About Us

Core Values

  1. Teach and produce great jiu jitsu
  2. Have as much fun as possible doing it
  3. Leave your troubles at the door and train
  4. Commitment to excellence in all you do.

Brenton Fitzgerald

Owner and Head Instructor, Black Belt, Ironman

Brenton has been practicing Brazilian Jiu Jitsu since 2002. Before that he was an accomplished wrestler starting at the young age of 9, in 1986. He started under Professor Henry Matamoros and earned the rank of brown belt under Professor Matamoros.

After over 5 years at the rank of brown belt, on May 17th 2015, Professor Matamoros instructor Master Pedro Sauer promoted Brenton to Black Belt. Master Sauer received his Black Belt from Grand Master Helio Gracie who is considered to be the founder of Brazilian Jiu Jitsu.

That means Brenton is 2 degrees of separation from the foundation of the art. He has trained with Professor Jon Freidland (also a Master Sauer Black Belt) at Neutral Ground for the past years and is excited to carry on the tradition of great Jiu Jitsu under the banner of Fluid Jiu Jitsu.

My Story

I was a very good wrestler. At age 24 and my career behind me, I challenged anyone and everyone to wrestling matches. My sister was dating a man named Mike Contreras. He accepted my offer. I took him down, I held him on his back for 3-4 minutes. This was well more than enough to win a wrestling match, it did not win the fight. I could not make him quit. After a few minutes I got tired and Mike effortlessly lifted me off of him (he was 20lbs lighter than me) and turned me 90 degrees in mid air, set me down very gently and applied an arm bar. I had to tap out and give up so he would not break my arm. I asked how he did that and he said Brazilian Jiu Jitsu! I had been a wrestler for 15 years, Mike had been in Jiu Jitsu for 2 years and never wrestled before.

I found Professor Henry Matamoros 2 weeks later and have not stopped training since. I never wanted to be beaten that bad ever again. I have been beaten since. That is part of being humbled by this art, but I also want to show the average person how to beat a good wrestler with great technique just like I was beaten.

Mike Caughey

Brazilian Jiu Jitsu Instructor, Brown Belt

Mike has been involved with jiujitsu since 2008. He holds the rank of brown belt in both Brazilian JiuJitsu and Judo.  His passion is to coach and guide others to be the best they can at the gentle art.

Jason Lippert

Brazilian Jiu Jitsu Instructor, Purple Belt

Jiu Jitsu start date: c. 1996. Founder, and inaugural President, Secretary and Treasurer of the UW-Oshkosh Brazilian Jiu Jitsu Club (UWO BJJC). Original members included Prof. Henry “The Don” Matamoros and Prof. Benjamin Salas; when they were white belts. Jason is taking the long path to his black belt. Along the way, he has accumulated experience in Tae Kwon Do & Hapkido, Judo, Kali/Escrima, and kickboxing. At one time or another, he has competed in everything (except kickboxing), though his focus has always been on effective, practical, self-defense rather than sport-specific techniques.

In January 2017, after an almost 10-year break (separated ribs, life, inertia), Jason was excited to find that Prof. Brenton Fitzgerald had opened Fluid. Having met when they were both blue belts training under Prof. Matamoros, Jason appreciated (then) Brenton’s dedication to technique and the school’s principles. Fluid is a special place. Jason is proud to be part of it. Jason is a public school teacher entering his 20th year and has coached for small clubs and Jiu Jitsu schools off and on over the years. This combined experience grants him a good understanding of what to teach, when.

Jeff Taylor

Muay Thai Kickboxing Instructor

Jeff has trained in Muay Thai for the past 10 years. He has trained and fought professional Muay Thai in Thailand for many years. He has trained with top name fighters, gyms, and trainers throughout Thailand. Jeff continues traveling to Thailand and working with other trainers around the world to continue his knowledge and love of the art.

My Story

I train mostly out of Hongtong Muay Thai in Chiang Mai, Thailand under Kru Joe and Gen these days. I have worked with the twins for the past 6 yrs. They have become family to me more than friends. Joe and Gen both have two different styles of Muay Thai. I have always been more the kicker style fighter (Muay Tae) . I enjoy training all the different styles and introducing them to my students these days. We all have different body responses to the different styles of Muay Thai.  My latest style I have been working on is the Dutch Muay Thai style. This style incorporates the heavy boxing pressure/ volume game mixed with traditional Thai boxing. The art of Muay Thai has forever changed my life for the better. I enjoy sharing  the knowledge and culture of the Thai people.

Peter Kulibert

Kickboxing Instructor

Peter has been training in Taekwondo and Karate since 2007 and holds a black belt in both. He has also trained in Muay Thai since 2013. Peter has been teaching striking techniques and strategies for about 8 years. He also has competition experience in kickboxing, and was the Milwaukee Rumble 2016 champion.

I started training in Karate and Taekwondo my freshman year of college. I had been attacked and bullied a few times throughout my childhood so I wanted to know how to protect myself. The martial arts club at my school wasn’t for profit, so the training was the number one priority. Our motto was “indomitable spirit” and our testing reflected that. To earn my black belt, I had to survive a thirteen-hour test that was designed to break my body down and show how much heart I have. I have aspirations of fighting mma professionally, but my bigger passion is coaching. Since “iron sharpens iron” I intend to improve myself as I improve my training partners.

Miguel Monterrey

Kids Instructor, Blue Belt

Miguel has been a lifelong athlete, competing since the age of 11 years old in a wide range of team and individual sports including wrestling, track, swimming, American football and overall physical fitness competitions.  Throughout high school, Miguel was a key leadership figure in his JROTC battalion, leading the “Raider” physical fitness competition team to local and statewide championships as well as personally receiving the National Army JROTC Physical fitness & leadership award in 2005. In 2013, Miguel began his martial arts journey with his brother (USMC MCMAP Black Belt instructor trainer) in a number of martial skills ranging from weapons & disarmament tactics (knife, Escrima/Arnis, handgun) to hand-to-hand combative skills like Brazilian Jiu Jitsu, Western Boxing and Hapkido.

After entering local kickboxing tournament “The Milwaukee rumble”, Miguel suffered a catastrophic injury in the first round of his first match but went on to win the fight. This injury put him out of commission for an entire year at which time he had to make a difficult choice. “I knew I would never master all these skills, so I picked the one I was the worst at and that was BJJ”.  Miguel has now been under the wing of Professor Brenton Fitzgerald, helping coach the Fluid Jiu Jitsu kids program and simultaneously competing in gi & no gi jiu jitsu tournaments throughout Wisconsin, bringing home multiple gold medals for his Fluid Jiu Jitsu family.