The Republic of Ireland assistant manager is wanted by the owner of the Championship club who may approach the Football Association of Ireland
The Championship club are seeking a new boss after the sacking of Dave Jones and Mandaric believes that Keane has "a superb personality" that would make him suitable for the role.
However, he admitted that it would be "difficult" to convince the former Sunderland and Ipswich Town boss to abandon his role with the Republic of Ireland, which he took up in November.
"If I am going to do anything with Roy, I will have to call the federation [FAI] and see if I can get a chance to talk to him," Mandaric told the Sunday Times.
"You have to go through the channels for something like that. I will probably look into that. Roy took the job with Martin O'Neill so it would be difficult to move him out of there.
"I would like to look at him. He has a superb personality and won promotion with Sunderland."