The 26-year-old, who has played rugby league for Salford, will join from Rotherham in the summer.
Prop Mark Tampin and back row forward Max Argyle will also leave the Yorkshire side for Jersey.
George Eastwell has signed from Loughborough Students while Jake Armstrong will arrive from Doncaster.
Jersey are fifth and could still make the Championship play-offs, but will not go up to the Premiership if they are successful as they do not have a suitable ground.
Head coach Harvey Biljon had previously said he was three players away from finalising his squad for next season.

Farah added the 5,000m to his 10,000m title at the World Championships - a feat he also achieved at the London Olympics in 2012 and the 2013 Worlds.
Foster said: "Mo is the greatest sportsman that Britain has ever had."
Farah, 32, responded: "We have had so many legends and to be in the same category as them is amazing."
Farah has now gone ahead of Ethiopian Kenenisa Bekele who is the only other person to claim an Olympic and world 'double-double' in the distance events.
Farah now has five World Championship golds, two Olympic golds and five European golds, and is unbeaten on the track outdoors in a major championships since finishing second in the 10,000m at the 2011 World Championships in Daegu.
Foster, working as a BBC commentator at the championships, explained why he put the British runner on such a pedestal.
"He's Great Britain's most prolific winner of global golds and he's put former British athletes like Sebastian Coe and Daley Thompson behind him," he told BBC Radio 5 live.
"Former rower Sir Steve Redgrave [who won five Olympic golds] was part of a team. Mo is on his own and it's lonely out there. He's ruthless and we've not seen that. We should be enjoying the moment. We'll never see his like again."
Farah named Redgrave, ex-footballer David Beckham and former Manchester United manager Sir Alex Ferguson as his three greatest British sportsmen.
"We have had so many legends and to be in the same category as them is amazing," he said.
Multiple Olympic and world sprint champion Usain Bolt - who has won gold in the 100m and 200m in Beijing, as well as anchoring Jamaica to the 4x100m relay title - is a friend of Farah and added his praise.
"When it comes to Mo I'm never worried," the 29-year-old told BBC Radio 5 live. "When you are used to winning and dominating it comes easy.
"He knows what it takes to win and I had no doubt Mo would win."
Jersey have signed five players in preparation for next season in the Championship, including former Sale Sharks centre Jordan Davies.
[NEXT_CONCEPT]
Olympic medallist Brendan Foster has described Mo Farah as Britain's "greatest sportsman" after claiming the first distance 'triple-double'.