The Stirling MHR was appointed to the new role late last month and is tasked with overseeing the co-ordination of Australia�s intelligence and law enforcement departments.
The national security restructure includes former Ambassador to Iran and Indonesia, Greg Moriarty, being appointed as National Counter-Terrorism Co-ordinator.
Mr Keenan said the fact the Government was changing Australia�s national security dynamic did not indicate anything was necessarily wrong.
�The threat is unprecedented and we want to make sure that we are doing absolutely everything, that no stone is being left unturned,� he said.
�We are doing a lot of things but we need to make sure that all those things are moving in the same direction.�
Curtin University senior national security and international relations lecturer Mark Briskey said the restructure would help prevent national security information being �siloed� by individual government agencies.
�It will ensure that they are singing off the same sheet and that all the intelligence is aimed at the objectives that are identified as being most important,� he said.
�It�s a natural progression. Australia has co-ordinated well interdepartmentally but having one person sitting above the Commonwealth, intelligence and law enforcement is a good idea.�
Dr Briskey, a former federal officer based internationally, said Mr Keenan had the experience to perform well the new role.
�He�s shown himself to be a vigorous proponent of law enforcement and he is certainly someone from my perspective who will do well in this position,� he said.
Mr Keenan said it was his job to ensure anti-terrorism efforts were well co-ordinated across the Commonwealth and States.