Sander Erik Kartum (born 3 October 1995) is a Norwegian professional footballer who plays as a midfielder for Wellington Phoenix, on loan from side Heart of Midlothian. Kartum has previously played for Stjørdals-Blink, Kristiansund and Brann.
He started his youth career in LÃÂ¥nke, switching to Stjørdals-Blink in 2012. He made his senior debut in the summer of 2012, and took part in the team's rise from the 3. divisjon to the 1. divisjon. Ahead of the 2021 season he was bought by Kristiansund. He made his Eliteserien debut in May 2021 against Molde and scored his first goal later that month.
Kartum was given the Player of the Year award in the 2020 1. divisjon by the Norwegian News Agency.
On 24 January 2025, Kartum signed for Scottish Premiership club Heart of Midlothian on a two-and-a-half year deal for an undisclosed fee.
On 16 January 2026, the of the A-League Men signed Kartum on loan from Heart of Midlothian until the end of the 2025âÂÂ26 season. On 23 January, Kartum made his Phoenix debut and scored a few minutes after being substituted in. The Phoenix would go on to lose 4âÂÂ1 away to the .