Upon finishing her studies in Paris, she returned to the Central African Republic and worked as a central inspector of surface transportation at the Ministry of Transportation and Civil Aviation from 1972 to 1975. In February 1976, the government arrested Fayanga for being the relatives of one of the failed coup plotters, François Kossi. Nevertheless, she was released and served as the Secretary of State to the Presidency in charge of the Stabilization and equalization fund for agricultural products at the Council of the Central African Revolution on 4 September 1976. She also served as the Director of Price control in 1982. However, she was arrested together with
Lucienne Patassé and Agnes Mbaikoua in March 1982 following the
failed coup attempt. She then left MLPC and joined
PSD on 4 October 1991. Patasse appointed Fayanga as the transportation inspector in 1994. In the early 1990s, she was known for advocating multipartyism. Under the Bozize administration, Fayanga became the Ambassador of the Central African Republic to the Republic of Congo in 2004 and was stationed in
Brazzaville on 25 March 2005. She held the ambassadorial position until 2021. == Death ==