Born in Whanganui, Brett Cameron worked his way through the age grades there before relocating to Christchurch to join the Crusaders Academy. He was part of the Canterbury squad that won the Jock Hobbs Memorial National Under 19 tournament in 2015 and joined the Canterbury wider training group in 2016. Cameron also represented the Crusaders Development XV during their 2016, 2017 and 2018 seasons.
A member of the Lincoln University club, the flyhalf’s first start in a Mitre 10 Cup match was against Hawke’s Bay during round three of the 2017 season. He made a bold statement in Napier, scoring the first try of the match after just 10 minutes and kicking six conversions and two penalties for a 23-point haul.
In just his second season of provincial rugby, Cameron was named in the All Blacks wider squad to join the team in Japan for their end of year tour in 2018, and was named in the Crusaders squad for 2019 just a few weeks' later.