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meet the team

Please check our trainers' availability with the front desk, (310) 457-2450.

Owner, Trainer

Diamond is the owner of DMG as well as one of its professional trainers. A GOAT in the game, Diamond has been at the top of his field training celebrities and professional athletes for over 20 years. His personality and infectious smiles make his gym an experience that could only be classified as positive and personable.


He takes great pride in helping each member, and always has time to answer questions to improve your workout experience and health journey.

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gary liss

Gary has worked as a trainer in Malibu for 30+ years, garnering a loyal clientele list as well as becoming a local fitness legend and staple to DMG.


Come to the gym any day and you will find Gary helping someone through a workout or getting a good sweat in himself.

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corey west

Corey is a trainer at DMG who adds value to his clients by sharing his in-depth knowledge about getting in shape and building muscle.

In addition to his success with physical training, Corey has years of experience helping those who find themselves undergoing mental transformations alongside their physical ones.


diana nicholson
Pilates Instructor, Reformer Style

Diana is a professional Pilates instructor with over 20 years of experience in Malibu and nationwide.


Her precise and concentrated program will navigate you through a varied repertoire of biomechanically correct exercises. It offers deep core strengthening, pays special attention to your weak links and strengthens the muscles around all movable joints. 

Diana is currently available for 1:1 private sessions in our studio space here at DMG. To book an appointment,

click here.

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oscar and blanca
Custodial Team

Oscar and Blanca are the irreplaceable team responsible for our exceptionally kept gym! They would like to thank Diamond for always being a great man with a big heart, and thank everyone at DMG for being welcoming and kind, especially since our reopening.


 Bendiciones a todos!

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