[2] He made his first-class debut on 10 October 2019, for Tasmania in the 2019–20 Sheffield Shield season[3] and was upgraded to a full contract.
In September 2018, he was named in the Hobart Hurricanes' squad for the 2018 Abu Dhabi T20 Trophy[4] where he made his Twenty20 debut.
He was selected in a U19 Australia squad to play in an ODI series against the U19 Pakistan side in Melbourne.
Neil-Smith made his first-class debut against WA at the WACA on 10 October 2019 which ended in a draw.
In October 2021, during the 2021–22 Sheffield Shield season, Neil-Smith took his maiden five-wicket haul in first-class cricket, with 5/43 against Western Australia,[14] he also scored 60 runs and was named man of the match.