Career
His best Bobsleigh World Cup finish was third in the two-man event at Saint Moritz in January 2010. Van Calker"s best finish at the FIBT World Championships was 14th in the two-man event at Saint Moritz in 2007. At the 2010 Winter Olympics in Vancouver, van Calker finished 14th in the two-man event while withdrawing from the four-man event over safety concerns at the Whistler Sliding Centre.
Prior to his bobsledding career, he competed in sprinting and hurdling events: at the 1995 European Youth Olympic Days he was fourth in the 110 metres hurdles and a bronze medallist in the 4×100 metres relay.