Tuivasa-Sheck requested an early release from the Warriors to switch to rugby late in 2021 but chief executive officer Cameron George kept the door open for him to come back.
"When he went to rugby union he did so knowing he was always welcome back here if he wished to return to rugby league. We couldn't be more delighted it's happening.
"He's popular with the players and a real fan favourite. It's going to be so good seeing him back in our jersey."
