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Meet Our Fabulous Gymnastics Coaches

Our Coachs

All our staff are fully vaccinated, have passed their NSW working with children check and hold  current first aid qualifications.

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TAMZIN MC SWEENEY

Owner & Programme Director 

Tamzin is the founder and programme director and is extremely passionate about child development through gymnastics. She relocated to Sydney with a vision to build the sport of gymnastics and improve young children's movement vocabulary through basic gymnastic skills. She is a qualified International Women's Artistic Gymnastics coach (FIG level 1) and holds an Advanced Coaching Accreditation through Gymnastics Australia.

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KRISTINA KNAGGS

Team Leader

A proud Newtown local and mother of two, Kristina has been leading our team at Gymkidz since January 2022. A former competitive gymnast in England, she then deepened her understanding of child development as a Primary School Teaching Assistant. Kristina brings a diverse background to her role as our team leader and is passionate about harnessing the power of gymnastics to enrich children’s lives both in and out of the gym. She loves fostering a supportive environment for our coaches and strengthening the local Gymkidz community.

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CAITLIN SO

 Senior Recreation & Kindergym Coach 

For the past three years, Caitlin has been an integral part of the Gymkidz family, bringing her boundless energy and expertise to every class. With a lifelong passion for sports and movement, she has competed in hockey, karate, and basketball—and channeled that love into coaching primary and high school hockey teams and now gymnastics!

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Dedicated to her role as a coach, Caitlin’s mission is to create a fun, supportive space where children can build skills, confidence, and lasting memories. Outside of Gymkidz, she’s pursuing a Bachelor of Social Work at UNSW, driven by a desire to support children and vulnerable communities in meaningful ways.

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Maria Argyrous

 Senior Recreation & Kindergym Coach 

Maria is passionate about working with children and has devoted over three years to coaching gymnastics. Her aim is to empower children, helping them take pride in their progress and hard work. Maria creates a supportive environment where her gymnasts feel resilient and capable. Alongside her coaching, she is currently pursuing a Bachelor of Early Childhood Education at the University of Sydney.

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KYAH HUMPHRIES

 Senior Recreation & Kindergym Coach 

Kyah joined Gymkidz in February 2022 and, over the past three years, has become a vital part of our coaching team. A former competitive gymnast, she holds the WAG Intermediate coaching accreditation from Gymnastics Australia and spent more than three years instructing at Springloaded in Coffs Harbour before relocating to Newtown.

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Currently completing a degree in Exercise Physiology at the University of Sydney, Kyah combines her academic knowledge with hands-on expertise to design sessions that help every child progress and gain confidence. Her goal is simple: to guide students toward their personal best while fostering a positive, encouraging environment.

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MAJA BJÖRNSSON

Recreation & Kindergym Coach 

Maja is a dedicated gymnast and gymnastics coach from Sweden, with 15 years of experience in the sport. For the past 5 years, she has specialized in coaching Women's Artistic Gymnastics. In addition to her coaching expertise, she has also worked at a preschool, where she is committed to fostering children's development through physical activity and social interaction. Maja relocated to Australia in early 2025 to further enhance her skills and broaden her experience as a gymnastics coach in a new environment.

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CHARLOTTE ARZADON

Recreation & Kindergym Coach 

Charlotte has a genuine passion for working with children, drawing on her experience in both babysitting and gymnastics coaching. She is dedicated to helping each child discover their own strength, confidence, and joy through movement. With a focus on creating a positive and supportive environment, Charlotte encourages kids to challenge themselves, grow at their own pace, and celebrate their achievements—free from everyday pressures. She is currently studying psychology at UNSW, deepening her understanding of child development and emotional well-being.

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Natalie Heaydon

Recreation & Kindergym Coach 

Originally from New York City,  Natalie has been passionate about gymnastics since she was just 3 years old. She competed up to Level 6, building a strong foundation in the sport she loves. With years of experience working with children through babysitting and coaching, Natalie is known for her warm, encouraging approach. She’s dedicated to helping every child build confidence, skills, and a lifelong love of movement.

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ADJANI ZAHRA (AJ) AFIEF

Recreation & Kindergym Coach 

AJ's passion for sports and coaching runs deep. Prior to relocating to Sydney, she actively engaged in social work and coaching for Jakarta's local children, alongside competitive participation in volleyball and youth gymnastics for South Jakarta. Presently, she is pursuing a Bachelor of Arts at the University of Sydney, supported by an Elite Athlete Program Scholarship, as she represents NSW Volleyball.

We're always on the lookout for amazing coaching talent. Enquire about our Casual and Part-time roles available in 2022

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Send Us Your Resume

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