Callum is a right-handed batter and wicket-keeper who made his first-class debut for the Firebirds against Canterbury on the Basin Reserve in November 2021. He made his Ford Trophy debut against the Central Stags at Napier in December 2022 and played his first T20 game against the Otago Volts on the Basin Reserve in the same month. He played for New Zealand at the Under-19 World Cup tournament held around the country in early 2018 and played two games for a New Zealand XI against Sri Lanka at Lincoln in 2024/25.