could be held.

The ruling was in line with a constitutional provision allowing for such extensions when voting could not be properly held due to "exceptionally serious circumstances".

[20][21] Under Ngolo's leadership, the PCT won a parliamentary majority in the 2012 election, the first time it had done so since the introduction of multiparty politics.

On 28 February 2014, he visited constituents in Ouenzé who were still suffering from the effects of the 2012 explosions, listening to their complaints about the lack of progress in reconstruction.

"[26] Although many in the opposition saw the referendum as merely a means of allowing Sassou Nguesso to remain in power, Ngolo argued that it was necessary to change the constitution "for the future of the country, to ensure peace and stability".

[27] Ngolo confirmed on 25 April 2017 that he would stand for re-election as the PCT candidate in the first constituency of Ouenzé in the 2017 parliamentary election.