The 23-year old Australian who can play as both middle and back row will make the move from the NRL to play in Super League for the 2018 season.
Head Coach Chris Chester said, “Pauli is a great addition to what already is a strong looking pack, bring some real quality to our go forward and bring an x-factor to our attacking play. He is a big strong powerful athlete with a good offloading game.
“I have had nothing but good reports from people in Australia about Pauli both on and off the field.
“I am really looking forward to working with him over the next few years and I am pretty sure he will become a fans favourite.”