Alan Mullery has left Conference strugglers Crawley.
The former Albion manager says his help as an advisor is no longer needed at the Broadfield Stadium.
Mullery was given a part-time position last September to help owners, the SA Group, improve the running of the club following its switch to full-time football.
He was instrumental in appointing John Hollins as boss following the sacking of Francis Vines and his backroom staff.
Mullery said: "I agreed to help them up until Christmas and I was there three mornings a week. I gave them advice on a lot of things around the club and they have taken most of it.
"My brief when I came in was to help the club become more professional and I think I have done that because a lot of things have improved.
"Various players and staff have left and the club is professionally run much better. However, they now have a manager with a lot of experience and the chairman is running things so I am leaving them to it.
"If they want to ask me anything they can ring me up at any time but otherwise I'll let them get on with it."
Meanwhile, supporters' club chairman Kevin Giles has warned Hollins the backlash from fans will continue unless results improve quickly.
Hollins suffered a barrage of abuse from the crowd at the end of Saturday's embarrassing FA Trophy exit against Boreham Wood.
The defeat followed a run of one league win in eight games since Hollins took charge, which has seen Crawley drop to second bottom in the Conference.
Giles said: "I don't think he can have too many complaints about the fans getting on his back after Saturday.
"It was an embarrassment. We should have been good enough to beat Boreham Wood, they were a bunch of cloggers.
"The fans pay their money every week so we have the right to voice our feelings when we see things going badly wrong.
"It will only carry on and probably get worse. Unless things change, it is going to become torturous for the rest of the season.
"I'm seriously worried about what is happening because I don't see where our next win is going to come from.
"A lot of fans I have talked to say they are already resigned to going down, which is a horrible situation to be in."
Giles fears attendances will continue to drop if the poor run of results continues.
Reds averaged gates of just over 2,000 last season but that has gone down to 1,600 and only 929 turned up on Saturday, which included 300 Boreham supporters.
Giles added: "Once it starts dropping below 1,500 then the club is going to lose some serious money. But I don't see it improving because of how we are playing at the moment. We should be getting 2,000 fans every week but we will only get that if the team is winning."
Hastings United are hoping to sign defender Danny Williams in time for tonight's tough away game at Met Police.
Joint-manager Nigel Kane was confident United would have the Eastbourne Borough centre-half with them for the Ryman League division one trip to Imber Court.
Williams has made nine appearances for Borough's first team this season and Kane is keen to get him onboard as injuries and suspensions bite into the United squad.
Shaun Loft is back following a one-game ban but Danny Spice serves the second of a three-match suspension tonight.
New signings Matt Piper and Sam Thompson, who made their debuts on Saturday in the 2-0 loss to Bashley, retain their places in the squad.
Defeats to Banstead and Bashley have dented Hastings' play-off hopes but Kane hopes they can pull off a surprise.
He said: "We have nothing to lose.
After the past two performances, expectations will not be high but we are capable of surprising a few people."
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules hereComments are closed on this article