[3] In 2006, Vinnerborg officiated at the 2006 World Junior Ice Hockey Championships in Vancouver, British Columbia, Canada, where he was selected as the referee for the bronze medal game between Finland and USA.

[15][16] They stood for a controversial but correct puck out penalty on Canada's Rick Nash in overtime, which led to Ilya Kovalchuk scoring the championship winning goal on the man advantage that followed.

[17] Vinnerborg suffered an injury to his neck and head after a collision with HV71's Mattias Tedenby during a pre-season game in 2008,[18][19] which led to him missing the start of the 2008–09 season.

[20] On 30 September 2008, during a game between hosts SC Bern and the New York Rangers,[21] Vinnerborg and Don Koharski became the first tandem of National Hockey League (NHL) and IIHF referees in an international event.

"His knowledge of the North American game and his work ethic and professionalism will make him a positive addition to the NHL staff," said league director of officials Terry Gregson.