The 33-year-old retired from playing at the end of the 2015 season, having played as the club’s captain throughout the campaign.
Now he has inked a two-year deal to transmit some of his considerable experience to the club’s current players, helping head coach James Lowes.
“Becoming part of the coaching staff has been in the pipeline for a while and I’m really looking forward to it,” Walker told the Bulls’ official website.
“The contract was sorted recently and I’m on board for two years and raring to go. It was an easy decision, without a doubt. I absolutely love the place and I’ve said before how much I love the club.
“My job is to assist Jimmy [Lowes] and pass down his message.
“I’ll work with the players on the areas where they are weakest. So when they go into the sessions with Jimmy they’ll be stronger in those places.
“I didn’t perform as well as I could do due to injuries, but I always gave 100% and that’s what I’ll be doing in my new role.”
Bulls managing director Steves Ferres added: “We’re absolutely delighted Chev’s joined as assistant coach.
“He’s got all the attributes to be a great coach. When he played, he proved to be a professional in every aspect of the game and is a role model to look up to.
“He’s also doing a course in nutrition which is advantageous to the club.”