Chesterfield Football Club have announced that John Pemberton has left the club by mutual consent.
In an interview on the club website, Chairman Mike Goodwin said that "it was agreed a change in manager would be in the best interests of the club.
"Unfortunately results have not gone as we all expected this season, leading to a change in manager being required.
The Chairman wanted to put on record his thanks to John, for his "hard work, honesty and integrity'.
Mr Goodwin added that the search for a new manager is now underway.