[1][2] Walker played youth soccer with the Ottawa St. Anthony Futuro Academy.
In 2023, he was invited to attend pre-season with Canadian Premier League club Atlético Ottawa, where he scored in a friendly against Spanish Primera Federación side UD San Sebastián de los Reyes.
[10] On August 2, with his U Sports contract set to soon expire, he signed an extension for the remainder of the 2023 season.
[11][12] Following his first professional start on August 13 against Pacific FC,[13][14] he was named to the CPL Team of the Week for the first time.
[16][17] Ahead of the 2025 season, he went on a training stint with their affiliate club in Mexico Atlético San Luis.