His loyalty has been rewarded this season, with Leeds currently flying high in the Championship table as they target a return to the top flight.
Bates told Sky Sports News: "Simon is in it for the long run.
"He was approached and offered a job on a much bigger salary, in the Premiership, over a year ago and he said, 'I came to Leeds to do a job and I'm going to finish it'. If he manages in the Premiership he wants it to be with Leeds.
"We have got a good relationship. He rings me when we lose, which I know some managers don't. If he has a problem we talk about it, which is the only way to do things. We have total trust in each other.
"He is a Leeds apprentice who has come home. He has done the rounds and come home."