Career
He represents Gabon in international competition. Mayimba moved from Gabon to the United States in 2011. He played his sophomore and junior seasons at Montrose Christian School in Rockville, Maryland under head coach Stu Vetter and averaged 8.9 points in the latter year.
Following Vetter"s resignation at Montrose Christian, Mayimba transferred to Saint James School in Hagerstown, Maryland to play his final season in 2013.
While completing high school, he was approached by several National Collegiate Athletic Association Division I college basketball programs such as George Washington, Delaware, Rhode Island, and UAB. However, he chose to play for George Mason. Mayimba said, "The location is cool, being able to stay in the Department of Motor Vehicles. The coaching staff really showed me that I was important to them, and I like the guys on the team
They also have the majors that I want. The business department is strong and they have a music major, too." He was a three-star recruit, according to Entertainment and Sports Programming Network, and the 9th best prospect in the state.
Entering college, Mayimba saw ineligibility issues with the National Collegiate Athletic Association (National Collegiate Athletic Association) Eligibility Center.
He was not allowed to play in his freshman season due to problems with his foreign transcript. On June 11, 2015, Gabon national basketball team head coach Thierry Bouanga announced that Mayimba would be part of the team"s 21-man preliminary squad for the AfroBasket 2015.