After being scouted in Senegal during his time with Orlando City Academy Affiliate, Sport Galaxy, Mbengue played with
Orlando City in the
2012 Walt Disney World Pro Soccer Classic at the age of 19 and later joined
USL PDL club
Orlando City U-23, where he made 10 appearances in 2012. On 21 June 2012, Mbengue was promoted to Orlando City's senior roster, making him the first player in club history to be promoted from the U23s to the pro side. He made his professional debut the following day in a 3–0 win over the
Harrisburg City Islanders. In the
2013 Lamar Hunt U.S. Open Cup, Mbengue made a major impact on Orlando City's run to the quarterfinals. He scored in a second-round win over the
Ocala Stampede and set up
Long Tan for the only goal of the game in a 1–0 upset of
Major League Soccer club and defending tournament champion
Sporting Kansas City on 12 June. In June 2017, Mbengue joined
Ligue 1 side
Caen on a four-year contract. On 19 July 2021, he signed a one-year contract with
Châteauroux in the third tier. ==International career==