Diane Ortenzio-Cooling, a sixth degree black belt, has been training in the martial arts for over twenty-six years. She is the chief instructor (sensei) at Sierra Dojo. In addition to Isshin-Ryu Karate and Kobudo (traditional weapons), she also trains in grappling arts, modern weapons, and personal safety.

Sensei Ortenzio's passion for the martial arts is contagious, and her caring attitude for her students is evident. She believes that steady training with attention to detail and an emphasis on the underlying principles of martial arts will build individuals with strength and the ability to handle themselves in any situation.

Sensei has dedicated her life to empowering students to learn and grow as individuals through martial arts training.

Isshin-Ryu Karate
The core art taught at Sierra Dojo is Isshin-Ryu Karate. It is a fusion of two other Okinawan forms of karate, Shorin-Ryu and Goju-Ryu, as created by Master Tatsuo Shimabuku. The style is characterized by swift, powerful punches and kicks delivered from natural body positions. 

Students begin by learning proper body  mechanics, power generation, focus, accuracy of technique, and how to use their intelligence to prevent violence or bring it to a swift and successful conclusion.

As students progress, they are exposed to more depth and breadth in training. Grappling, joint locks, and control techniques are all part of the Isshin-Ryu system, as well as traditional and modern weapons.

This art and this dojo is for people who want to know why and how things work...and what will work for their age and body type.

We do not conduct gradings every week or month. They occur when a student has demonstrated their understanding of the principles they have been exposed to, and their ability to apply that knowledge.

You can buy a belt for $5 at any martial arts supply store. What makes the belt legitimate and worth something to the wearer is the knowledge learned and the character they developed while earning it. This is the basis for belt promotions in Sierra Dojo. 

We believe in the power of the spirit, and the positive change it can bring about in our lives. Through a structured program of Isshin-Ryu Karate, we will help individuals to accomplish their personal goals of good physical fitness, effective self-defense, and black belt achievement.

We will challenge our students to do their best, be the best, and bring out the best in themselves and others in our community. We believe this path involves the principles of honor, integrity, honesty, fortitude, and humility.