About Us

Agency X was born from a vision to change the way athletes are represented, supported, and connected with brands. What started as a boutique agency has grown into one of Australia’s most recognised athlete management, sports marketing, and talent agencies — trusted by athletes, brands, sporting clubs, and player associations alike.

As the Authorised Oceanic Agent of the Authentic Brands Group, we provide exclusive opportunity to work with some of the world's biggest household names across sports and entertainment.

At Agency X, we’re not just negotiating deals — we’re shaping futures.

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Carlie Green-Medina

Founder & Managing Director

Carlie has spent nearly two decades working at the intersection of sport, marketing, and talent. After 15 years of executive senior management in the casino and entertainment industries, she pivoted into sports, bringing her expertise in partnerships, branding, and commercial strategy to create Agency X in 2017.

Today, Carlie works with some of Australia’s best-known athletes — from Olympians and Paralympians to AFLW and NRL stars — while also being the authorised Oceanic Agent for Authentic Brands Group, representing global icons like Shaquille O’Neal, Elvis Presley, and Marilyn Monroe.

Known for her authenticity, resilience, and strategic creativity, Carlie’s mission is to not only secure opportunities for athletes but also to have a lasting, positive impact on their lives and careers.

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Jake Stein

Player Agent & Talent Executive

Jake’s unique journey gives him rare insight into elite performance. A world-class decathlete, Jake represented Australia on the international stage before switching codes to pursue a professional AFL career with the GWS Giants and Gold Coast Suns.

After years of competing at the highest level in two sports, Jake has transitioned into athlete management, becoming an accredited AFLPA agent. He now leads Agency X’s AFL and AFLW program, supporting athletes with contract negotiations, career development, and commercial opportunities.

Jake’s background as both an athlete and agent allows him to understand firsthand the challenges and opportunities players face, ensuring their careers are managed with empathy, strategy, and vision.

Accredited AFLPA Agent

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2017

AGENCY X IS FOUNDED

We started as a marketing agency for athletes. Wanting to help them grow their brands by providing social media and branding expertise. Little did we know where it was headed...

2018

THE COMMERCIAL ATHLETE LAUNCHES

After speaking to athletes about their branding we realise that there is little education for athletes on how to use their athlete platforms to create commercial opportunities. The Commercial Athlete program is launched.

NEWS

Agency X In The Press

About Us

Carlie Green-Medina

Jake Stein

NEWS

Agency X In The Press

Agency X respectfully acknowledges the Turrbal and Jagera peoples, Traditional Custodians of the land on which we live and work. We pay respects to Elders and community leaders past, present, and emerging and the First Peoples of other communities we have the privilege to work with.

Agency X respectfully acknowledges the Turrbal and Jagera peoples, Traditional Custodians of the land on which we live and work.
We pay respects to Elders and community leaders past, present, and emerging and the First Peoples of other communities we have the privilege to work with.