He takes the place of recently retired prop Jack Howieson.
Coach Steve McCormack said: “It’s fantastic to have Luke join us. He’s currently playing regularly in the NRL despite dealing with the loss of his mother recently, and that shows his strength of character. You don’t get to play every round of the NRL for about six years, as Luke has done, unless you’re a fantastic player and a fantastic professional.”
McCormack also expressed his delight at seeing three of his players help Huddersfield to the top of Super League.
McCormack added: “It’s fantastic for Scotland to see these three play so well all season. They’re all in great form and looking strong. I can’t wait to start working with them with the Scotland squad.”