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United World Muay Thai Association

Khru Bill Petros

Train Hard

And Remember

Muay Thai Fighters Respect all but Fear None

About Us

United World Muay Thai Association was formed in 1993 by Khru Vut kamnark
who saw the need for a better governing body over Muay Thai fighting regulations
in Thailand and the United States. The United World Muay Thai Association
Promote sanctioned fights worldwide ! We are a non profit organization
dedicated to the Study and Enlightenment of Muay Thai - Muay Boran Martial Arts
and All Martial Artist's World wide. Thank you for your interest.

United World Muay Thai Association | | Alphomega Sounds inc Subsidiary

Muay Thai / Muay Boran


About Muay Thai Techniques and

The martial arts of Muay Thai 



Honored Member Khru Petros

United World Muay Thai Association
- Chief Of Staff

Contact Khru Bill




Bill got his start in Martial arts at age 8 when he studied for six years at Bob Ozman Studios in the Valley (North Hollywood / Van Nuys area) There he received his first Black Belt in Ozman Ryu Karate, in which he excelled in style and advancement.

Studied TaeKwonDo under instructor Bob Karch for 4 years

After High School Bill studied Police sciences in Hollywood Valley College in California Spending 2 years there, then enrolled in Rio Hondo College – Public Safety Division Police academy in Los Angeles County California and graduated the academy the next year.

Trained at Jets Gym on Lankershim Blvd in North Hollywood California, and studied under (Benny Urquidez). Bill had gone to the same High school as his sister Lilly.

Started studying under the Master Frank Dux with which his older Brothers Pro Fighter(Glenn Gonzales) and Pro Fighter Bobby Inkman    (Bob Anderson) They had both been training with Master Dux for some time. He studying Dux Ryu Ninjitsu over the next 3- 1/2 years, and received a brown belt from Frank Dux school in North Hollywood, California, in 1988.

He moved to Seattle, Washington, and continuing his prudent studying of Martial Arts at North Seattle's KUNG FU CLUB. 
He continuing training for 4 years in the Seattle area.

Bill Moved back to The San Fernando Valley - In Los Angeles County
In 1993-1994 attended seminars of Master Khru Vut in Los Angeles, California, and had his first taste of Muay Thai Martial Arts.
Bill continued his Muay Thai training, working with Muay Thai Instructors in the Los Angeles area over the next few years until he returned
to Seattle in 1996.

In Seattle, Bill trained with Force Recon Marine Doyle Johnson ( 2 time Golden Gloves Boxer )  Until his passing in 2004.

Houston, Texas
Bill joined the NRA and became certified instructor in advanced sidearm techniques and law Enforcement Defensive Tactics. 
He soon started teaching CQB to local Law Enforcement and Private Contractors assigned to the State Department with ties to local Government.

He started studying Shaolin Kempo with United Studios of Self-defense in Sugar land Texas. Having 4 years Hung Gar Kuen- Kung Fu; He decided it would be a step in the right direction.  He studied there until receiving his 4th Belt in Martial Arts and 2nd Black Belt.

After leaving USSD, he was introduced to fighter Robert Ezell and started training under Army Sergeant Calvin Bradford at Bradford Combat Academy, where he studied for over 1080 formal hours in Muay Thai and Brazilian Jujitsu becoming 12th Khan and receiving his Instructors certificate in Advanced Muay Thai techniques.

He Joined the United World Muay Thai Association becoming a certified instructor. He spent the next six years teaching law enforcement and private military contractors’ defensive tactics. Muay Thai had given him the edge in teaching Law Enforcement and making him an high demand instructor in the Houston area.

Studied kook sool won

Bill is now on Staff for the United World Muay Thai Association and co-founder of the Black Belt Association and the first global Belt Database and Ranking database on BLACKBELTASSOCIATION.ORG.
Also Studying Krav Mega; He became certified weapons instructor in Escrima, kali, and Nun chucks weapons with Bradford Combat Academy under SGT Calvin Bradford. Master Bradford is a 10th Degree in Isshin-ryū Karate; And under his teaching in 2012 Bill received his 1st Degree Black in this Art.

Promoted to Senior Khru 13th khan with The United World Muay Thai Association

Brown Belt Krav Mega

He has been teaching, civilian, Law enforcement, and military personnel  Close Quarter Battle and Defensive Tactics than 11 years.
Law Enforcement / Public Safety officer Instructor Private Military and Corporate Security Instructor

He continues teaching civilian, Law Enforcement, and Private Security professionals, and soon after 20-years teaching Muay Thai, he can be eligible for promotion to the Rank of Ajahn / Aajaan (Professor) 

At 58 years old, Bill now holds belts in more than 10 different styles and disciplines, of which 6 are Black belt or higher in Rank; And 50 years since Bill first started his journey into the Martial Arts.

With over 40 years of on-hands training and an estimated  6,760 total MAT hours. That's a impressive amount of tools in the in the defense basket.

1. Ozman Ryu Karate - 1st Degree Black
2. Kenpo Karate - 1 Degree Black
3. Dux Ryu ninjitsu - 2nd Degree Brown
4. Hung Gar Kuen- Kung Fu - 1st Degree Black
5. Isshin-ryū Karate - 2nd Degree Black
6. Shaolin Kempo - 1st Degree Black
7. Krav Maga - Brown
8. Kuk Sool Wan - Red
9. Brazilian jujitsu - Purple
10. Muay Thai - 13th Khan
11.TaeKwonDo - HWA - RANG - Red Belt


Back In The Day





MMA Magazine Article

Bradford Combat Academy

Blue Tiger

Houston, Texas

Bill Petros

Houston, Texas



141 East 55th st,
New York, NY 10022


Houston, Texas
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