[1] Originally from Greenwich in London, Jackson began playing rugby at Blackheath F.C., progressing through the club's minis and junior sections.
[9] Over the following two years, he was dual-registered with Ampthill and played the majority of his rugby in the RFU Championship, whilst also featuring for his parent club in the Premiership Cup.
[10] Jackson was notably Ampthill's top try scorer during the 2023–24 Championship season, crossing the whitewash 14 times in 17 appearances for the team.
[11] Ahead of the 2024–25 Premiership season, Jackson was promoted into the Saracens senior squad, before earning his first league start against Northampton Saints in December 2024.
[12] He also finished the 2024–25 cup campaign as the club's top try scorer, touching down 7 times in 6 matches.