Seb was a key part of the Under-18s squad in 2024/25, which found success in both the Youth Alliance League South and the FA Youth Cup, reaching the quarter-finals. The midfielder’s energy and versatility were on show, scoring goals and providing assists in many competitions at the under-16s and -18s levels. He is a former student of Coombeshead Academy, who also played for Saints Southwest. Seb is a first-year apprentice for 2025/26.

On 23 September, 2025, Seb scored on his first-team debut, after coming on as a substitute in a 6-2 Vertu Trophy win over Spurs Under-21s. At 16 years and 279 days, this made him the youngest scorer in Argyle's history.