• U.D.R. Champion 1991
• Winner of the Wallonia Cup 1992 with Epos
• Winner of the Cup of Flanders 1993 with Elord
• Champion of 'Brabant Wallon':

• 1993 with Ecusson de l'Officier

• 1994 with Largo
• 1995 with Kurillos
• 1999 with Quattro of het Voortsveld
• 2000 with Rossini

• Interregional Champion of Belgium:

• 1994 with Largo
• 1995 with Kurillos

• 2° in the Belgium Championship (Grand Prix) 1996 with Kurillos

• 2° in the Six-year old Horses Belgian Championship 1999 with Quatro of het Voortsveld
• 2° in the Six-year old Horses BWP Championship 2000 with Rossini
• Winner of different qualifications in the Cup of Belgium for Young Dressage Horses (with a.o. Weldec, Mexx, Rossini, Quattro van het Voortsveld)
• 2° in the Final of the Cup of Belgium for Young Dressage Horses 1998 met Rossini (4-year)
• 2° in the Final of the Cup of Belgium for Young Dressage Horses 1999 met Quattro van het Voortsveld (Six-year old)

Several St Georges victories with:

• Cupido
• Ecusson de l'Officier
• Elord
• Epos
• Kurillos
• Largo
• Rossini

Several Grand Prix Victories with:

• Epos
• Kiwi
• Kurillos

These horses achieved at least once 63% in Grand Prix.

Altogether, more than 200 victories, all with self-trained horses.

Koen was selected several times for the Young Horses World Dressage Championship.