Robbie Singh Robbie Singh is the head instructor at Gracie Jiu-Jitsu Burwood with 11 years of experience practicing Gracie Jiu Jitsu. Robbie currently has the honour of holding the rank of Black Belt under 3rd Degree Black Belt Professor David Krstic. In January of 2016, Robbie completed the Instructor Certification Program under the Gracie Jiu-Jitsu® … Continue reading Instructors