Olivier Mbaissidara Mbaizo (born 15 August 1997) is a Cameroonian professional footballer who plays as a defender for the Philadelphia Union of Major League Soccer and the Cameroon national team.

[3] In January 2018, Mbaizo signed for Bethlehem Steel FC, the USL affiliate of the Philadelphia Union.

By April 2018, Mbaizo was signed to Bethlehem Steel's MLS affiliate Philadelphia Union after impressing with the first team during preseason training.

[5] He made his first team debut for the Union in September, starting in a 2–0 win over Sporting Kansas City.

[8] Mbaizo earned his first senior call-up in November 2020 for the 2021 Africa Cup of Nations qualifying matches.