Stevenage boss Graham Westley has resigned from his role, bringing to end his fourth spell in charge of the club.
Westley, 51, was re-appointed in December but couldn't inspire an upturn in results.
He leaves Boro seven points adrift of safety at the foot of League Two and staring relegation to the National League in the face.
Saturday's 1-0 defeat to Salford City was their sixth in a row.
Former striker Alex Revell will oversee the final 12 matches of the season, while former England women's manager Mark Sampson will remain part of his coaching team.
Revell, 36, was previously in charge of Boro's under 18s team before making the step up to the first team coaching set-up.
"We are uncomfortable making yet another change as Graham has worked tirelessly for the Club since the day he arrived, setting up procedures and bringing some good quality new faces in, but with 6 straight defeats and 1 win in 13 league games, we are running out of time and we have to try something new," chairman Phil Wallace said.
"Alex knows the squad, knows the players strengths and weaknesses and we are hoping his energy, dedication and enthusiasm will rub off on the lads and bring us the wins we need to survive. It’s a reversal of the Management Team we had in place before Graham came, but Revs has done brilliantly and deserves his chance."
Revell will be Stevenage's fourth new boss of a turbulent season.
Dino Maamria was sacked in September, before Mark Sampson had a spell in caretaker charge prior to Westley's return to the club.