Havili began his rugby career in his home country of Tonga, before eventually moving to Wales to play for Bridgend.
[1] Upon the advent of regional rugby in Wales in 2003, he joined the Celtic Warriors, whom he played for until they were disbanded in 2004.
He was picked up by the Llanelli Scarlets soon afterwards and became the top try scorer in his first season in West Wales However, in 2005, Worcester showed an interest in Havili and he was released from his contract after just one year with the Scarlets so that he could sign for the West Midlands club.
After not making a single appearance in the 2007–08 season, it was announced in May 2008 that Havili would be leaving Worcester Warriors to sign for National Division One side Cornish Pirates.
Havili has had an erratic international career, having earned only nine caps for the Tonga national team.