Portsmouth have appointed Stuart Gray as their new first-team coach on a two-year deal.
Gray, 51, has held managerial positions at Southampton and Northampton and was a coach at Aston Villa, Crystal Palace and Wolves.
Blues boss Steve Cotterill told BBC Radio Solent: "I'm pleased to bring Stuart onboard, he's settled in really well, which was important to me."
Cotterill continued: "I've known Stuart for a long time and I've had him in my mind for a while.
"He's had a couple of sessions with the players and they've enjoyed it so far, so I'm pleased with how it's gone so far."
Pompey secured a 4-0 victory over Havant & Waterlooville in a pre-season friendly at West Leigh Park on Monday.
New signings Luke Varney, Greg Halford, David Norris and Jason Pearce featured for the Blues, with Varney scoring on his debut but Cotterill admits he is still looking to recruit more players ahead of the new Championship season.
"We haven't quite got a squad yet, just a large team, and we need to do some work on that," he said.
"But the new boys have given us something different, they've given us energy, legs, goals, so we're happy with that and we just got to add a few more to that now."