Former Derby County, Hull City and Preston boss Phil Brown has been switched to a director of football role by non-league Peterborough Sports.
Brown was appointed as manager by the National League North club in September but they have not won any of their last seven games and are in the relegation places.
His last game in charge was a 3-0 defeat by his home-town club South Shields on Saturday.
Forward Michael Gash, who was in joint charge of The Turbines with Luke Steele prior to Brown's arrival at Pims Park, will lead the team for the rest of the season.
"I would like to personally thank Phil for his commitment and contribution in his time as manager in this extremely hard season," said chairman Tim Woodward.
"We find ourselves in a precarious position with 11 games to go; I know I can rely on everyone's full support for Gashy and the whole team in what will be 11 cup finals to maintain our position in the National League North."
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Previously an assistant to Sam Allardyce for six years, Brown's managerial career began at Derby and his list of former clubs also includes Southend United, Swindon Town, Barrow and Kidderminster Harriers.
He guided Hull to promotion to the Premier League in 2008 and won the League Two play-off final in 2015 with Southend.
The 66-year-old former full-back also had a 13-month spell in Indian football with Hyderabad, which came to an end in January 2020.
Brown has managed in the top five divisions of English football but told BBC Look East in November that taking a job in the sixth tier was an adjustment.
"Everybody remembers the highest level [with Hull], but if I did something here with Peterborough Sports, there's no doubt in my mind it would be a great achievement," he said.
"If I can keep Peterborough Sports in this division, first and foremost... if we survive this year, which is our first goal, then it's all about next year and can we get promoted? Can we move this club on?"