He played against the Rhinos in the 2009 World Club Challenge for Manly, before moving on to Cronulla and then St George-Illawarra, and Leeds chief executive Gary Hetherington revealed the club tried to sign him three years ago when he left the Dragons.
Cuthbertson said: “I am really pleased to be joining the Rhinos and excited about the challenge of joining a new competition in Super League.
“Leeds have been a top club for the last decade and I know I am joining a very competitive squad who have a great work ethic, that is evident from the success they have had. I have been to Leeds in the past and really enjoyed the City. My dad is from England so my family are also excited about me coming over too.”
Rhinos head coach Brian McDermott said: “Having spoken with Adam, I was impressed by how much he is looking forward to the challenge of joining the Rhinos next season.
“As an experienced NRL professional, not only will he add quality to our group but he will also help our younger players develop and realise their full potential with his knowledge from the NRL competition. Given the state of game in Australia and in particular the demand for front rowers over there, this is a massive boost for the Rhinos and big decision for Adam however he has a passion to play in our competition and for Leeds.”
Hetherington also hinted that Leeds’ recruitment may be done for 2015, with Cuthberton effectively replacing Salford-bound Ben Jones-Bishop in the 25-man squad, with the rest all contracted for next season.