Published Thursday, 17 October 2013
The post comes with a salary of £150,000 per year.
Six candidates were shortlisted as part of a costly recruitment campaign to find the right person for the top job at the government-owned company.
The position will be re-advertised at a later date.
An NIW spokesman said: "The competition for the appointment of the CEO for NI Water is now complete, and unfortunately we are unable to make an appointment at this time."
Some at Stormont are now demanding answers.
John Dallat of the SDLP, who is on the Public Accounts Committee, said: "NIW need to identify what the failings were in their appointments process that has left them with egg on their face and no chief executive.
"NIW has a history of drifting aimlessly in the past and against a background which brought no credit on the organisation or those then at the helm.
"We need to know why thousands of pounds in advertising for a new chief executive didn't attract an individual of the calibre that is required to steer the organisation through a very difficult future when important decisions of management are needed."
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