Paul Vunak's journey began in 1976, when he walked through the doors of Dan Inosanto's Filipino Kali Academy in Southern California. Inosanto was Bruce Lee's protégé, training partner, and one of only three men Lee personally authorized to teach his art — and after Lee's death in 1973, the mantle of Jeet Kune Do passed to him. Over the next three decades, Vunak trained under Guro Inosanto as one of his top instructors, earning the rank of Full Instructor in Jeet Kune Do and Kali.
Inosanto had a habit of matching students to the instructor who fit them best. Those drawn to raw, real-world street fighting were sent to Vunak. That focus shaped everything that followed. In 1986 he founded Progressive Fighting Systems (PFS), an organization built not around rigid technique but around superior training methods — the idea that there is no "best" move, only the right tool for the range and the moment.
His training in the Filipino martial arts under Inosanto gave Vunak a deep command of Kali: the stick, the knife, and the empty-hand systems that flow between weapon and limb. These principles run through his teaching to this day, where edged-weapon awareness and trapping-range tools sit alongside the boxing, kicking, and grappling ranges that make up a complete fighter.
Vunak was also among the first Americans to train Gracie Jiu-Jitsu, learning directly under Rorion, Royce, Royler, and Rickson Gracie in the early days before the family's art reshaped martial arts in the West. That ground-fighting foundation completed his picture of real combat — standing, clinching, and on the ground.
From these threads — Jeet Kune Do, Filipino Kali, and Brazilian Jiu-Jitsu — Vunak distilled the R.A.T. system, a close-quarter combat system stripped down to what works under pressure: headbutts, knees, elbows, and relentless forward pressure from the clinch. It proved simple enough to teach fast and brutal enough to matter, which is why the U.S. Navy SEALs brought him in to train their operators — alongside work with other elite military and law-enforcement units over the years.
Today, through online programs, live retreats, and one-on-one training, Paul Vunak continues to carry Bruce Lee's vision forward: that the goal of martial art is not to collect techniques, but to express yourself honestly and effectively when it counts.