His contributions in that season helped Lorient to make a return to the top flight after a long spell in the lower leagues.

In the 2006–07 season, N'Guéma returned to Rennes, solely playing for their reserve side in the fourth tier, making 15 league appearances.

In July 2010, N'Guéma signed for Paris Saint-Germain II, making 19 league appearances, scoring six times.

[1] On 15 November 2003, N'Guéma made his debut for Gabon, scoring twice in a World Cup qualification tie against Burundi.

N'Guéma was included in the Gabonese squads for both the 2010 and 2012 Africa Cup of Nations, scoring against Niger in the latter tournament.