Sensei Eric Renner is the head instructor of Renner Jujitsu Club and a senior jujitsu instructor at Cahill's Judo Academy in San Bruno, CA. He was first introduced to Kodenkan Jujitsu by his father, Bob Renner, who had been a student of Prof. Ray Law in Oakland, CA. His formal training began in 1982 under Prof. Sig Kufferath, with whom he trained for 13 years, and Prof. Richard Bunch, with whom he trained for 19 years. Sensei Renner continues his training under Prof. Willy Cahill, who he has known and had the honor to train with since 1986.

Sensei Renner holds the rank of Rokudan (6th Degree Black Belt) in Kodenkan Jujitsu under Coach Cahill and Jujitsu America, has been a member of the organization since 1986, and is a Life Member. He also holds black belt rank from the Kodenkan Yudanshakai under Prof. Joe Holck in Kodenkan Jujitsu and from the International Martial Arts Federation in Japan (Kokusai Budo Renmei) in the art of Nihon Jujitsu. He holds a Shodan grade in Judo. He has been certified in Okazaki Restoration Massage (seifuku jitsu) by Prof. Kufferath and Prof. Tony Janovich. He has appeared in magazine articles promoting the art of jujitsu and in Prof. Cahill's Danzan Ryu Jujitsu video series. He competed in the first Jujitsu West Coast Championships held in Los Angeles and took First Place in the Sport Jujitsu Championship in the lightweight black belt division.

He has coached and produced over 20 Sport Jujitsu national champions, dozens of national championship medalists, and many more champions in other events.

He currently serves as President of Jujitsu America, as the Chairman of the JA Sport Jujitsu Committee, and as a member of Jujitsu America's Standards Board, and also for the US Judo Association's Jujitsu program on the Jujitsu Executive Committee and Standards Board. Previously, he has served as Jujitsu America's 1st Vice President from 2007-2009 and as Registration Chairman from 2000-2007. He was a recipient of Jujitsu America's Ohana Award in its inceptive year, was recognized as Jujitsu America's Instructor of the Year in 2000, has received several Presidential Service Awards, was twice inducted into the Jujitsu America Black Belt Hall of Fame in 2003 and 2005, was humbled to receive the Wally Jay Award in 2004, and was most honored to receive the Willy Cahill Jujitsu Award in 2004.

Sensei Renner is deeply honored to work closely with his instructor Coach Willy Cahill to present Sport Jujitsu Tournaments and events several times a year, culminating with the annual Jujitsu America Sport Jujitsu US National Championship Tournament. These tournaments and events are presented in longtime partnership with Tiger Claw.

Sensei Renner has taught and demonstrated Kodenkan Jujitsu and Sport Jujitsu throughout the US, and in Europe and Asia, for various organizations including Jujitsu America, US Judo Association, Kodenkan Yudanshakai, AJJF, Shoshin Ryu Yudanshakai, Disney's Martial Arts Festival, IMAF, ATAMA, and others.