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About Rebel Coaching Company

Rebel Coaching Co. is run by Matt and Marjolijn Warnock.

Matt is a GB Triathlon L2 qualified coach who has tons of experience coaching individuals, groups and teams. He spent his early years swimming competitively and his 20s working and partying way too hard, before discovering triathlon and endurance sports a decade ago. Since then, he's racked up 5 Ironman finishes, a couple of ultra runs, as well as tons of shorter races.

Marjolijn is a keen runner (and one-time-only triathlete!) who keeps the Rebel Coaching Co gears greased and turning. If you're just about to start with us, Marjolijn will help you get onboarded smoothly.

Rebel Coaching Co specialises in helping real athletes with real lives to achieve their athletic dreams. Whether that's finishing your first sprint triathlon having never trained before, or qualifying for a national age group team or even Kona, we have an unrivalled success rate in helping athletes to identify and achieve their goals.

Have any questions for us?

Drop us an email at and we’ll get back to you within 24 hours.