The 45-year-old, who was at the club from 2001-2004 as a player and as a coach from 2019, wants to pursue senior coaching.
Speaking to Town's official website, he said: It's a bitter-sweet situation for me. It's been an amazing five years which have given me so much. I
t was certainly a whirlwind, from helping Nathan and the team achieve Championship survival to playing a part in the development of so many young players in the under-21s group and leading them in the Premier League Cup.
"It was a really tough decision to move away one that was too good to turn down but I leave with an under-21 set-up that I believe can blossom and I would like to thank Gary Sweet, Andy Awford, Paul Benson and every player and member of staff that I have worked with along the way."