Naufahu is perhaps best known for being an original cast member of the New Zealand soap opera Shortland Street, playing paramedic Sam Aleni for the show's first four years.
In 2006, at the Air New Zealand Screen Awards, he won Best Performance by an Actor in a Supporting Role as Erasmus, in the Toa Fraser film No.
On 1 September 2017, Naufahu pleaded guilty in Auckland's District Court to six charges of indecent assault.
The charges related to six women who attended private acting lessons conducted by Naufahu in Auckland between 2011 and 2013.
Naufahu had an earlier conviction for common assault and wilful damage arising from an altercation in a Christchurch bar in 2001, for which he was fined by the court.