Career
Heynen started out his career as a volleyball coach in his hometown club Noliko Maaseik. In 2005 he became assistant coach and a year later he was head coach. In 2012 he left his hometown club and join to join Turkish club Ziraat Bankası Ankara, where he coached in 2012/13 season.
In December 2013 he was named a new coach of Transfer Bydgoszcz.
In February 2012 he became a coach of Germany national team 2007 Belgian Cup, with Noliko Maaseik
2007 Belgian SuperCup, with Noliko Maaseik
2008 Belgian Cup, with Noliko Maaseik
2008 Belgian Championship, with Noliko Maaseik
2008 CEV Cup, with Noliko Maaseik
2009 Belgian Cup, with Noliko Maaseik
2009 Belgian Championship, with Noliko Maaseik
2009 Belgian SuperCup, with Noliko Maaseik
2010 Belgian Cup, with Noliko Maaseik
2010 Belgian Championship, with Noliko Maaseik
2010 Belgian SuperCup, with Noliko Maaseik
2010 CEV Cup, with Noliko Maaseik
2011 Belgian Championship, with Noliko Maaseik
2012 Belgian SuperCup, with Noliko Maaseik
2012 Belgian Cup, with Noliko Maaseik
2012 Belgian Championship, with Noliko Maaseik
2014 World Championship, with Germany.
