Date of Birth: 
About Steffen Martinsen
- Steffen Martinsen (born 16 August 1988) is a Norwegian football midfielder who currently plays for Svelvik IF. He began his career in SBK Skiold, and joined FC Lyn Oslo as a youth player.
- He also attended the school Norwegian College of Elite Sport.
- He played one game in the Norwegian football cup 2005, but none in the league.
- He then joined Strømsgodset IF in 2006, where he got one Norwegian Premier League game in 2007.
- Ahead of the 2008 season he joined Svelvik IF.
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