Nicholas Randall says Nottingham Forest are a club in intensive care
In an open letter on the Nottingham Forest website, Randall said there was much to be done to turn the Championship club around but promised stability and realistic targets.
Forest finished just outside the relegation zone this season, avoiding the drop to the third tier on the final match day.
And Randall admits there is much to be done in order to move Forest forward.
"We know that the necessary infrastructure is not in place to take the club forward," he wrote.
Evangelos Marinakis bought Nottingham Forest to end Fawaz Al Hasawi's disastrous reign
"I do not want to dwell on the past but it is clear to any outsider that the club has not been run as it should have been.
"To use the medical analogy the club is in intensive care. It is our job to ensure that we nurse the club back to health."
Randall has expressed full confidence in Forest's new Greek owner Evangelos Marinakis
Forest, who won the European Cup in 1979 and 1980, were owned for the last five years by Kuwaiti Fawaz Al Hasawi who went through eight different managers since 2012.
Mark Warburton guided Nottingham Forest to Championship safety Final Championship table 2016/17 Sun, May 7, 2017
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1. Newcastle – 94 points (GD +45)
Mark Warburton took over in March to guide Forest to safety.
"We are fundamentally committed to ensuring the club enjoys a period of stability," Randall added.
"We want to assure the supporters we are here for the long term.
"Mark will be given the precious commodity of time to turn matters around and to build something special at the club again."