90770407

BOXING

45 and 60 Minute Classes

Technique and Fitness

Beginner to Fighter

Learn More

MUAYTHAI

Technique and Fitness

Beginner to Fighter

Learn More

BOXING

45 and 60 Minute Classes

Technique and Fitness

Beginner to Fighter

Learn More

MUAYTHAI

Technique and Fitness

Beginner to Fighter

Learn More

Our team of trainers at William Street Gym is comprised of experienced and passionate individuals who have devoted a major part of their lives to their chosen art/sport. Respect for the disciplines they teach ensures that the students at WSG receive quality instruction in a safe and supportive environment.

Sy Nadji

Sy Nadji

Owner, Boxing, Muaythai, Strength and Conditioning

Inspired like many others his age by the movies of Bruce Lee, Sy started his Martial Arts training in Taekwondo at the age of 12. His thirst for knowledge, led him to take a keen interest in the skills of Boxing and Muaythai to supplement his Taekwondo training. Achieving his Black Belt at the age of 16, Sy moved to train in Shootfighting (A blend of Brazilian Jiu Jitsu, Muaythai, Boxing and Wrestling). Appreciating the Wrestling and Striking skills of Shootfighting set him on the search to find more specialised trainers in Wrestling, Muaythai, Boxing and BJJ.

Having been exposed to Strength Training through his High School P.E teacher, Sy went on to study Exercise Science with a major focus on Strength and Conditioning. Although having competed and fought in several different styles, Sy’s passion always lay in coaching and training others. This led him to a career in Personal training and coaching, opening his first facility at the age of 25 (Kaizen Human Performance) which has evolved over the years into the current William Street Gym.

Sy is also the  Promoter of Rebellion Muaythai, widely regarded as Australia’s Premier Muaythai event as well as BOA Super 8, a professional Brazilian Jiujitsu Event. Sy Holds a Bachelor’s Degree in Exercise Science, is a registered trainer with Boxing Victoria, The Professional Boxing and Combat Sports Board, World Muaythai Council as well as being the Muaythai Australia Victorian President.

Jump Chatchai

Jump Chatchai

Muaythai and Boxing

Jump started his Muaythai training at the age of 6 under the guidance of his father who himself was a fighter. His father gave him the nickname “Chatchai” which literally means “The Winner”. At the age of 12, Jump began training at the famous Sangmorakot Gym in Bangkok along side his best friend who is also the son of the Gym’s owner Jartui.

In High School he took up Western Boxing which he quickly excelled at. Later fighting for Bangkok University on a scholarship he won the Thailand University Championships and in 2004 and went on to join the Thai Airforce Army team. Jump started to teach Muaythai and Boxing in Australia in 2006, joining the team at William Street Gym (then known as Kaizen Fitness) before returning to Thailand for a a few years to spend time with his family. During his stay he was invited to Brunei to teach Basic Muaythia Skills to the Police.

Jump returned to Australia in 2014 and quickly returned to William Street Gym to share his passion and knowledge with the WSG Muaythai and Boxing students.

Jared Sabelberg

Jared Sabelberg

Muaythai

For more than a decade, Jared has enjoyed many roles in the world of Muay Thai. Like many, he was initially attracted to Muay Thai due to it’s practicality as a Martial Art and it’s obvious physical and mental demands as a sport.

After several fights on the Melbourne Muay Thai circuit and the occasional fights interstate, he travelled to the homeland of Muay Thai to take his training and fighting to a higher level. Jared chose to stay away from the holiday resort style gyms geared towards tourists and instead headed to Kiatphontip gym in Bangkok.

Jared lived and trained at Kiatphontip gym with the gym’s stable of Thai fighters, learning from and training with some of the top fighters of the time. Whilst in Thailand, Jared fought 15 times, including at some of the main stadiums and also on the Queens Birthday event.

Having now retired from fighting professionally, Jared is enjoying the role of a trainer.

Daniel Hein

Daniel Hein

Brazilian Jiu Jitsu

Gracie Black Belt

13 years experience training BJJ (Brazil and Australia).

Lineage: Mitsuyo Maeda > Carlos Gracie > Helio Gracie > Rickson Gracie > Marcelo Behring > Waldomiro Perez > Roberto Godoi > Paulo Bento

Teaching Experience:

2 years teaching kids and adults in Brazil under Barbosa BJJ and 3 years and 6 months teaching and training in Melbourne, under Gracie Australia (Ground Zero – Head coach Rob Williams) and more recently, under Maromba Academia (head coach Thiago Stefanutti)

Added skills: Judo, Muay-thai, Boxing, Yoga, Nutrition, Fitness

Academy Lineage: Gracie Barra (Raphael Simpson) / Chute Boxe (Flavio Alvaro and Jorge Patino “Macaco”) / Barbosa Jiu Jitsu (Paulo Bento) / Fusion BJJ (Gustavo Buanocorso) / Ground Zero (Rob Williams) / Maromba Academia (Thiago Stefanutti)

Ben White

Ben White

Muaythai, Strength and Conditioning, Kids Muaythai

At a young age, introduced to Goju Karate by his father begun the first step into a lifestyle devoted to martial arts and combat sports. Being a big fan of all fighting styles including the early days of Pride, UFC, K1 and Muay Thai during high school years, Ben decided to try Muay Thai and was instantly hooked.

Well over a decade of experience later in Muay Thai, including 25 fights across Australia and Thailand and furthering his passion for fitness and health, Ben expanded his knowledge by completing a Diploma in Fitness and is currently studying for a Bachelor in Sport and Exercise Science.

Specialising in Strength and Conditioning, Pre/Rehabilitation and Movement personal training and Nutrition, Ben continues to compete and pass on his knowledge and experience as a Trainer at William Street Gym.

Ben is registered with the Victorian Sports Combat Board as both Competitor and Trainer and holds a valid Working with Children Check and Senior Level First Aid.