) is a football

Football (soccer)

Association football, more commonly known as football or soccer, is a sport played between two teams of eleven players with a spherical ball...

 coach

Coach (sport)

In sports, a coach is an individual involved in the direction, instruction and training of the operations of a sports team or of individual sportspeople.-Staff:...

. Currently he is one of the assistant managers at the Dutch national team.

Voorn made his first steps in professional football in the 1990s when he became assistant manager at Fortuna Sittard

Fortuna Sittard

Fortuna Sittard is a football club in Sittard, Netherlands. The club currently plays its football in the 12,500 capacity Trendwork Arena and features in the Dutch Eerste Divisie. The club was a merger of former clubs 'Fortuna 54' and 'Sittardia' to merge as the Fortuna Sittard Combinatie on July 1,...

 where he worked alongside Bert van Marwijk

Bert van Marwijk

Bert van Marwijk OON is the coach of the Netherlands national football team. He also played for Go Ahead Eagles, AZ, MVV, Fortuna Sittard, and other clubs, as well as for the Dutch national team. In 1982, he began his transition into coaching, retiring as a player in 1988 and becoming a full time...

. The two, as well as rehabilitation coach Egid Kiesouw

Egid Kiesouw

Egid Kiesouw is a football coach. Currently he is the fitness and rehability coach at Feyenoord Rotterdam.Kiesouw studied and graduated to become a physiotherapist. He made his first steps in professional football in the 1990s when he became fitness coach at Fortuna Sittard where he worked...

 became close friends and a dynamic trio. Together they brought Fortuna Sittard into the 1999 KNVB Cup

KNVB Cup

The KNVB Cup is a competition in the Netherlands organized by the Royal Dutch Football Association since 1899. It was based on the format of the English FA Cup. Outside of the Netherlands, it is often referred to as the Dutch Cup...

 final.

Van Marwijk left Fortuna and moved to Feyenoord Rotterdam

Feyenoord Rotterdam

Feyenoord is a Dutch professional football club located in Rotterdam. Along with Ajax and PSV Eindhoven, Feyenoord is one of the "big three" clubs in the Netherlands. These three clubs and Utrecht and Roda JC are the only clubs never to have been relegated from the Dutch first division...

 where he would win the UEFA Cup

UEFA Cup

The UEFA Europa League is an annual association football cup competition organised by UEFA since 1971 for eligible European football clubs. It is the second most prestigious European club football contest after the UEFA Champions League...

. After that success he went to the Bundesliga

Fußball-Bundesliga

The Fußball-Bundesliga is a professional association football league in Germany. At the top of Germany's football league system, it is the country's primary football competition. It is contested by 18 teams and operates on a system of promotion and relegation with the 2. Bundesliga...

 to manage the team Feyenoord beat in the UEFA Cup final, Borussia Dortmund

Borussia Dortmund

Ballspielverein Borussia Dortmund, commonly BVB, are a German sports club based in Dortmund, North Rhine-Westphalia. Dortmund are one of the most successful clubs in German football history. Borussia Dortmund play in the Bundesliga, the top league of German football...

. Van Marwijk appointed his own staff and both Kiesouw and Voorn were appointed. The financial situation at the club was tough and the trio did all they could to get the best out of the team. They succeeded, although they were unable to earn any prizes. When Van Marwijk and Dortmund split up during the 2006-07 season Voorn and Kiesouw remained at the club until the end of the season.

During the summer break Van Marwijk returned to Feyenoord and technical director Peter Bosz

Peter Bosz

Peter Bosz is a former football midfielder from the Netherlands currently serving as head coach of Dutch Eredivisie team Heracles Almelo.-Career:...

let him appoint his own staff, which meant Voorn and Kiesouw re-joined Van Marwijk in his mission to bring Feyenoord back to the top.