Team | Pentagon Mixed Martial Arts

Secure your spot and get started today with our EXCLUSIVE offer!


Secure your spot and get started today with our EXCLUSIVE offer!

Caitlin D

I cannot say enough positive things about Pentagon MMA. I moved to VA without knowing anyone and I quickly made life long friends here. In addition to these connections, I learned not only Muay Thai, but the ART of Muay Thai. I cannot stress how rare this is. Pentagon MMA is not just a cardio kickboxing class. You will learn proper technique, the art of Muay Thai and its origins, and boost your self-confidence. Vivek was the best teacher I have ever had in Muay Thai, and I have yet to find a school that even comes close to PMMA now that I have moved north for work. Best Muay Thai school around!

Corin C reviewed Pentagon Mixed Martial Arts
via Facebook

I am a complete newbie when it comes to Muay Thai. I have grappled with some friends with jiujitsu and always wanted to get back into some sort of martial art but as a female, I always felt intimidated as usually these places are male-dominated. I did not have to worry about that here! The instructors have always been informative, patient, and kind. It must rub off onto the people to as they have been super nice as well. I'm glad I signed up! Will continue this until I move out of the area but I definitely have a better appreciation for Muay Thai now thanks to Pentagon MMA.

Julia Benson

Awesome place. I love training here. Have been learning Muay Thai for over a year. The trainers are excellent and the community outstanding. The facility is always clean and all the staff is very friendly. I would recommend this gym to anyone: Beginners and advanced. Master Chon keeps the lessons interesting so that you will learn something new.

Beth B

My son is in summer camp at Pentagon MMA in Arlington. It's fantastic -- he's really happy and they have a very organized and well-run program. In addition to martial arts, they take several field trips (and even had a back-up field trip set up for a rainy day), and do a lot of activities with character-building elements. When I picked him up a few minutes early at the end of his first day, he asked me if he could stay longer and keep playing with his new friends. I'm very impressed with the staff and coaches, and I definitely plan to sign him up again next summer.

Alexis T reviewed Pentagon Mixed Martial Arts
via Facebook

My son went to Spring Camp here. We had not seen the facility before we dropped him off the first day so he was a bit nervous (as was I), but within minutes the welcoming staff made us feel comfortable and gave clear directions on how we could jump into the fun. When I picked him up that first afternoon, he said "Mom, you know what I liked about camp? EVERYTHING". He wanted to tell me about his day every day of camp, when I am normally prying it out of him. Huge hit and we will definitely be back.

Kieran Tomlinson

Pentagon MMA is excellent!!! My 4-year-old son started with the aim of learning self-defence, but he has learnt so much more! His confidence, listening and responsiveness, and focus and concentration have all improved!!! Thanks Pentagon MMA.

Bella D reviewed Pentagon Mixed Martial Arts
via Facebook

My older kid started coming here a few months after I did (she's 4). It's been amazing - from the facility itself (clean, open spaces) to the staff (professional, welcoming). There is an air of humility and hard work that permeates and is contagious -- and you can see it stems from the leadership of owner Kru Vivek.

Jake D

I cannot explain how much this has helped my four-year-old daughter. Your head would explode if you heard her shouting "yes sir" and "yes ma'am" around the house for chores. She has taken to the discipline very well and it's helped in her academics and in her social life, not to mention that she is learning to defend herself with some solid foundations.

Mike K

My kids studied at Pentagon MMA for several years each. Vivek and the other instructors taught them how to defend themselves, how to defuse tense situations, how to stick up for kids being bullied, how to conduct themselves with maturity and respect for others, and how to be mentally and physically tough. All of these lessons transferred to their lives outside of MMA. They are respectful, confident, and mature young people now. In addition to being proficient at MMA, the mental and physical rigor and determination they learned at Pentagon has been critical in one of them transitioning to collegiate athletics and the other on the way to doing so. The discipline and focus have also led to high GPAs and a drive to succeed. I can't recommend Pentagon MMA highly enough. It's been central to the successful development of my kids.

Kadeam Vendryes reviewed Pentagon Mixed Martial Arts
via Facebook

I’m new to learning Brazilian Jiu Jitsu, and I wanted to learn the art from a gym that would push me to be great but also accept me as part of a family/team. I’m happy to say that Pentagon MMA is just the place, where I have found both and more. I’m still very new to the sport and the gym but I feel confident that I will be training at the gym for a while even though I live a decent distance away. Pentagon MMA has exceptional customer service, great instructors, and welcoming members! I highly recommend this gym to new and experienced martial artist OSU!

