Professor David Jennings began his martial arts career as a judo student at Cahill's Judo Academy in San Bruno, California in 1965.  Five years later Cahill's began jujitsu classes.  David found that this discipline suited his primary interest which was self-defense.  He progressed rapidly in jujitsu earning his black belt at the age of 18.  David continues his association with Cahill's by sharing the teaching duties of jujitsu classes twice a week.  Often times David has been the beginning adult's first introduction to martial arts.  His perseverance, patience and embodiment of ohana-sharing- have fostered many others lifelong commitment to martial arts.

In addition to his 7th degree black belt rank in jujitsu David also holds a 1st degree black belt in judo and has an active interest in wing-chung kung fu.  He is a lifetime member of the U.S. Judo Association and Jujitsu America (JA).   He is currently a member of the JA standards committee and participates in other projects at the request of the JA Board.

He was inducted into the JA Black Belt Hall of Fame in 2000.

David balances his martial arts teaching with his profession as a mechanical engineer.  He lives in Moss Beach, California with his wife of almost twenty years, Rita.