Sheldon Marr is the Chief Instructor / Founder of the Grappler's Edge Academy in Denver , CO , the Defensive Tactics Instructor for the Denver Sheriff Department, and has been involved in the Martial Arts for more than 40 years.

A former Judo and Wrestling Champion himself, his students have won National and International titles in Judo, Wrestling, Pankration and MMA, and 8 U.S. National Team Titles in Jujitsu and Submission Wrestling to date. 

Marr has been recognized as the "Instructor of the Year" by: Jujitsu America , The World Martial Arts Hall of Fame, The International Black Belt Hall of Fame, The United States Martial Arts Hall of Fame, and The U.S. Federation of Pankration Athlima.

The 2000 U.S. Pankration Team Coach credits his success to having had great Instructors himself including: Wally Marr, Willy Cahill, Wally Jay and Charlie Lee.