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Crossfit Fortify

Functional Fitness that Produces Real Results

Jonathan Kirk

Owner/Head Coach

Jonathan co-founded CrossFit Fortify in November 2010. He has been training individuals and groups for over a decade, and he continues to provide the Brazosport area with the highest standard of physical training. He currently holds the prestigious CrossFit Level 3 Trainer certification, passing the grueling exam in December 2018, at just 29 years old. This puts him in an elite 1% category of all CrossFit trainers in the world. He currently lives in Lake Jackson, Texas, with his wife Brigitte, and three children, Connor, Mackenzie, and Callan.

Leandra Kaye Warren

Coach

Leandra has her CrossFit Level 1 Certification and has been coaching since June 2018. She has been training in the CrossFit style since 2017. No other training styles have given her results like CrossFit. Having enjoyed running since high school, she has completed 3 half-marathons and is always looking for local races to sign up for. Leandra has attended both the gymnastics and aerobic capacity seminars and is always looking for ways to further her knowledge. She enjoys helping others push past their perceived boundaries, fostering a strong community atmosphere and seeing people achieve their goals.

Leandra holds a Bachelors Degree in Chemical Engineering from the Texas A&M University.

Kasey Crabtree

Coach

Kasey started CrossFit in 2015 after graduating from Texas A&M University. He quickly became hooked with the functional fitness mentality that is CrossFit. Kasey has a passion for helping others achieve their personal goals and decided to start coaching in 2017.

When Kasey isn't coaching, he works full-time as a Project Manager for an industrial construction company. He is also the owner of Brazos River Retrievers where he enjoys training different breeds of hunting dogs. Kasey is an avid outdoorsman and waterfowl hunter.

Kasey was born and raised in Lake Jackson, Texas, and currently lives here with his wife, Sydney and their two black labs, Duke and Reign. Together, they look forward to welcoming their first child in August of 2020. 

Mareille Rolon

Coach

Mareille is no stranger to an active lifestyle. Growing up, she spent countless nights training as a competitive gymnast. Her first job was coaching younger children at the gymnastics gym she trained at. In high school, she was a member of the varsity cheerleading and track teams, and was a member of the dance team and marching band. She enjoyed the variety in her extracurricular activities. 

Mareille continued cheering and dancing after high school at Florida Gulf Coast University. While in grad school, Mareille had a hard time staying motivated at the globo gym and had the itch for something more. In 2012, she found a sport that combined her passion of gymnastics with cardio and weightlifting. CrossFit became more than just a strength and conditioning program, it became a way of life. It also presented an opportunity to share her passions with others and help them achieve their goals. 

In 2014, Mareille began coaching CrossFit and is now a Level 2 CrossFit Trainer. She has also competed in over 20 fitness competitions and was an athlete on a semi pro fitness team. 

Sean Robertson

Coach

Sean has been living a fitness lifestyle since the 1980’s where his family had the only gym in town – “Robertson’s Gym”. In 2018, Sean earned his CrossFit Level 1 Certification and has previously gained military fitness certifications throughout his 23 years of service in the Marine Corps. His career culminated with programming and leading the fitness of 250 Marine and Navy officers, including candidates for special forces. Sean retired from the Marine Corps in 2013, and his military highlights include commanding 200 Marines in a combat zone, teaching 2000 mid-level Marine officers to prosecute war, working on defense projects like the F-35 aircraft, the first unmanned helicopter to go to Afghanistan, and pioneering weapons and tactics for Marine Corps Special Operations Capable Mobile Control Teams. 

Subsequently, Sean earned a Master’s degree in Leadership, worked at a Fortune 150 financial company until taking an early retirement, and is now settled in South Texas where he serves the community in a variety of volunteering roles. To know Sean, is to know he adores his lovely wife – Christine – and the two of them see CrossFit as both fitness and marriage time. Sean and Christine are exceptionally proud of their two daughters, son-in-law, and grandchild. Sean is passionate about CrossFit because he has seen the changes in fitness over the decades, and Sean will tell you that nothing else gives you holistic fitness like CrossFit. Sean is passionate about encouraging fitness seekers of all ages and levels to become the best athlete that they can be. 
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