Early years

Hubner played his junior rugby league with the North Knights Junior Rugby League in Rockhampton.^[2] He attended private Catholic school, Emmaus College, where he captained the school's First XIII at the Confraternity Carnival and was a promising rugby union player.^[3]

Central Queensland Capras

Hubner played fifty-eight games for the Central Queensland Capras in the Queensland Cup competition between March 2021 and April 2024.^[3][4]

Dolphins (NRL)

Hubner made his NRL debut with the Dolphins in the Round 6 match against the Brisbane Broncos at Lang Park on 12 April 2024 after Thomas Flegler was withdrawn from the game due to injury.^[5]

South Sydney

On 19 August 2024, Hubner signed a two-year deal to join South Sydney starting in 2025. Hubner made his club debut for South Sydney in round 1 of the 2025 NRL season against his former side the Dolphins.^[6]

On 28 July, South Sydney announced that Hubner had re-signed with the club until the end of 2028.^[7] Hubner played 20 matches for South Sydney in the 2025 NRL season which saw the club finish 14th on the table.^[8][9]