GST Master Instructors

Rener Gracie

Rener Gracie

Rener Gracie is the CEO of Gracie University, and under his leadership, GST has become the leading jiu-jitsu-based defensive tactics program in the world. Even though he's not a law enforcement officer himself, his 20+ years working side-by-side with local, state, and federal agencies have made him keenly aware of the work that needs to be done in order to overcome the social, political, and economic challenges standing in the way of higher standards in defensive tactics across the country.
"The 'Renergy' is real.
Hands down, the best instructor I've ever had in any subject. Period."
"The 'Renergy' is real. Hands down, the best instructor I've ever had in any subject. Period."
Ryron Gracie

Ryron Gracie

Ryron is the co-owner of Gracie University and has over 20 years of experience teaching military and law enforcement personnel. Ryron still travels regularly to teach GST courses throughout the country. If you're lucky enough to have Ryron as your instructor, you'll love the clear instruction, calm demeanor and positive energy he brings to every class.
"Ryron made things
easy to understand and
helped each and every
person understand. Hands down a great instructor."
"Ryron made things easy to understand and helped each and every person understand. Hands down a great instructor."
Evandro Nunes

Evandro Nunes

Evandro is a Gracie Jiu-Jitsu black belt who was born and raised in Brazil. After several years of success at the elite BJJ competition level, Evandro immigrated to the United States and joined forces with Gracie University. He was handpicked by Ryron and Rener to help lead the GST program based on his ability to connect with and captivate any audience. Evandro’s profound knowledge, infectious enthusiasm, and deep gratitude for law enforcement officers make the GST course a life-changing event for all those lucky enough to learn under his leadership.
"Evandro is
excellent. He
opened my eyes to
certain things I did not
realize I was missing. He
helped me improve as an instructor and a person."
"Evandro is excellent. He opened my eyes to certain things I did not realize I was missing. He helped me improve as an instructor and a person."
Tom Chuckerel

Tom Chuckerel

Tom began his law enforcement career with the Montgomery County Police Department in 1994. After serving as a patrol officer, field training officer, and background investigator, Tom became an instructor at the police academy where he taught defensive tactics to both in-service, as well as recruit officers. In 2019, Tom was awarded a black belt in Gracie Jiu-Jitsu. Then, after 25 years of service, Tom retired from law enforcement to teach GST full time. If you're lucky enough to learn from Tom, his deep pool of knowledge and his love for people will leave an impact on you that will last long after the course is over.
"Tom was EPIC.
He is a master at the
moves and the teaching methodology. But what was super cool is that he has the spirit of a Gracie."
"Tom was EPIC. He is a master at the moves and the teaching methodology. But what was super cool is that he has the spirit of a Gracie."
Allan Manganello

Allan Manganello

Allan retired as the lead Defensive Tactics instructor at the Louisville Metro Police Department after 21 years of service in order to spend more time traveling and teaching GST across the country. He started learning jiu-jitsu with the Gracie Family in 1994 and opened his first BJJ school in 1996. In 2016, his school became the first Gracie University Certified Training Center in Kentucky, and in 2022, Allan was promoted to 4th degree black belt by Ryron and Rener. As a GST Leader, Allan has a special way of explaining techniques that makes them very easy to learn and so fun to practice regardless of your experience level.
"Allan is a great
instructor and very
personable. He legitimately cared about our ability to understand, learn, and apply the techniques."
"Allan is a great instructor and very personable. He legitimately cared about our ability to understand, learn, and apply the techniques."
Nate

"Nate"

Nate has over 29 years of combined law enforcement and military experience. After serving over 7 years in the U.S. Army, Nate became a police officer, detective, and then an FBI Special Agent. He has over 16 years of defensive tactics and firearms instructor experience. He is a black belt in BJJ with over 28 years of grappling experience. His teaching style is smooth and incredibly encouraging. It doesn't matter if your brand new to jiu-jitsu or you're a seasoned grappler, you'll never forget the first time you share the mat with Nate.
"Nate was
personable, easy
to approach, easy
to talk to, and constantly positive from the moment he walked into the room until the end of the week."
"Nate was personable, easy to approach, easy to talk to, and constantly positive from the moment he walked into the room until the end of the week."
John Ingallina

John Ingallina

John has been teaching martial arts since 1989 and specializes in building safety and security protocols for thousands of clients with an emphasis on defensive tactics for law enforcement. John holds multiple black belts in various martial arts disciplines and currently owns a Gracie University Certified Training Center in western New York. To compliment his calm and professional demeanor, John has a unique ability to make the techniques work for every student, regardless of their age or physical ability, that makes learning from him fun and extremely encouraging.
"John was amazing.
His love for this craft really shows. He knows how to get people engaged and keep them engaged."
"John was amazing. His love for this craft really shows. He knows how to get people engaged and keep them engaged."
Charlie Fernandez

Charlie Fernandez

Charlie retired from the Arlington Texas Police Department with 29 years of service, where he served as the Defensive Tactics Coordinator. Charlie served as the agency's subject matter expert in use-of-force analysis/litigation and policy development. In addition to instructing GST courses around the country, Charlie serves as Gracie University's Director of GST Operations. With over 15 years of GST teaching experience and nearly double that behind the badge, the courses Charlie leads provide students with a one-of-a-kind learning experience that will completely transform the way you think about defensive tactics.
"Charlie was an amazing resource and was excellent all week. Couldn’t ask for a better lead instructor."
"Charlie was an amazing resource and was excellent all week. Couldn’t ask for a better lead instructor."