Crawley Town assistant boss Murray Jones has left the Conference club by mutual consent.
Jones' exit is the latest in a stream of departures since the arrival of new owners the SA group.
He had only been promoted into the post just over a month ago following Dave Swindlehurst's dismissal in September.
Manager Francis Vines was sacked on Monday meaning injured midfielder Simon Wormull will take charge for Saturday's Conference game at Cambridge City.
The Reds are currently two places off the bottom of the table and went out of the FA Cup to Ryman League Braintree Town.