provides a range of fire and rescue services to a Northern Ireland population of 1.
Dr McKee was first appointed to NIFRS
on 1 January 2011.
spokeswoman added steps have been taken to address the issue, including the development of a revised policy.
has reiterated its message about the importance of smoke alarms in the wake of the latest tragedy.
has estimated that 800 sows and 3,500 piglets died in what it described as an "intense" blaze.
was established on 1 July 2006 through the Fire and Rescue Services (Northern Ireland) Order 2006 and provides a range of fire and rescue services to a Northern Ireland population of 1.
Chris Kerr, chief fire officer with the Northern Ireland Fire and Rescue Service, said: "Today is an extremely sad day for NIFRS
and our wider Fire Service family as we mourn the untimely death of our colleague Nial Hamilton who died while on operational duty last night.
Whistleblowing procedures were in place in NIFRS
but they did not work well.
It is clear that the culture and working practices within the NIFRS
headquarters did not encourage openness, transparency and trust.
spokeswoman said: "Preliminary findings indicate the fire started accidentally in a small room on the roof of the tower block, adjacent to the water tanks.
said in a statement: "We would appeal to all members of the community to assist our firefighters in their efforts to protect our community.
A spokesman for the NIFRS
said: "The NIFRS
rescued a bullock after it fell a considerable distance into a ravine at the weekend.