Mary Ellen Hickman reviewed Pentagon Mixed Martial Arts
via Facebook

I highly recommend Pentagon MMA. I've been taking the women's kickboxing classes since November. Staff members are warm, welcoming, and immediately made me feel comfortable. I love the instructors (Belinda and Patti are particularly fantastic) and the challenging and supportive environment. If you're on the fence, try a free class or two. I think you'll love it.

Joi Calia reviewed Pentagon Mixed Martial Arts
via Facebook

I’ve been coming here for several months and I love it. I started coming because I felt bored with my usual workouts. Kickboxing is like no other and will kick your butt. The gym is so welcoming and there are people of all fitness levels and ages. The classes are tough but manageable and I’m getting in the best shape of my life. Highly recommend.

Levi Vise-grip Sadr reviewed Pentagon Mixed Martial Arts
via Facebook

Pentagon MMA has a range of different programs unlike many other gyms. It is wonderful for those who want to get fit and it's serious enough for those who want to fight. They have an amazing kids program as well

Karen Yvonne Lucas reviewed Pentagon Mixed Martial Arts
via Facebook

There is no better place to train for your children or for you. Very Highly Recommended. Say hello when you visit !!

Katrina Combs reviewed Pentagon Mixed Martial Arts
via Facebook

I couldn't ask for a better fight home. This gym makes you feel like you are amongst friends and family. The staff are awesome, the coaches are awesome, and the atmosphere in the gym will give you that charge to put in that extra work!!

Leo Lainez reviewed Pentagon Mixed Martial Arts
via Facebook

Amazing place. The staff is beyond friendly and create a truly welcoming environment. At no point do you feel like an outsider. The training is top notch. Master Chon is a true professional and makes sure you're learning step by step. Walking into Pentagon MMA has been one of the best decisions of my life.

Michelle Welti reviewed Pentagon Mixed Martial Arts
via Facebook

Pentagon MMA is an excellent place to train! Vivek is an outstanding Muay Thai coach and their BJJ instructor, Sugi, is not only a BJJ Black belt but also a 2x Olympic Judoka. They are both friendly, welcoming, and great at what they do! If you are looking to start training in the Arlington area, this is definitely the place to go!

Cindy Ali reviewed Pentagon Mixed Martial Arts
via Facebook

I have seen, from far away, how Pentagon MMA has grown from its beginnings to what it has become today. Vivek, the owner, introduced me to Muay Thai a few years ago and ever since I can’t seem to stop. Vivek showed me the basics to this beautiful art, back then he would tell me about his dream of opening a gym where he could share his knowledge with everyone else. After a few years, I finally went to visit his accomplished dream, his own gym, I was truly impressed. Pentagon MMA is a true Muay Thai school, where people are learning how to perfect their moves. I haven’t yet seen anyone who is there to show off or to put anyone down, everyone is focused and is there to learn. Thank you Vivek for Muay Thai is now part of my life. Thank you Kru Chon for never letting me quit!

Natalie Wong reviewed Pentagon Mixed Martial Arts
via Facebook

I couldn't ask for a better place to train and call my second home! Pentagon MMA has hands down the best instructors. Master Chon and Master Vivek run an awesome Muay Thai program that keeps you fit and always learning more techniques. The gym has a "family vibe" atmosphere and everyone in the community is supportive of your fitness goals. I've already lost 20lbs thanks to PMMA's fight team, training, and encouragement. If you're looking to train with the best, you should definitely check out this gym.

MaryEllen Hickman reviewed Pentagon Mixed Martial Arts
via Facebook

I highly recommend Pentagon MMA. I've been taking the women's kickboxing classes since November. Staff members are warm, welcoming, and immediately made me feel comfortable. I love the instructors (Belinda and Patti are particularly fantastic) and the challenging and supportive environment. If you're on the fence, try a free class or two. I think you'll love it.

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Our Rockstar Team

Kru Vivek Nakarmi

President/Head Instructor

Kru Vivek has been training and competing in the art of Muay Thai (also known as Thai Boxing or Kickboxing) since 2004. Prior to training in Thai Boxing, he trained and competed in San Shou since the age of eight. Kru Vivek has been teaching Kickboxing, Boxing, Muay Thai, Mixed Martial Arts, and Gymnastics to both adults and children of all ages since 2006. In 2016, Kru Vivek was a recipient of Washington Region’s 40 under 40 Rising Business and Community Leaders Award.

