After finishing his higher education with a civil aviation engineering degree, he returned to CAR and worked at
ACESNA. However, his career at ACENSEA was ended in 1976 due to the coup plot. On 16 February 1976, while M'Pokomandji and
ICAO officials inspected the
Bangui M'Poko International Airport runway, a grenade was thrown at Bokassa when he was to board a flight to
N'Délé. Although the grenade failed to explode, M’pokomandji and the other ACESNA officials were called to the Council of Ministers for questioning. Later, he wrote and sent a letter to his colleague in
Toulouse, Joseph Ndoro, about the coup in which the coup plotters were arrested and some were exiled. The country's censorship service prevented the letter from reaching Ndoro since it was considered "an act of subversion against Bokassa". This letter caused M'Pokomandji to be arrested. M'Pokomandji was sentenced to nine years in prison and fined 300,000 CFA francs by a military tribunal. He was jailed in
Ngaragba Central Prison for nine months and shared a cell with political prisoners and highway robbers. On 4 December 1977, Bokassa gave M'Pokomandji and other hundred prisoners amnesty on the occasion of the
Coronation of Bokassa I and Catherine on the condition that they were prohibited from taking jobs in public administration. Upon his release from detainment, M'Pokomandji became a businessman. He opened a small beverage business called Carrefour in Bangui, which attracted expatriate customers. Later, an expatriate who also became his loyal customer offered him a job as warehouse manager at Oubangui-Automobiles, and he accepted. Subsequently, he resigned and got a new job as an Air Transport Expert at the
United Nations Economic Commission for Africa (ECA) in
Addis Ababa. After the fall of the Bokassa regime, the Central African Republic rejoined ASECNA, and he became the country's representative. However, he was dismissed as the Central African Workers’ Union (USTC) was dissolved due to the long strike. Nevertheless, he later reentered ASECNA and was posted in
Dakar and later
Paris for four years. M'Pokomandji left ASECNA in 2000 and returned to Bangui, where he and his younger brothers established a freight forwarding company called Mondial Air Fret (MAF). == Political career ==