Career
He made his World Cup debut in 1996, with a 57th and 45th place. His first top-30 placement in a distance race came in November 1997 at Beitostølen where he placed 25th. Bjonviken also competed in the World Ski Championships on one occasion, recording a 44th place at the FIS Nordic World Ski Championships 2003.
His final World Cup outing came at the Holmenkollen ski festival in March 2005, when he contested the 50 kilometres without finishing.
Later that year he was diagnosed with cancer, but beat the disease in 2007. He attended the Norwegian Police University College.
He represents the sports club Fossum IF.