[1] A broken leg in his last year at school meant he missed a chance at selection for the 2016 Australian Schoolboys team,[6] but he was called up to play for the Melbourne Rising in the National Rugby Championship (NRC) later that season.

[6] While still at school, Valetini signed an Extended Playing Squad contract with the Brumbies for the 2017 season.

[3] In 2017, Valetini signed a two-year full-time Super Rugby contract with the Brumbies until 2019,[8] before playing NRC for the Canberra Vikings in 2017.

[3] Valetini made his international debut for Australia at Bankwest Stadium in Sydney against Samoa in September 2019.

[9] Valetini was heavily involved with the Wallabies in 2020 and 2021, appearing against New Zealand, South Africa and Argentina.