Victor PetrovLead Developer
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1971
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.
1977
Studied TaeKwonDo under instructor Bob Karch for 4 years
1981
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.
1982
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.
1984
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.
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.
1992
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.
1996
In Seattle, Bill trained with Force Recon Marine Doyle Johnson ( 2 time Golden Gloves Boxer ) Until his passing in 2004.
2005
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.
2006
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.
2007
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.
2009
Studied kook sool won
2011
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.
2015
Promoted to Senior Khru 13th khan with The United World Muay Thai Association
2016
Brown Belt Krav Mega
2018
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
2020
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)
2021
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 10,462 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
William Petropulos is a retired law enforcement instructor with more than a decade of experience training law enforcement professionals in defensive tactics and officer safety.
Beginning in 2011, he served as an instructor with the Texas Sheriffs’ Association, specializing in defensive tactics, knife defense, grappling, and practical close-quarters techniques.
Throughout his career, William provided hands-on training to officers and deputies from agencies across Texas, including the Sugar Land Police Department and Fort Bend County Sheriff’s Office. His instruction emphasized practical, real-world techniques designed to improve officer safety, control, and effectiveness in high-risk encounters.
William Petropulos has been teaching LadySafe™ women’s personal safety and self-defense programs since 2008. His instruction focuses on giving women practical skills, knowledge, and confidence to recognize, avoid, and respond to potentially dangerous situations.
LadySafe™ classes address a broad range of personal-safety topics, including situational awareness, threat recognition, boundary setting, de-escalation, escape and evasion, striking and defensive techniques, releases from grabs and holds, ground defense, and practical responses to common forms of assault. Training emphasizes techniques that can be used under stress and does not depend on a participant’s size, strength, or previous martial arts experience.
Beyond physical self-defense, William’s LadySafe™ instruction emphasizes prevention—helping participants recognize warning signs, make informed safety decisions, develop stronger awareness habits, and understand how criminals may select and approach potential victims. Classes incorporate realistic scenarios and hands-on training designed to help participants respond decisively when avoidance or de-escalation is no longer possible.
From 2008 to the present, William has remained committed to the LadySafe™ program’s central purpose: providing women with practical, realistic personal-safety education that can be applied in everyday life.
William Petropulos
United World Muay Thai Association:
Phone: 212-935-4441
Email:
bill@uwmta.org
Personal Email: williampetropoulos@yahoo.com
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