Kebe won the hearts of supporters in 2012 after committing his future to the club and then helping them lift the Championship trophy.
"Jimmy is the ultimate team man," revealed McDermott.
"When he first came to the club, the perception of him wouldn't have been that.
"But he is a student of the game and a winner. He epitomises what the team is about.
"We are the ultimate team and it has to be that team concept that makes the difference."