The 28 year-old has made 147 appearances for the Robins since joining them in 2004 and was part of the squad that won promotion to Super League.
He said “It’s taken a few months to sort out but I’m over the moon it has all been done and that I’ll be here for another two years,” said Netherton.
“I think the club’s going forward and I’m looking forward to being part of it.
“We’ve been making some steady progress over the years and now we’re looking to kick on and the next logical step for us is to win some play-off games and win some trophies.”
Coach Justin Morgan commented that Netherton is an important player in the squad and deserves a new contract.
“Jason has been part of the club right the way through our progress in Super League and has played an important part in helping us get to where we are today.
“We want him to help us continue that progress and make the next step which is to be competing in and winning play-off games and finals.”
Netherton follows Josh Hodgson in signing a contract extension, with the hooker also recently penning a new deal.
The Robins face derby rivals Hull FC on Sunday at Craven Park and whilst tickets are still available, there are limited.