Van Dongen was born in Rotterdam. He was the first non-Japanese competitor to ride a Yamaha in a World Championship Grand Prix race, when he rode a Yamaha RA41 to a 13th place finish at the 1961 125cc Dutch TT.[2] His best season was in 1969 when he won the 125cc Spanish Grand Prix and finished the season in third place behind Dave Simmonds and Dieter Braun.[1] Van Dongen was a 14-time Dutch National Champion in classes ranging from 50 cc to 500 cc.[2]