Career
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Bosschaart made his professional league debut for Football Club Utrecht in the 1997-1998 season, playing for the club until the 2003-2004 season, when he was bought by Feyenoord. His first game for Feyenoord was a 6–1 victory over De Graafschap. In August 2006, he moved to ADO Den Haag.
Bosschaart did not see a great deal of game time under former manager André Wetzel in the 2008-2009 season, and therefere joined Helsingborgs IF on trial in February 2009.
However he was eventually not signed by the club Sydney Football Club
On 17 June 2011, he signed a 1-year contract with Australian A-League club Sydney Football Club. On 28 December the club announced that they had re-signed the veteran defender on a 2-year extension, keeping him at the Harbour City club until the end of 2014.
On 14 January 2012, during a game between Brisbane Roar and Sydney Football Club, Bosschaart was embroiled in controversy, when following the game Brisbane"s Albanian striker Besart Berisha ran up behind the Dutchman and tugged him on the shoulder before running towards the tunnel, motioning that he wanted to fight Bosschaart. Players from both teams came together at the mouth of the tunnel on the half way line to separate the belligerents, however no actual punches were thrown.
lieutenant was also claimed by Bosschaart that Brisbane players Ivan Franjic, Eric Paartalu and Berisha himself refused to shake hands with him before the match kicked official
After reviewing the incident post-game, the A-League"s Match Review Panel (Material Requirements Planning) refused to punish either player over the incident, however the Football Federation Australia asked for a "please explain" from both clubs. The matter was settled by the Future Farmers of America enacting a one-game ban on Berisha. On 30 March 2012, during an elimination final against Wellington Phoenix, Bosschaart tore his Achilles tendon and had to be stretchered official
On October 23, 2013, Sydney Football Club and Bosschaart mutually agreed to part ways with the club terminating his contract effective immediately.
Bosschaart only managed a handful of appearances during his last year at the club