NZNBL and Australian state leagues Smith-Milner debuted in the
New Zealand NBL in
2012 with the championship-winning
Auckland Pirates, playing five games. He joined the
Super City Rangers in
2013 but did not play, going on to play 10 games for the Rangers in
2014 and averaging 12.7 points per game. After a season in the United States playing
college basketball for
Polk State College in 2014–15, Smith-Milner re-joined the Rangers for the
2015 season. He played for the
Auckland Huskies in 2020, the
Wellington Saints in 2021, and the Sandringham Sabres in 2022. Smith-Milner joined the Wellington Saints in 2023. He re-joined the Saints in 2024. Smith-Milner joined the Canterbury Rams for the
2025 season, returning for the franchise for the first time since 2017. Smith-Milner joined the Nelson Giants for the
2026 season, returning for the franchise for the first time since 2018.
Australian NBL In 2015, Smith-Milner joined
Melbourne United of the
Australian NBL. He spent three seasons as a development player before signing a full-time contract in 2018. He spent two seasons with United as a fully contracted player. On 13 August 2021, Smith-Milner signed a two-year deal with the
South East Melbourne Phoenix, with the second year being a Club Option. On 26 August 2023, Smith-Milner signed with the
Adelaide 36ers for the
2023–24 NBL season. On 19 April 2024, Smith-Milner signed a two-year deal with the
Brisbane Bullets. In November 2024, he played his 150th NBL game. On 21 February 2025, the Bullets exercised the club option in his contract for the 2025–26 season. ==National team career==