Ian Evatt has brought a former Spireite back to the club to work with the goalkeepers until the end of the season.
Tommy Lee, who was forced to retire through injury earlier this season, is currently working towards his coaching badges and involved with the Sheffield United academy.
He will join caretaker boss Evatt and youth team coach Miguel Llera in working with the Town first team.
Their first league fixture in charge is on Saturday when Wycombe Wanderers visit the Proact.
Last night Evatt and Llera oversaw a young Spireites team in the Derbyshire Senior Cup final, in which they beat Alfreton 1-0.