  • ISSA Certified Personal Trainer
  • Crossfit Level 1 Trainer
  • Philadelphia Evolve Fighting Champion
  • Certified Kru Muay Thai
  • Kung-Fu Black Belt
  • 2006 WKA National Champion
  • 2006 WKA World Kickboxing Tournament Silver Medalist
  • 2007 WKA World Kickboxing Tournament Bronze Medalist
  • 2009 IKF World Kickboxing Tournament Bronze Medalist
  • 2010 IKF World Kickboxing Tournament Silver Medalist
  • 2014 Thai Championship Boxing 135 lb Championship Title
  • 2015 Warrior’s Cup 135 lb Championship Title
  • 2017 USMTA 135 lb Professional Championship Title

Contact: [email protected]

Diana Nakarmi

VP & General Counsel

Together with Kru Vivek, Diana founded Pentagon MMA in 2012. Diana has been training in Muay Thai under Vivek Nakarmi since 2008, when she moved to the DC metro area. Diana has a JD from the University of Michigan School of Law, an M.B.A. from Florida International University, and a B.S. in Marketing from Florida State University. Before joining the Pentagon MMA family, she was an employment litigator at an international law firm in DC for almost five years. Diana now serves as Pentagon MMA’s in-house counsel and office manager, making sure that everything runs smoothly. Kru Vivek and Diana have two beautiful boys and are also parents to Rocky, a very large German Shepherd pup who loves hanging around Pentagon MMA.

Contact: [email protected]

Grace LeVally

General Manager

Grace practiced Wado Ryu karate for 7 seven years, earning the rank of 1st degree black belt. She is originally from Scottsdale, AZ and has lived in Spokane, WA and outside of Seattle, WA. She received her B.A. in International Relations and Religious Studies from Gonzaga University in Spokane. Grace practices Spanish and Arabic in her spare time and has traveled to 13 different countries. She loves to read fantasy and fiction novels, paint, draw, dance (absolutely any style) and of course, practice martial arts!

Kru "Chon"

Muay Thai and Fight Team Instructor

Tanachon Yingwittayakun (Kru Chon) is known as the Little Giant of Muay Thai. Fighting since the age of ten years old to put himself through school, Tanachon “Chon”) Yingwittayakhun is a two-time Thailand National Champion with over 100 professional Muay Thai fights.  With a Marketing Degree from the prestigious Chiang Mai University, Kru Chon has consulted and been actively involved in the establishment and development of Muay Thai schools all over the world, including Spain, China, Dubai and Norway, as well as top camps in Thailand such as Kaewsamrit, Phuket Muay Thai, Naiharn, Sitmahachon and of course his home gym Kiat Busaba (Lanna Muay Thai).  Also a published author, he co-wrote a book on Thai Boxing called “Muay Thai Unleashed.”  Kru Chon has a deep passion and incredible patience for training all levels of Muay Thai students, from beginners to professional fighters.

Check out his highlight video:

Kru Brooks Miller

Fight Team Manager/Class Instructor

Kru Brooks has been involved in the sport of Muay Thai since 1992 and was a founding member of Kumron Vaitayanon’s (Master K) Suriya Sak Muay Thai Fight Team. He is a 3-time champion in 3 different weight classes, and has taken a part in coaching numerous Muay Thai champions. Brooks was the first to promote full rules Muay Thai events in the state of Virginia (D.C. Metro Showdown 3 on February 27, 2008) and is active as a Muay Thai judge & referee. He is also an author, having contributed in the e-book “Muay Thai: the Art of Fighting,” the USMTA’s “Muay Thai Training Guidebook,” and assisted Master K in transcribing his book “Muay Thai, the Art of Eight Limbs.”

  • 1994 ISMTA Super Middleweight Muay Thai Champion
  • 2004 King of the Ring Light Heavyweight Muay Thai Champion
  • 2004 USKBA Northeast Cruiserweight Muay Thai Champion
  • Suriya Sak Muay Thai Certified Instructor
  • AMTJRA Certified Muay Thai Judge
  • WKA Certified Muay Thai Judge
  • GCA Certified Muay Thai Judge & Referee
  • GCA Certified MMA Judge & Referee
  • USMTA Director of DC, MD, & VA
  • GCA Muay Thai Board of Advisors

Contact: [email protected]

Professor Suldbayar "Sugi" Damdin

Jiu Jitsu and Judo Instructor

Coach Sugi as a world class and highly accomplished Judo and Brazilian Jiu Jitsu practitioner.  He is a Judo Black Belt and Brazilian Jiu Jitsu Black Belt under Master Leo Dalla/Big Brothers Competition Team.  Among his many achievements, Coach Sugi was a Judo Olympian in the 2004 Athens games.  Coach Sugi loves working with both children and adults, and currently teaches Warrior Kids classes and adult Judo, Brazilian Jiu Jitsu, and Competition Team classes.


