Billy began skiing at a young age in France during the winters, progressing quickly to become a standout on the Alpine circuit. During the 2020-21 season, Billy secured two Europa Cup victories winning the overall EC Slalom title in the process, while also making his World Cup debut in 2020 in Alta Badia. In 2022, Billy recorded his first World Cup top-30 finish with 24th place in Madonna di Campiglio having represented Team GB at the Beijing Olympic Winter Games earlier that same year.
Billy’s best World Cup finish to date came in Hafjell in March with a ninth place finish, while he also impressed at the Saalbach World Championships finishing 15th on a proud day for British Alpine skiing.