Gregory, 25, has been on trial with the club since October, and has now impressed coach Phil Carleton enough to earn a playing contract.
“I’m really happy to have been given a contract,” said the player.
“I’ve learned a lot from the coaches during the first part of pre-season and now hope to continue learning and improving. I’m looking forward to helping the Scorpions have a great season.”
Coach Carleton is delighted to have added the player to his ranks for the new season.
“We have several boys on trial with us during pre-season,” he said.
“They are all working hard and showing great signs of improvement. Whilst others may be rewarded with a contract, Scott is the first.
“He hasn’t missed a session since November, has worked incredibly hard up to Christmas and it was just a matter of seeing him maintain momentum with his fitness test before I offered him a contract.
“Working with Scott, I know he’d be the first to say he still has lots to learn, but when his attitude and approach to his rugby league is like it is, he will have no problems in achieving his goals.
“The way in which he has bought into the clubs new ethos has certainly helped him settle. The pats on backs he received from the boys on hearing he’d signed is testament to Scott’s character.
“I’m looking forward to seeing Scott play now in the friendlies come February and potentially pushing for a starting spot this season.”