Darren Moore has left his role at West Brom to join Blackburn as first-team coach.
The 38-year-old, who was working as a professional development coach at Albion, is one of three new appointments to Michael Appleton's backroom staff.
Luke Dowling and Chris Neville, who both worked at Appleton's former club Portsmouth, join as head of senior recruitment and head of sports science.
Moore said: "When the gaffer asked me to come up here and be part of his staff, I was really excited and I can't wait to get started.
"We were team-mates together at West Bromwich Albion and after sustaining an injury early in his career, the gaffer started to pick up his coaching credentials.
"My career continued, but we've always kept that friendship going and we find ourselves working together."
Appleton said: "I'm delighted to welcome Chris, Luke and Darren to the club. I feel like we have put together a strong backroom team to add to the fantastic staff already in place."