The man who blew the whistle on staff emails which shocked some Hamilton city councillors wants an independent audit of the entire organisation.
Former Hamilton City Council project manager Barry Easton raised concerns about financial information being held back from councillors regarding an upgrade of the central business district.
Now he has written to mayor Julie Hardaker raising more concerns, this time about two other large council projects.
Mr Easton, who resigned in June, has called on the council to investigate the entire cost of Project Phoenix - an upgrade of IT facilities costed at $12.88 million.
He also wants an inquiry into extra costs linked to the $68.4 million Claudelands Events Centre, suggesting the council go beyond general managers and talk to unit managers.