Roelof began his racing career in a Simca in 1970, before progressing to Formula Ford and winning the Dutch championship in 1972. With the benefit of strong sponsorship from HB alarm systems, Wunderink rushed through Formula 3 and F5000 during the next two seasons, and found himself in a works-backed Ensign for 1975 without showing anything like the form to justify such a chance. Nevertheless, he bravely got on with the job, hampered at first by having to make do with the 74 car and then being sidelined with a broken cheekbone and concussion after a testing accident in an F5000 car. At the end of the season, having tried but failed, the quiet Dutchman stepped out of the racing limelight.
(c) 'Who is Who' by Steve Small, 2000