The 21-year-old, who joined the club from Livingston as a striker, has impressed in the absence of the injured George Friend and Mowbray believes he could have a future at the back.
He told the Northern Echo: "I wasn't sure if Andy was going anywhere as a high-rise player, an attacking player.
"Yet every day in training I would see him make challenges, being very disciplined about stopping the opposition. I felt he could play left-back for us.
"He is decent with the ball and I have no fears about playing him there, he has looked good.
"I have had to wait to give him a chance there, but I think it has worked reasonably well for us. As well as showing an awareness defensively, he does join in with the attacks, which is good."