The 29-year-old is looking forward to trying his hand in Super League.
“It is a different style of competition but I have watched it on TV and the chance to go over there and play in Super League is something that excites me,” he said.
“I am pretty close with Pat Richards and he obviously off to Catalans next season.
“When people like that tell you how good it is you take those comments on board.
“One of the reasons I was sold on the Rhinos was the chance to be part of a team that is competing for silverware.
I have never tasted success at senior level and hopefully I can achieve that at Leeds.
I know the team are going really well and I am looking forward to watching the boys for the remainder of the season so I can familiarize myself with everyone’s names and get to know how the team plays before I get over here.
“I have always had a desire to come and play in the UK in my career and I have had the opportunity to stay in Leeds on a number of occasions when I have been over.
“It is a great city and I am looking forward to making it my home and being part of the English lifestyle.”
Leeds Rhinos head coach Brian McDermott is delighted to have added a player of such experience and quality to his ranks.
“It is very pleasing to have reached agreement with Keith to bring him to the Rhinos,” he said.
“He is a no-nonsense front rower who will take the team forward. Importantly, when you speak to anyone about him as a person, they can not speak highly enough of him.