Mr Mander said the independent recruitment process had initially chosen former Commonwealth Bank executive Leon Allen for the role but ended up being awarded to Frankie Carroll,who has since moved on to another department.
"This type of behaviour can not be tolerated,"he said.
In a statement,Ms Trad dismissed the referral as"political point scoring"by the opposition.
Asked to release the original selection panel report on Wednesday,Premier Annastacia Palaszczuk said if the opposition had"any evidence or a whistleblower"it should refer the matter to the CCC.
In his letter to the watchdog's chair,Alan MacSporran,Mr Mander said the opposition was blocked from receiving the report under right to information last year.
A"whistle blower of considerable standing"then contacted the opposition at the start of the month with claims Ms Trad had"intervened"in the process and"insisted"Mr Carroll — who had applied but was not the preferred candidate — be appointed.
Mr Mander asked the CCC to consider whether the alleged act amounted to misconduct under the Criminal Code.