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 several Sport Jujitsu national champions, over a dozen national championship medalists, and numerous Disney's Martial Arts Festival champions.

He currently serves as First Vice President of Jujitsu America, as the Chairman of the JA Sport Jujitsu Committee, and as a member of Jujitsu America's Standards Board. Previously, he has served 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 serve as co-coordinator along with Coach Willy Cahill for the Sport Jujitsu Tournaments presented twice a year as part of the Disney's Martial Arts Festivals since 2006, as well as the annual Jujitsu America Sport Jujitsu US National Championship Tournament and other competitions and events.

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, Disney's Martial Arts Festival, Kodenkan Yudanshakai, AJJF, Shoshin Ryu Yudanshakai, IMAF, ATAMA, and others.