Constant comes from an accomplished equestrian family - both his mother and father were Grand Prix riders and he has followed in their footsteps. His father Stanny competed in show jumping at the 1976, 1996 and 2004 Olympic Games, winning a bronze medal in the team event in 1976.
Constant won the Belgian School Championship in 2005, the Belgian Junior Championship in 2007 and 2009, the Belgian Young Rider Championship in 2011 and he was a medallist twice at the 2006 Children's European Championships.
Constant competed in his first LGCT Grand Prix at the Final in Doha in 2013 and placed 5th. He was then 3rd in his second LGCT Grand Prix in Antwerp 2014.
2006 Children's European Championships Team Silver and Individual Bronze medallist
Competed in the 2007 and 2009 Children's, Pony and Junior European Championships
4th 2007 Pony European Championships Team event
3rd 2014 LGCT Antwerp Grand Prix with Citizenguard Toscan de Sainte Hermelle