Tommy Lee called for his side to rally together ahead to Saturday's massive game at home to Bury, calling the match "the biggest game of our careers."
With the side four points above the drop zone, the Spireites 'keeper knows that a win against the Shakers on True Blue Day at the Proact will confirm the club's participation in League One for the 2016/17 season.
With just a point from their last three games, Chesterfield could have been declared safe already, but Lee says this week the Spireites will be doing all they can to make sure survival is secured at the weekend: "The beauty of football is that however bad we've played we've quickly got a chance to put that right, and we've got to do that.
"We'll be stressing to everyone all week how important it is because I've been relegated at this club before and it's not nice. It's on your CV for the rest of your career and that's for everyone. For the starting 11 it's not nice, but even for the lads not involved relegation's not nice.
"We'll be positive, as we always are. The gaffer and Morgs (Chris Morgan) will get us up for it. It's a game we think we can win and we've got nothing to lose now. There's no point trying to cling on for a draw, with a good crowd at the Proact we've got to do everything we can to win the game.
"That's all you can ask, if we leave it all out there and get it right we'll be fine I'm sure."
With a long season now boiling down to just 180 minutes of football, Lee says his team have discussed the importance of Saturday's fixture.
"We had a discussion after Swindon," he explained. "We've got to make sure that every one of us is as close to 100% as possible on Saturday because it's the biggest game of our careers.
"We're in the situation we're in not because of Swindon or because of Sheffield United but because of the 40-odd games we've played up to now. We've got a chance to put that right, win the game and then it's done and dusted."