New manager Dean Saunders has further strengthened his backroom team by appointing Brian Carey as his assistant.
Carey has joined the Spireites from Blackburn Rovers, where he worked as the professional development phase coach in the academy. He previously acted as Saunders' deputy at Wrexham, Doncaster Rovers and Wolverhampton Wanderers.
Commenting on his appointment, Carey said: "I'm delighted to be here and I'm really looking forward to the challenge. Dean can ask me for an opinion and I'll give it. He's bubbly and enthusiastic and we have a good working relationship.
"I can see the progress that has been made here and it's a great opportunity. The team did well last season and there are some solid foundations for us to build on."
Carey, who hails from Ireland, started his career as a defender at Manchester United and later played for Leicester City and Wrexham. He featured for Wrexham when they were beaten by Chesterfield in an FA Cup quarter-final in 1997.
Carey joins Mark Crossley, who returned to the Proact Stadium recently as goalkeeper coach.