_bjjxyogastudio head Jiu Jitsu instructo


Head Jiu Jitsu Instructor

Jeff started his Brazilian Jiu Jitsu journey in 2009 at Revolution Mixed Martial Arts in Langley BC, which at time was being run by Bibiano Fernandes. In 2011, Jeff started training under De La Riva Black Belt, Don Whitefield at West Coast Mixed Martial Arts eventually earning his Blue Belt. Shortly after, a job opportunity brought him to the City of Angels where he trained under Rubens “Cobrinha” Charles, this is where his passion for the art manifested, training with the worlds best day in and day out. With another job opportunity presenting itself in the Windy City, he decided to take a leap of faith, leaving behind the Mecca of BJJ. He took one class at Rio Jiu Jitsu and never looked back. His current Professor, Pete “The Greek” Letsos has led him through his next belts from Purple, Brown to being PTG’s 8th Black Belt. Pete is a Carlson Gracie Senior Black Belt. @bjjxyogastudio is excited to open its doors on Sep 15th, with Jeff leading the Jiu Jitsu program! 

Notable accolades:
2021 IBJJF Chicago Summer Open; Master 2 Black Belt Champion
@f2wbjj Veteran
2018 Pan Am Master Silver Medalist (Brown)
2018 Chicago Open Master Gold Medalist (Brown) 2014 (Blue)
Multiple time Silver and Bronze medals (Blue/Purple/Brown) 
3X Naga champion

Introducing _bjjxyogastudio very own Hea


Head Yoga Instructor

Deanna started her yoga journey shortly after becoming a new mom. She struggled with anxiety for years and began suffering from anxiety attacks while pregnant with her daughter. Devoting time to her mat allowed her to overcome her attacks and learn different ways to calm the mind and body. In February 2018 she completed her 200 hour teacher training through Chicago School of Yoga. With a background in dance Deanna brings a firm understanding of the human body and how to easily modify allowing yoga to be accessible to all. She also has experience teaching children and believes yoga can serve for any age and body. In her classes you can expect a fun, upbeat and safe space where any and all are welcome. 


RYT- 200 Hour Teacher Training from the Chicago School of Yoga in February 2018


Yoga Alliance Member



Women's Brazilian Jiu Jitsu Instructor

Heather is an experienced self-defense coach. Before moving to Chicago, Heather would teach self-defense classes with the local law enforcement, at community fundraising events, and at the local elementary schools. Her mission is to help those who are in at-risk groups learn valuable tools that are proven to be effective in confrontational situations. Beyond teaching self-defense skills, Heather has been training and competing in BJJ for the past 8 years. She has achieved the rank of brown belt and has

competed all across the country.


Notable accolades:

2017 Grappling Games Champion

2018 Pan Ams No Gi Silver Medalist



Kids Brazilian Jiu Jitsu Instructors

Father and son duo that have been training together since 2014. Rodolfo is an esteemed brown belt with competition experience. He is a father of four who values the art and discipline that bjj offers to kids. Diego earned his blue belt in 2020 and has been an apprentice under Owner and Head BJJ instructor Jeff Yumul. Diego is the 2020 NAGA juvenile champion. 



Boxing/ Striking Coach

Jason was born and raised in the south side of Chicago. We are excited to have him be a part of our team at BJJ X Yoga Studio. Jason teaches the fundamentals of boxing/ striking. He got started in MMA in 2009, first training under Victory MMA. In 2015 Jason began training at Chicago Mixed Martial Arts. From 2017- 2018 Jason earned a spot on the "Fight Competition Team" under the late Brian Gassaway improving his striking skills. He has earned his Green Level coaching certification under USA Boxing.