Bethlehem Steel Moumbagna spent time with the Florida-based Montverde Academy before signing with
United Soccer League side
Bethlehem Steel. He joined the club permanently on 16 July 2018. Moumbagna would establish himself as a goalscoring threat for Steel FC during the
2019 season, scoring 11 goals; breaking the team single-season record (10) previously held by
Seku Conneh. After the 2019 season, it was announced that Moumbagna was out of contract and would become a free agent. He made 38 appearances and scored 14 goals for Steel FC.
Kristiansund In May 2020, Moumbagna signed a three-year contract
Kristiansund BK competing in
Eliteserien, the highest division of
Norwegian football. He made his competitive debut on 21 June, coming on as a late substitute for
Sondre Sørli in a 7–2 league victory against
Aalesunds FK. His first goal, coincidentally, also came against Aalesund. In a 2–1 away win in the league, Moumbagna headed home a cross from
Liridon Kalludra to secure the equaliser, before Kalludra himself scored the winner. Faris Moumbagna made a total of 24 appearances for Kristiansund BK in the
2020 season; all in the league, as he scored four goals.
SønderjyskE On 26 August 2021, he joined
SønderjyskE on loan. Making his full debut for the club in the third round of the
Danish Cup on 23 September, Moumbagna scored his first goal in a 4–3 away win over
B 1913. His league debut followed four days later, coming off the bench to replace
Emil Kornvig in the 82nd minute of a 1–0 loss to
AGF.
Bodø/Glimt On 12 January 2023, Moumbagna joined
Bodø/Glimt on a four-year contract.
Marseille On 20 January 2024, Moumbagna signed a four-and-a-half-year contract with
Ligue 1 club
Marseille, for a reported transfer fee of €8 million. == International career ==