Hargrave, a native Oklahoman received martial arts training from instructors located throughout the United States. In 1993 he received the Instructor of the Year award for his teaching in the art of Jeet Kune Do, the style founded by Bruce Lee, and was also inducted into the World Martial Arts Hall of Fame. In 1995 Hargrave was the youngest person to be promoted to Professor of martial arts and he received the Instructor of the Year award for his teaching in Karate. In 1996 he received the award for Best Martial Arts School in the United States, and was recognized by U.S. Congress and the United States Senate for this achievement. Hargrave holds instructor / black belt rankings in Kempo Karate, Kung Fu, Goshin Jutsu, Jeet Kune Do, Aiki Jitsu, Tae Kwon Do, and is the author of two martial arts books. Hargrave is the founder SOKE of the styles known as Combat Martial Arts and American Combat Kempo which he introduced in 1992, and in 2000 was presented the International Founders Award by Dr. E.A. Moore (President of the World Martial Arts hall of Fame)for the defense system.