Jonathan Jamnik began his training in January of 2000 at Carleton University under Sensei John Molyneux Nidan. In the summer of 2000, and subsequently during the next two summers, he trained at the Ottawa Metro YMCA under Sensei Colin Welburn Shodan. In September of 2000 he returned to Carleton University and began training with Sensei Kieran Parsons Shodan.

In December of 2002 he had the privilege of instructing at the Ottawa Metro YMCA club and taught there until August 2005.

In the summer of 2004, while living in Plymouth, England, he trained at the University of Plymouth Samurai Jiu Jitsu Club under Sensei Mark Browne Shodan. During that time he also trained at the China Fleet Club in Cornwall under Sensei Greg Regan Sandan, founder of the Ryu Ju Jutsu Association.

On September 25th 2004, during the last Dan grading held by the late Brian Graham Shihan, founder of Shorinji Kan Jiu Jitsu, he was one of five to be awarded his black belt.

In September 2005 he assumed the position of instructor at the Carleton University club, where he continues to teach to this day.