North London-based Jameson joined the Hatters' Academy as an Under-12.
He appeared regularly in the Under-18s, making two FA Youth Cup appearances, before starring for the Under-21s in their debut Premier League Cup campaign in 2023/24.
Jamo signed a contract extension in January 2024, then gained his first senior experience with a loan spell at Southern League Premier South club Dorchester Town in the second half of the season.
He returning at the beginning of the 2024/25 pre-season, spending the summer with the first team and being named on the substitutes' bench for the first time in the Championship for the game at Preston.