Meet the CrossFit Coaches

Passionate Coaches

CrossFit Shady Grove simply has the best, most exciting group of coaches in Gaithersburg! They’re not only incredibly talented and experienced, these folks are also a blast to hang out with. If you’re ready to break and sweat and crack a smile (or a big belly laugh), come on it and WOD with us!

  • Justin McCary

    Co-Owner and Head Coach

    Co-Owner and Head Coach Justin McCary is an absolute Batman fanatic. He’s been collecting Batman memorabilia for years and even creates sculptures like masks and props. “Halloween is the best holiday ever,” he says.

    The enthusiasm Justin has for the Caped Crusader is nothing compared to the passion he has for his coaching clients. “It’s absolutely incredible seeing others get excited about hitting a PR, or getting their first pull-up or muscle-up,” he says. “It’s infectious, and motivating for me as a coach, and only drives me to better myself both as a coach and an athlete.



    • NASM-PES
    • FMS-1
    • USAW-Sports Performance Coach
    • CrossFit - Movement & Mobility
  • Garrett Bergman


    Coach Garrett Bergman has always wanted to help people achieve their full potential. After watching the CrossFit Games on TV in 2012, he knew he wanted to trade in his usual bodybuilding regimen for CrossFit. “After I went through my basics course and jumped into my 1st class, I was hooked and never looked back,” he says.

    Garrett’s interesting background in acting, playing baseball and his collegiate ice hockey career at the University of Maryland are always topics of conversation around the gym. Today, Garrett is passionate about helping his members reach their goals, and he specializes in muscle gain, fat loss and endurance.



    • CrossFit Level 1
    • CPR/AED
    • TRX: Individual and Group
    • Kettlebell
  • Matt Harbison


    Coach Matt Harbison started CrossFit as part of his full-time job in law enforcement. “We utilize it almost daily in our training,” he says.

    Matt specializes in defensive tactics, and he’s passionate about Brazilian Jiu Jitsu and mixed martial arts. He has “a handful of medals that sit in a box in my basement” from his wrestling and Jiu Jitsu competitions and is focused on only getting better with age.


    • CrossFit Level 1
  • Lindsay Warnes Harbison

    General Manager and Co-Owner

    General Manager and Co-Owner Lindsay Warnes Harbison has been playing sports all her life, and CrossFit was a natural progression of her competitive spirit as an adult. When she first started coaching five years ago, she says she was afraid to speak in front of her peers, “But once I got comfortable, I really started enjoying it.”

    When she’s not at the gym, you’ll find Lindsay running her estate planning law practice. Her favorite quote is from Henry Rollins: “The Iron never lies to you … It never freaks out on me, never runs. Friends may come and go. But 200 pounds is always 200 pounds.”



    • CrossFit Level 1
    • CrossFit Movement & Mobility
    • Brand X Method Basic Kids Course
  • Lauren McCary

    Assistant Manager

    Assistant Manager Lauren McCary wants to share her love of fitness with as many people as possible. “Helping people live a healthier, more fulfilled life is the best job there is,” she says.

    Lauren first tried CrossFit at the urging of her friends. “I fell immediately in love with everything about it,” she says. “When I realized that I couldn’t deal with the monotony of my 9-5 job, I committed myself to helping this gym succeed, and using the skills I have to make it great.”


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