Costigan quits CQ NRL Bid team
The Fox Sports rugby league commentator dropped the bombshell to The Morning Bulletin late on Friday.
Costigan was a key figure with the bid team in his role as project co-ordinator.
He has cited family reasons for his departure.
It is understood Costigan will relocate closer to his home town of Mackay.
The shock news comes during the week that former North Queensland Cowboys boss Denis Keeffe arrived to take up his post as inaugural chief executive of the CQ NRL Bid team.
On Wednesday Keeffe said having an NRL club in the region would be worth $75 million to the local economy.
Costigan's departure is a huge blow given the experience and contacts he has in the NRL.
He formerly held positions with the Canterbury Bulldogs and also the Bradford Bulls in the English Super League.
Costigan is the mainstay in the commentary box during all New Zealand Warriors home games which are broadcast in Australia via Fox Sports.
He was lured to the CQ NRL Bid team by its chairman Geoff Murphy in what appeared to be a wise move by the JM Kelly boss.