Our Team

At Stronghold we prioritise a direct line of communication between the students, owners, and coaches. All of our owners are fellow martial artists and have been training together for many years. They can regularly be seen training together with our students in class. This helps the students have a direct line of communication between the owners and instructors. Our classes are taught by a husband and wife, and the kids and spouses of our team train in classes frequently.

Stronghold Coaches

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With world Champions Kade and Tye Ruotolo

with UFC and ONE champion Demetrius 'Mighty Mouse' Johnson.jpg

Lukas Leasure

Founder and Head Coach

Former International school teacher in Singapore
20 years of Martial Arts Experience including: Brazilian Jiu Jitsu, Wrestling, Boxing, and Muay Thai
Pro MMA since 2011.
1st degree BJJ Black Belt
Judge for ONE Championship

Luke embarked on his martial arts journey 20 years ago in America. For the past ten years, he has been teaching in schools and martial arts academies across Asia. With a background in Amateur Wrestling, Brazilian Jiu Jitsu, Kickboxing, Muay Thai, and MMA, Luke brings extensive competition experience to his teaching. He has fought professionally in MMA, competed in amateur wrestling and BJJ competitions, and served as a judge and referee from the local level to World Championship level.

Luke’s coaching experience spans from local kids' competitions to training professional fighters for ONE Championship. As a regular judge for ONE Championship, he has officiated world championship fights featuring renowned fighters such as Demetrius Johnson, Christian Lee, and Angela Lee.

Luke’s career has seen him train, study, and travel extensively while teaching martial arts and secondary school subjects. He taught at Chinese and Korean international schools for three years before becoming a full-time martial arts instructor. Since then, he has taught in Singapore, Malaysia, and Thailand combining his martial arts expertise and educational experience to develop a training program focused on solid fundamentals, technical proficiency, and a positive environment for student growth.

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Charmaine Lim Leasure

Founder | Manager | Kids Instructor | Assistant Instructor

Brazilian Jiu Jitsu Brown Belt
Experienced Kids BJJ and MMA coach
Gym manager
ADCC Singapore | Pro division - Bronze (2022)
ADCC Singapore | Gold (blue belt 2018)
Copa de Borneo | Gold (Blue Belt 2018)

Charmaine Lim Leasure is a highly skilled martial artist, dedicated gym manager, and influential coach. With a passion for Brazilian Jiu Jitsu, she holds a Brown Belt and excels in teaching children's programs.

With over 8 years of experience in boxing, Muay Thai, MMA, and both gi and no-gi Jiu Jitsu, Charmaine brings a wealth of knowledge to her role. She has successfully coached and mentored students in Singapore and Kuala Lumpur, Malaysia, consistently delivering high-quality training.

As our top female trainer, Charmaine plays a pivotal role in empowering and guiding female practitioners. Her commitment to excellence is evident in her competition achievements, including a Gold Medal at the Copa De Borneo as a Blue Belt and a Gold Medal in her division and a Silver Medal in the Open Weight Category at the ADCC Singapore trials. She has consistently medaled at various belt levels, most recently earning a bronze in the ADCC Singapore Pro division.

Charmaine's expertise, leadership, and dedication make her an invaluable asset to Stronghold. Her tireless efforts in managing the gym, coaching children, and fostering a supportive training environment contribute to the success and growth of the academy.

She is an active competitor in Brazilian Jiu-Jitsu and has won Gold as a Blue Belt at the Copa De Borneo as well as the ADCC Singapore trials - where she attained a Gold Medal in her division and a Silver Medal in the Open Weight Category. She has medaled at every belt including silver in the purple belt division at the SGBJJO tournament and recently got a bronze in ADCC Singapore Pro division.

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Darius Zawadzki

Instructor | BJJ | Kids BJJ & MMA
1st Degree BJJ Black Belt

Darius Zawadzki is a Polish Born BJJ black belt from evolve MMA. Now a Singapore Citizen, Darius has over 20 years of martial arts experience including Muay Thai, Boxing, and BJJ.

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Wesley Teh

BJJ Purple Belt
Assistant Instructor, Director Kids program

Wesley in the director of our kids program, a BJJ competitor and formerly an accountant. He's very popular with the Stronghold kids and parents due to his a patience and enthusiasm. He's also an avid competitor having competed in both Gi and no Gi BJJ in Singapore and overseas.

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Ron Ng

instructor (Muay Thai & MMA)

Undefeated in Amateur Muay Thai and MMA
Inaugural SFC Lightweight Champion (MMA)
BJJ Brown Belt

Ron is a lifelong martial artist and has trained in many disciplines over the year including boxing, muay thai, bjj, MMA, and some other traditional martial arts. Ron currently teaches Muay Thai on Saturday morning and Monday night.