The Auckland-born ace is also promising Cas fans he will do his utmost to make their admission fee worth every penny.
"My coach at Melbourne Storm, Craig Bellamy, speaks highly of Terry (Matterson) and I've heard a lot of good things, so I'm pretty excited
about working with him at Castleford," said Isa.
"I can guarantee that I will do my best for the players and fans at the club.
"The fans play a lot of money to come to games and I will be out there doing my best for them every game.
"I'm not going there to take it easy, I've signed a one- year deal and it's a chance to impress. More importantly I want to play well for Castleford and do all I can to achieve success there.
"I've been doing pre season with Melbourne and I'll keep that up until I leave for Castleford.
"I'm fit and ready to go and I can't wait to get started!"
I hope he keeps to his word!
