Career
Kristoffersen is a former football and bandy player, having represented Drafn in both sports. He collected silver and bronze medals in bandy World Cups in 1976 and 1977, in the one instance scoring the decisive goal. He currently coaches Drammen Bandy.
Kristoffersen suffered a stroke in 2002, leaving him temporarily unable to speak.
After a year he was back coaching football with Larvik and had made a 100% recovery.