Head Instructor


Krav Maga 2nd Degree Black Belt

Brazilian Jiu Jitsu Black Belt

AMOK! Instructor

Sean has the distinction of being one of the first people to hold simultaneous Black Belts in Brazilian Jiu Jitsu and Krav Maga. There are less than a dozen people in the world who have reached this goal.

Sean currently teaches multiple audiences ranging from law enforcement and military to civilians. Our programs teach men and women of all ages how to defend and protect themselves in real life situations, as well as give people a way to get in shape and advance their training. Sean regularly does group classes, private and corporate training, law enforcement military and security training and consulting

Brazilian Jiu Jitsu Black Belt

Andrew Stewart

Professor of Brazilian Jiu Jitsu Under Professor Sean Stoopman & Tom DeBlass


Andrew is an active competitor and a very technical Black Belt in Brazilian Jiu Jitsu. Andrew has a long competitive track record with a extensive string of gold medals in advanced Gi & No Gi  divisions .  Known as a leg lock specialist focusing on No Gi competitions, he is sought out for knowledge of competition and has built his game around the submission only format.   

Krav Maga

Kingsley Jefferson



2nd Dan Krav Maga Black Belt & Certified Instructor

1st Dan Black Belt Full Contact Kickboxing

Level Two Filipino Martial Arts Instructor

Adaptive Close Quarter Combat Level 2 Coach


Kingsley came to Silverback Academy to study Brazilian Jiu-Jitsu, Kickboxing and Wrestling under Master Instructor Sean Stoopman. For the past 17 years he has trained in a number of traditional and modern martial arts. In an effort to diversify his abilities, he has studied everything from Ketsugen Karate, JKD, Kali-Silat, Muay Thai Kickboxing, and Ninjitsu; also holding Dan ranking in the Korean arts of Taekwondo and Hapkido. In September 2012 Kingsley earned his 1st Dan Black Belt in Israeli Krav International Krav Maga and now serves as an assistant Krav instructor at Silverback Academy.

BJJ Instructor


Brazilian Jiu Jitsu Purple Belt
Level One Filipino Martial Arts Instructor
Level One Jeet Kune Do Instructor

Alexa first began her Krav Maga training in 2012 at Silverback Academy. Alexa has achieved her Green Belt in Krav Maga, and is a Level 1 FMA Instructor and Level 1 JKD instructor under Sifu Roy Harris, a Brazilian Jiu Jitsu purple belt under Professor Tom DeBlass and Sean Stoopman.  Alexa now focuses her time on training Brazilian Jiu Jitsu and teaching the womens class. 

Wrestling Coach

Thomas Domerese began his grappling journey with the sport of wrestling following his passion through high school and then into the MMA scene in his early college years. After joining the Air Force “Dom” as he likes to be called tried out and attained a position on the All Air Force International Team. Following several high level performances at US Nationals he placed silver in the armed forces championship an Olympic trials qualifying event. He cross trained jiu jitsu to stay sharp on the mats while stationed in Korea and quickly fell in love with the art and also the sport. During all of his training, he has coached both wrestling and jiu jitsu from youth levels to adult adding to his already sound knowledge it brought with it a great coaching mentality and a love for passing on knowledge of grappling. He brings his high level wrestling and passion for the art of grappling to every class along with his 7 plus years of coaching to make for a standout opportunity to learn.

Thomas Domerese

All Air Force Wrestler

Purple Belt


14740 Flint Lee Rd, Suite F Chantilly , VA 20151, USA

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