After starting in racing through karting in his home land of Belgium in 1986, he drove in the Benelux Formula Ford Championship.

In 1992 he raced in Great Britain, with a drive in the British Formula Ford Championship, finishing fourth on points.

He replaced Gianni Morbidelli in the team, who had a poor year in 1998, alongside defending champion Rickard Rydell.

With half the manufacturers leaving the BTCC in 2000, including Volvo, Radermecker found himself with a seat in the Vauxhall Team.

Since 2004 he has driven in selected races in the FIA GT Championship, in various cars including a Nissan 350 Z, a Corvette C5R and a Mosler MT 900.