  • 1st place in World Masters, Miami, USA, 2012
  • 9th place in Olympics, Athens, Greece, 2004
  • 9th place in World Championship, Osaka, Japan, 2003
  • 3rd place in World Cup, Astana, Kazakhstan, 2003
  • 3rd place in Asian Championship, Jeju, South Korea, 2003
  • 3rd place in Asian Games, Osaka, Japan, 2001
  • 6 times National Champion of Mongolia, 1998, 1999, 2001, 2002, 2003, 2004
  • National Champion in Sambo, Mongolia, 2003

Brazilian Jiu-Jitsu:

  • 2nd place in International World Master’s Championship, Brown Belt, 2015
  • 2nd place in International New York Open, Blue Belt, 2011
  • 2nd place in International Chicago Open, Blue Belt, 2011
  • 1st place in International New York Open, Purple Belt, 2015
  • 2nd place in Naga Open (with Gi), Hampton, VA, 2015
  • 1st place in Naga Open (No-Gi), Hampton, VA, 2015

Check out his highlight video:

Coach Nick Agustin

Warrior Kids' Instructor

Coach Nick Agustin has been a certified personal trainer since 2011 after transitioning from the corporate world. He is certified under NCCPT, as well as holding an OTF fitness coaching certification under NASM. His Martial Arts training began with Muay Thai in 1998 under Master K. Coach Nick has also been training in Brazilian Jiu-Jitsu since 2008. When he isn’t teaching group classes at Pentagon MMA, he is working with personal training clients and pushing his students to be their best. Coach Nick always believes that “If it doesn’t challenge you, it doesn’t change you!”

Check out his highlight video:

Marithalia Caton

After School Program Director

Miss Mari is a life-long resident of Arlington, VA and has worked with children since the age of 16. Miss Mari is currently completing her Bachelor of Education (B.ED) in Special Education at Liberty University. She is passionate about applying her teaching experience to build exciting and innovative lessons, academic and art projects, creating a unique and well-rounded After School Program. She fosters a learning environment using creative activities to keep the kids focused, energetic, and enthusiastic about learning. When she’s not working at Pentagon MMA, Miss Mari takes Muay Thai and Women’s Kickboxing classes at Pentagon MMA and has been training for 5 years. As a key member of our After School Program and Camp staff, she works hard every day to make sure our children get the attention and care they need.

Coach Jen Gaines

Class Instructor

Coach Jen originally hails from Laurel, Maryland and currently resides in Alexandria, Virginia. She earned her B.S. degree in Wildlife Management, and later received her Master of Science degree in Environmental Science and Policy. She currently works as a Wildlife Biologist for the Environmental Protection Agency. Jen started playing sports at age 9, and has remained active throughout her life. She began training Muay Thai in May 2008 under Kru Vivek Nakarmi and Kru Brooks Miller and has been hooked ever since, so much so that she is a part of the Pentagon MMA Fight Team, with an amateur Muay Thai fight record of 2-0. Physical fitness has always been a very important part of her life, and she looks forward to helping and motivating others so they may achieve their own fitness goals as well. Jen also enjoys fishing, running, cooking, spending time with her family and friends, and reading.

Coach Belinda Watson

Women's Fitness Kickboxing Instructor

Coach Belinda is an Arlington native who continually gives back to her community. Since graduating from George Mason University with a degree in Psychology, she has worked with Arlington Public Schools for 20 years and currently helps manage the Extended Day programs across the county.

Coach Belinda has a passion for Muay Thai and has been training in Muay Thai since 2005.  She is also Zumba certified and working on additional fitness certifications.  Fitness and martial arts are a family activity for her and you can frequently see Coach Belinda training and working out with her husband and daughter at Pentagon MMA.

Coach James Tower

Muay Thai Instructor

James has been a practitioner and trainer in martial arts for over 20 years. His training experiences include Muay Thai, Jeet Kune Do, Filipino Martial Arts (Arnis/Eskrima/Kali), Brazilian Jiu jitsu and Wing Chun. As a Muay Thai instructor, his focus is technique and endurance. He brings a wealth of knowledge and experience to the gym and will always motivate people to share his enthusiasm.

Coach Patti Ro

Women's Fitness Kickboxing Instructor

Coach Patti has been training in Muay Thai for almost two years.  She is an editor by trade with a Masters in Writing & Rhetoric.  She grew up training in Taekwondo from an early age and has a second degree black belt.  Coach Patti is a member of the Pentagon MMA Fight Team and has a passion for sports and passing on her knowledge of Muay Thai to her students.

