ベルト・ファン・マルワイク
Voorn made his first steps in professional football in the 1990s when he became assistant manager at Fortuna Sittard where he worked alongside Bert van Marwijk. The two, as well as rehabilitation coach Egid Kiesouw became close friends and a dynamic trio. Together they brought Fortuna Sittard into the 1999 KNVB Cup final.