[1][2] He previously coached Ghanaian teams; Nania FC, Kpando Hearts of Lions and Berekum Chelsea.
Walker is a CAF License A holder and has coached several clubs in Ghana including Nania FC,[1][3] Tudu Mighty Jets,[4] Kpando Hearts of Lions and Berekum Chelsea.
[5] Nania scored giants Kumasi Asante Kotoko 1–0 in the final at the Accra Sports stadium to win the club's first major top flight trophy.
[2] In January 2021, he took a sick leave which resulted in the appointment of Yaw Preko and Godwin Attram to serve as head coach and assistant respectively.
[14] In November 2020, Walker disclosed that he was poised and ready to handle any national team job should he be given the opportunity to serve in one.