Coach Leah Cobelli

Women's Fitness Kickboxing Instructor

Coach Leah is originally from New York and currently lives in Washington, D.C working for the federal government. She became hooked on Muay Thai in 2013 while living in Vietnam and has since trained and competed in both Thailand and Virginia with the Pentagon MMA Fight Team. She loves combining traditional Muay Thai techniques with modern fitness to make sure her Women’s Fitness Kickboxing students get stronger with every class.

Coach Jerry Cotto

Cage Fitness Instructor

Jerry comes to Pentagon MMA with over 15 years of Martial Arts experience.  He served in both the Army and Marine Corps, where he learned Army combatives and Marine Corps Martial Arts.  From there, he discovered Sensei Maurice Allan and began training in the Art of Judo. He has studied and competed in Judo, Brazilian Jiu Jitsu, Boxing, Mixed Martial Arts and Muay Thai.  These days, his focus as a martial artist is primarily on competing in Muay Thai and continuing to grow as a grappler.

Nazar Mazurkevych

Cage Fitness Instructor and Personal Trainer

Coach Nazar has over 12 years experience of training in Mixed Martial Arts. He has competed worldwide in a variety of arts including Judo, BJJ, Pankration, MMA, in countries such as Ukraine, Russia, Croatia, USA.

Coach Nazar’s Martial Arts accomplishments include:

2010 – Open Europe Championship of Pankration – Silver Medalist
2013 – Amateur MMA Champion of Ukraine
2013 – International Grappling Championship – Silver Medalist
2014 – Ukraine Grappling Championship – Silver Medalist
2014 – World Pankration – Gold Medalist

Coach Nazar loves working with students of all ages and personalizing training regimens based on needs and goals. We hope you get to meet him!

Coach Elissa David

Women's Fitness Kickboxing Instructor

Coach Elissa has been training in Muay Thai for 3 years at Pentagon MMA.  During the day, she teaches English, History, Film, and Philosophy at a local high school.  She also loves to read, play soccer, listen to kpop, and enjoy the outdoors whenever she can.

Luis Henriquez

Print and Digital Media Specialist

A Washington D.C native, Luis has been working in the Visual Arts industry for nearly a decade. His favorite photo of all time is the famous shot of a victorious Muhammad Ali standing over Sonny Liston in 1965. Luis believes that the Martial Arts community is a hotbed for captivating moments such as this. At Pentagon MMA, Luis aims to document as well as help share the inspirational stories told in our gym in addition to capturing all the memories that we will make on our Martial Arts journey. When the camera is off, Luis is out trying to connect local visual artists and create opportunities for them to hone their skills as well as learn from one another. He also likes to go on long hikes, find the best pizza in DC, watch classic movies, and now he’s a regular face in Muay Thai!

Oliva Maharjan

Front Desk Associate

Oliva hails from Nepal and has been training in powerlifting for over 3 years. She has competed in Nepal and is one of the first women to squat 125 kgs in Nepal in her weight class. She is a big fan of squats and loves to promote women in powerlifting whenever she can. Breaking barriers, meeting new students, and working with children make her happy. Be sure to say hi when you see her at the front desk or taking Cage Fitness classes, her favorite at Pentagon MMA.

Jay Donelson

Jiu Jitsu Instructor

Professor Jay began training Brazilian Jiu Jitsu in 2006 under Master Leo Dalla. He quickly became hooked on the art and was soon training almost daily and competing when possible. Jay has competed in many local and international-level tournaments, including the Pan and World Masters, and eventually rose through the ranks to earn his black belt from Master Dalla in 2016. He is known for being technically proficient with his techniques, especially with the half-guard and deep half-guard. Jay is also recognized for his teaching ability, having taught for many years at local area BJJ schools.

Coach Ed B.

Jiu Jitsu Instructor

Coach Ed is originally from the island of Guam and currently lives in Arlington. He has served in the military for over 23 years. Ed has been studying various martial arts for approximately 27 years, including Chinese Kempo, Muay Thai, Army Combatives, Marine Corps Martial Arts, and Brazilian Jiu Jitsu. He has been training in Brazilian Jiu Jitsu for approximately 7 years, receiving his blue belt from Kelly Grissom of Koa Martial Arts, and his purple belt from Alexandre “Soca” Freitas of Soca BJJ. Ed has been training at Pentagon MMA for over 2 years. He enjoys coaching the Tuesday, Thursday, and Sunday morning classes, as well as the Women’s Open Mat on Sundays.

Sujina Maharjan

Youth Programs Assistant

Miss Sujina hails from the Land of Mount Everest, Nepal. She has an Associates Degree in Business from Jana Maitri College in Nepal. She loves working with children and teaching them Nepali words. In her free time, she loves watching movies and traveling.