Vaimauga was first signed by the New Zealand Warriors in 2019 as a 15-year-old from the Otahuhu Leopards. In 2023, after impressive performances in the lower grades, and in the Warriors opening trial fixture, Vaimauga was upgraded to a top 30 contract and re-signed until the end of 2025.[5][6]
Vaimauga made his first grade debut in his side's 14−0 loss to the Sydney Roosters at Mount Smart Stadium in round 9 of the 2023 NRL season.[7] In his second match against the Penrith Panthers, Vaimauga was sent to the sin bin by referee Todd Smith for apparently striking Penrith's Nathan Cleary.[8] Vaimauga was not charged by the NRL match review over the incident.[9][10]
On 10 December 2024, the Warriors announced that Vaimauga had re-signed with the club until the end of 2028.[11]
^Kdouh, Fatima (19 October 2022). "Ensure guns are kept safe". The Daily Telegraph. Sydney, New South Wales: Nationwide News Pty Ltd. p. 70. Demitric Sifakula (Warriors) A De La Salle College product, Sifakula is a ball playing lock that also provides some utility value in the forward pack.
^Long, David (7 May 2023). "Warriors boss close to bagging officials". Sunday News. Auckland, New Zealand: Stuff Limited. p. 16.
^Bruce, Jasper (7 May 2023). "Nathan Cleary shrugs off dust-up with Warriors". Sydney, New South Wales: Australian Associated Press Pty Limited. AAP Sports News Wire.
^"Warriors sponsor pans refs". The Timaru Herald. Timaru, New Zealand: Stuff Limited. 8 May 2023. p. 24.