Sander Marthinussen is a 27-year-old professional football player from NOR. He currently plays for Mjondalen IF, wearing the number 8 shirt. He plays primarily as a Defender. He stands at 187cm tall and weighs 78kg.

His most recent move was a from Lysekloster to Mjondalen IF on 2026-02-02.

Throughout the Norwegian 2.Divisjon 2025, Sander Marthinussen featured in 24 matches, averaging 0 tackles, 0 interceptions, and 0 clearances per game, while blocking 0 shots per game.