Mark Crossley has rejoined the Spireites as goalkeeping coach on a part-time basis.
Crossley has had two previous spells as a coach at the club and also played for Chesterfield at the end of his playing career. He returns to the Proact after serving as assistant manager at Notts County.
Commenting on the appointment, manager John Sheridan said: "Mark is a top goalkeeping coach who will be an excellent addition to the backroom staff. I'm delighted he has agreed to join us."
Crossley said: "It is great to be back at Chesterfield and I'm really looking forward to working with John again and his assistant, Glynn Snodin. It promises to be an exciting season and I can't wait to get started."
Crossley made over 500 appearances after starting his career at Nottingham Forest and was also capped eight times by Wales.
He is Chesterfield's oldest debutant, having turned out at the age of 40 years and 53 days in an away game against Torquay United in August 2009. He made three further appearances before hanging up his gloves at the end of that season.