Career
Mbonabucya was considered a valuable goalscorer for K. Sint-Truidense V.V. during his time at the club After an injury, Mbonabucya moved to KVK Tienen. On 20 February 2009, he signed for United States Albert who plays in Schaerbeek and eighteen months contract.
Along with teammate Claude Kalisa, Mbonabucya forms the backbone of the Rwandan national team that participated in the 2004 African Nations Cup.
Mbonabucya began his coaching career on 20 February 2009 as Youth Head Coach from United States Albert in Schaerbaek.