Edinburgh council lacks a "safe and supportive" culture to deal with whistleblowers, according to an independent review.
A 150-page report by Susanne Tanner QC contains 50 recommendations for improvement.
City of Edinburgh Council leader Adam McVey said his grateful for the "strong and thorough" recommendations.
A separate report recently found an "old boys network" protected a social worker who was a serial abuser.
Ms Tanner considered ten questions in her report, the first of which related to the whistleblowing culture.
She said: "My overall conclusion is that despite considerable steps taken to improve organisational culture since 2014, there is not a universally positive, open, safe and supportive whistleblowing and organisational culture for the raising of and responding to concerns of wrongdoing"
Ms Tanner said that while the council was moving in the right direction "there is a need to demonstrate transformational changes".
She added that her recommendations should assist with that.
The report, which will be discussed by councillors on Thursday, rejects a suggestion that the council ignores concerns about wrongdoing to protect its reputation.
Council chief executive Andrew Kerr thanked those who took part in the review, which was commissioned in October last year.
He said: "I know that, for some, this will have been extremely challenging, based on what they have been through, and I want to pay tribute...
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