Hart took charge of Leeds’ academy in September, as the Whites looked to find an adequate replacement for Neil Redfearn.
And Coyle believes that Hart has been a great appointment, because of his outstanding knowledge of the game.
“He’s a very good man to have around the building – on and off the pitch,” Coyle said.
“He’s a very knowledgeable guy and as soon as he has come in he has pointed us all in the right direction and given us that extra boost that we needed.
“He’s been a very good person to have around the building.”
Hart has been tasked with guiding Leeds’ youngsters into the first team, and ensuring that they continue to develop.
The former Portsmouth manager has inherited a very talented group, and he will hope that his experience can help all the prospects flourish.
Leeds have benefited from the productivity of their youth academy in recent times, with the likes of Charlie Taylor, Alex Mowatt and Lewis Cook all developing into key players in their senior squad.
Coyle is expected to follow in their footsteps in the coming years, with the youngster well regarded by Leeds.
So far the right-back has not made an appearance for the Whites’ senior side, but after penning a new contract – he will hope that his maiden opportunity could come soon.