During his playing career, Hoffman played for London Scottish F.C. in the English Premiership for the season of 1992/93, before getting an invite to move to Portugal to play a season at Técnico.
He was part of the team that won the Portuguese Championship and the Cup of Portugal in 1993/94 before moving to England to play for Worcester Warriors.
After an injury-stricken season at Worcester, he became a Portuguese naturalized citizen and decided to represent Portugal, winning 27 caps.
He started to coach at a young level while still playing, being Técnico U-18 head coach, before starting an international referee career at a youth level in 2002, and at the senior level in 2006.
In December 2012 he was named as part of the 18-man referee team for Super Rugby 2013, debuting on 1 March 2013 when the Waratahs played the Melbourne Rebels.
