Ian Peel will leave his position as England Under-20 head coach to assist the senior team at the upcoming Six Nations as scrum coach.
The 39-year-old won back-to-back Junior World Championship titles and the Under-20 Six Nations during his tenure with the youth side, which began in 2013.
England head coach Eddie Jones has made numerous changes to the backroom staff after replacing Stuart Lancaster at the helm, with forwards coach Graham Rowntree, backs coach Andy Farrell and skills coach Mike Catt all leaving their posts.
Peel, who has also agreed to join the coaching staff at Saracens, is delighted to have the chance to team up with Jones in a part-time capacity at the Six Nations.
"This is a huge opportunity and I am really looking forward to getting stuck in with lots of the guys who I have worked with through the age-group teams but also when I have gone in and helped Graham Rowntree over the last few seasons," he told England Rugby's official website.
"It is a huge honour to go and deliver that for the seniors and joining up with Eddie, [forwards coach] Steve Borthwick, [defence coach] Paul Gustard and the rest of the team."
England begin their Six Nations campaign against Scotland at Murrayfield on February 6.