 At the 1992 Summer Olympics in Barcelona, he was eliminated in the repechages of both the K-2 500 m and the K-2 1000 m event.Nijkamp studied ecology and engages in public policy consulting.Nijkamp participated in the World Cup Canoe of 1985 at Hazewinkel in Heindonk, Belgium, of 1990 in Duisburg, Germany, and of 1991 in Paris.