He is on the books of Aalesund FK and wears shirt number 21. His main role on the pitch is Midfield. He measures 186cm in height and weighs 79kg. His estimated market valuation currently stands at 400K €.

His latest transfer saw him join Aalesund FK from Helsingor via Free on 2025-07-12.

Over 2 appearances in the Norwegian Eliteserien 2025, Mathias Christensen contributed 2 goals and 0 assists, completed 4 key passes from 68 total passes, and posted a passing accuracy of 23.5.