Huddersfield have signed Scott Moore until the end of the season.
Moore last played for the club in 2009, the year Huddersfield lost to Warrington in the Challenge Cup final, in which he was a starting hooker.
Moore was a St Helens player until 2012 spending time on loan to Castleford in 2008 and the Giants in 2009.
Moore said he was delighted to the club which gave him a break.
He said: “I had success here last time and that is the aim for me again. The team is going well and my first challenge will be to get a slot in the side as there is so much quality here in depth.
“I am grateful for the opportunity to put some silly mistakes recently behind me and look forward to repaying the faith that Nathan and the Club have in me on and off the field.”
Huddersfield coach Nathan Brown, who coached Moore in his first year at the Giants, was delighted to welcome the hooker back to the Galpharm Stadium.
Brown said: “Scott was great for us in my first year here and it will be good to get him back into our environment.
“He has had a well documented path since and this is a great chance for him to start afresh in a new town and team. He will be very warmly welcomed by us as we know the attributes that he can bring to our team.”
Moore was suspended in February this year for an unspecified disciplinary breach.