He finished overall second in the 2000 World Cup. He has eight victories in Tiomila (1998, 1999, 2000, 2002, 2003, 2004, 2006, 2007), and four victories in the Jukola relay (1995, 1998, 2000, 2003). Eighteen medals in national championships, including six gold medals.
He won a gold medal in the 1999 World Orienteering Championships in Inverness with the Norwegian Relay team Sandvik received two silver medals in the 2001 World Orienteering Championships in Tampere. He received a gold medal (relay) and a silver medal in the 2001 World Games, and earned a silver medal in the 2000 European Championships.
Sandvik is a member of the club Halden Saskatchewan.
