 Thiessen was placed on a short-term contract the A-League club in September 2006 to cover for the injured Robbie Middleby, and played in one senior game for the team before leaving to play for Marconi Stallions and Sydney Olympic.In March 2008 Thiessen re-located to the United States to attend college at the University of New Mexico.After failing to be cleared by the NCAA clearinghouse he moved on to the University of Rio Grande in the NAIA.