At 6ft 6in and 19 stone, the Wellington-born player will add physical depth to the Blues' pack and he can play in the second row or blindside and has played 26 times in Super Rugby for the Auckland Blues.
The 25-year-old, who had a short stint at Ulster early on in his career, said: "I am very excited to be joining Cardiff Blues. I know a lot of great players have worn the team's colours so I am extremely grateful to be offered this opportunity and I will be giving my all in order to meet the high standards set by my team-mates, the coaching staff and the supporters."
Director of rugby Phil Davies said: "He will definitely add value to the current crop of back five players for us.
"He will be with us all the time, week in week out, and we have four other second rows who are all Welsh-qualified.
"His arrival will add strength and depth to the team."