Competing in men's singles, he won ten international medals, including two on the ISU Challenger Series, and became a five-time Swiss national champion (2013–14, 2016–18).

Competing in Ice Dance with former partner Arianna Wroblewska, he is a two-time Swiss national silver medalist.

In September 2013, Walker competed at the Nebelhorn Trophy, the last qualifying opportunity for the 2014 Winter Olympics, but his placement, 15th, was insufficient to earn a spot in Sochi, Russia.

By December 2015, Walker was training under Franca Bianconi and Rosanna Murante in Sesto San Giovanni, Italy.

CS: Challenger Series; JGP: Junior Grand Prix Media related to Stéphane Walker at Wikimedia Commons