Brendan Rodgers has moved to secure Chris Davies as his assistant at Celtic.
Davies, who worked with the new Hoops boss at Swansea City and Liverpool, will join the Scottish champions on June 1 from Reading where he is currently first-team coach.
Ulsterman Rodgers, whose presentation as Ronny Deila's successor on Monday brought an estimated 13,000 fans to Celtic Park, told the club's official website: "I am delighted to bring Chris to Celtic. He is a magnificent coach and someone I know will make a hugely positive contribution to the club.
"He is ready and prepared for the challenge at Celtic and I know that Chris, like myself, can't wait to get going.
"He has worked with me previously, he is someone I know and trust and he will be a great addition."
Davies said: "Celtic is a huge club with such a special place in world football. It is a great honour and a proud moment for me to be named assistant manager.
"I have worked with Brendan over a number of years, as a player and a coach, and it will be fantastic to team up with him again. I know all about his affection for Celtic.
"I am looking forward to meeting all the players and staff and working with them to give the fans a team to be proud of."