A relative of President Omar Bongo, Ngari rose rapidly through the ranks of the army, ultimately serving as Chief of Staff of the Armed Forces from 1984 to 1994.
Considered one of Gabon's most powerful figures during Omar Bongo's rule, Ngari is a member of the Gabonese Democratic Party (PDG).
[6] Soon after the destruction of Radio Liberté, President Bongo appointed Ngari to the government as Minister of Defense, Security, and Immigration in March 1994.
[7] After the 1996 election, Ngari remained Minister of Defense, Security, and Immigration, and he was assigned additional responsibility for posts and telecommunications on 28 January 1997.
[11] However, he was moved to the position of Minister of Transport and the Merchant Marine[7][12] on 25 January 1999,[12] and his rival, Ali Bongo, was appointed to replace him at the Defense Ministry.
[21] Bongo officially prevailed in the 30 August 2009 presidential election, defeating Mamboundou and an array of other challengers;[20] upon taking office, he immediately dismissed Ngari from the government on 17 October 2009.
[20][22] Ngari's dismissal was part of a major reworking of the state administration, in which many prominent ministers and officials were replaced.
[24] Like Omar and Ali Bongo, Ngari is a Muslim, belonging to a faith that is practiced by only a very small percentage of the native Gabonese population.