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Our Coaches are experts in their respective martial arts and are here to help you achieve your goals.

a photo of robert drysdale staring into the camera with his arms crossed

Robert Drysdale

Head Coach

Robert Lewis Drysdale is an American Brazilian Jiu-Jitsu 4th degree black belt under Léo Vieira, a retired mixed martial artist.

a photo of marcelo nunes staring into the camera with his arms on his belt

Marcelo Nunes


Marcelo is the Brazilian Jiu Jitsu Coach for the advanced night classes. Monday, Tuesday, Wednesday and Thursday at 6:30.

Allan Antoniewicz

Judo Coach

Superstrong former athlete with numerous fitness and health awards with 7 published books on Crossfit lifestyle.

a photo of sonny sebastian staring into the camera with his arms on his belt

Sonny Sebastian

BJJ Coach

Originally from the Philippines, Sonny Sebastian is one of Robert Drysdale’s oldest students in the United States. He began training in 2010 and has since earned all his belts under Drysdale. Six of Sonny’s ten years training Brazilian Jiu Jitsu have been spent as a Coach.

a photo of ken hahn staring into the camera with his arms on his belt

Ken Hahn


Ken began his Brazilian Jiu Jitsu journey back in 2007, initially training exclusively without the gi however after finding a new mentor in Robert Drysdale in 2011, Ken expanded his BJJ and Martial Arts capabilities and is now the Head Striking Coach at Zenith.

Shawn Johnson

Striking and Wrestling Coach

Shawn started training No-Gi Jiu-Jitsu at age 15. Shawn joined Zenith 10 years ago and has become 2015 IBJJF Pan American runner up, multiple 1st place NAGA Grappling light feather and feather weight champion, and 2019 NAGA Expert Division Light Featherweight Champion.

Lehua Sodaria


Bio Coming Soon.

Shayna McCallum

Judo Coach

Bio Coming Soon.

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(702) 258-0048

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