D.A.D.A.... D.A

Why didn't Harry take the job of D.A.D.A after the end, i know that though the books he wanted to be an aouror, but after the war and the rebuilding of Hogwarts shouldn't he have been D.A.D.A professor we know he is good at it he tought the D.A( Dumbledore army) and was very good at it...