Meet the Aquatics Team

Stephen Heinze, Aquatics Supervisor

[P] 469.635.5311
[E] Stephen Heinze

Stephen grew up in Florida, where he developed a love for the water, before moving to Texas in 2006. He began his career in aquatics in 2009 as a lifeguard, gaining valuable experience in water safety, team leadership, and emergency response. Over the years, he advanced to the role of Aquatic Assistant Manager for a Texas school district, where he oversaw daily operations, trained staff, and implemented programs to enhance community engagement.

Stephen is passionate about creating safe and enjoyable aquatic environments and takes pride in fostering the professional growth of his team. Outside of work, he enjoys swimming, a lifelong hobby that keeps him connected to his passion for aquatics. He also values spending quality time with friends, exploring the outdoors, and staying active in his local community.

Aquatics Coordinator - Rial Denman

[P] 469.635.5310
[E] Rial Denman

Robert “Rial” Denman was born in Carrollton, Texas and brings an impressive ten years of experience in the aquatics field to his position at Thrive. Rial was a member of his high school’s varsity swim team and began his aquatics career at age 16, first earning his Lifeguard Certification and then his Lifeguard Training Certification shortly afterward.

Rial is passionate about aquatic safety and is dedicated to helping people feel safe and excited around the water. He hopes to expand aquatic programming not only at Thrive, but also at Sun Valley and Lewisville Lake. When he’s not working, you can find Rial enjoying time at the beach or relaxing by the pool with his loved ones.

Nicholas Jacobs, Senior Head Lifeguard

[P] 469.635.5297
[E] Nicholas Jacobs

Meet Nick! Nick worked as a Lifeguard and head lifeguard for six years in The Colony, where he discovered his passion for life guarding. He has now turned that passion into full time work, bringing his experience and love for the water to Thrive as a Head lifeguard. Nick got his lifeguard certification in 2016, adding his LGI in 2022. Nick has lived in Texas his whole life, being born in Plano and growing up in The Colony. Outside of work Nick loves to swim and loves the Dallas Cowboys!

David Martin, Head Lifeguard

[P] 469.635.5297
[E]David Martin

David was born in Sarasota, Florida before his family moved here in 2015. As a lifelong home school learner, David is an advocate for home school programs and would love to work with associations in the community in the future. David is passionate about martial arts and has been practicing for the past 6 years, including teaching for the past two and a half years. David turned his passion for martial arts into motivation for constantly improving himself and looks forward to the next adventure life brings him.

Leivy Garcia, Head Lifeguard

[P] 469.635.5297
[E] Leivy Garcia

Meet Leivy! Leivy grew up around the ocean, learning to swim as a child while her father worked as a fisherman. Her passion for aquatics led her to join the swim team in high school, where her dedication earned her a lifeguard position at 16. A life-changing rescue early in her career solidified her commitment to always being prepared. Now, with seven years of experience, she holds LGI, AFO, and lifeguard/CPR AED certifications. She values mentorship, training, and building strong relationships within the aquatics community. Leivy is excited to bring her expertise to the Thrive team.

Kalie Schroth, Head Lifeguard

[P] 469.635.5297
[E] Kalie Schroth

Kalie has been dedicated to aquatics and water safety since the age of 16. With extensive experience in life guarding, teaching swim lessons, and training new staff, she brings both passion and strong leadership to her role as Head Guard.

Known for her kind heart, spunky attitude, and uplifting presence, Kalie creates an environment where both guests and staff feel welcomed and encouraged. She takes pride in helping others grow-whether it's mentoring a new guard or building a young swimmer's confidence in the water. Her dedication to safety, teamwork, and community shines through in everything she does.

Meet the Fitness & Sports Team

Fitness & Sports Supervisor- Rodrick Mayberry

Meet Rodrick or also known as Rod. Rodrick is originally from San Angelo, Texas, and has been involved in the sports and recreation field since 2016, developing a strong background in athletic programming, leadership, and community engagement. He previously served as the Assistant Recreation Manager for the City of San Angelo, where he helped expand and manage youth and adult sports programs, special events, and summer camps. Rodrick is an active volunteer with the Texas Amateur Athletic Federation (TAAF) and currently serves as the TAAF Adult Flag Football Commissioner. A former collegiate athlete, he played football for Angelo State University for three seasons. He looks forward to applying his experience, energy, and passion for recreation to his new role—creating opportunities that inspire participation, teamwork, and healthy lifestyles.

Cierra Brackens, Fitness Coordinator

Meet Cierra, an Indiana native, who graduated from Ball State University with a bachelors in Exercise Science. She moved down to Texas shortly after where she has been pursuing her love for fitness as a personal trainer! Before joining us at Thrive she taught group exercise classes at a boutique health club as well as ran her own small personal training business.  As the fitness specialist for Thrive, Cierra will use her passion for health and fitness to encourage the patrons of Lewisville to become the best version of themselves!

James Marin, General Programs Coordinator

[P] 469.635.5308
[E] James Marin

Meet James! James graduated from Texas A&M in 1988. He was a High School Teacher and Coach for 29 years. James taught all levels of English, coached Football, Basketball and Baseball and has worked all over the state teaching and coaching. Before starting his teaching career he worked for Colonnade Athletic Club in San Antonio. And in his spare time he likes watching college football and riding his Harley. We are excited to have James on the Thrive team! If you see him around, make sure to say hi!

Meet the Operations Team

Jazmyn Gindratt, Thrive Assistant Manager

[P] 469.635.5309
[E] Jazmyn Gindratt

Meet Jazmyn (or Jazz for short). Jazmyn was born and raised in Abilene, TX and enjoys being outdoors, working out, and playing basketball. She graduated from Texas Wesleyan with a Bachelor's degree in Psychology and continued on to receive her Masters' in Psychology Specialization in Sport Psychology. She was promoted to Assistant Manager in November 2022. Jazmyn comes to us with an abundance of experience in Recreation where she has overseen a wide variety of programming from summer camp to seniors and operations of recreational facilities. Jazmyn is looking forward leading the Thrive team and contributing her knowledge to bring innovative programs, and events for all ages to Thrive.

Darrin Williams, Operations Supervisor

Meet Darrin! Darrin graduated from UNT with a degree in Recreation and Leisure Studies. He joined the Lewisville team in December 2003 as a Recreation Specialist at Frederick P. Herring Recreation Center and was promoted in October 2011 to Center Supervisor for Memorial Park Recreation Center. Darrin is now the Operations Supervisor for Thrive and is responsible for overseeing the customer experience such as memberships, rentals, tot drop, and overall facility operations. If you see him in passing, be sure to say hi or give him a smile and you are sure to get the same greeting in return!

Osanna Nalbandian, Customer Service Specialist

[P] 469.635.5317
[E] Osanna Nalbandian

Meet Osanna, Osanna previously worked in our Thrive Adventure Land and at our front desk but was recently promoted to our Full-Time Customer Service Specialist! Osanna grew up in Greece, and has been living in Lewisville for 21 years. She speaks 5 languages and is also a mother of two, a son and a daughter. Osanna enjoys reading, traveling, spending time with family and friends, and trying different cuisines. She "Thrives at building relationships and helping out my community."

Michael Rogers, Customer Service Associate

[P] 469.635.5300
[E] Michael Rogers

Meet Michael.  Michael grew up in Oklahoma and later moved to Texas during high school, where she developed a strong appreciation for Texas culture and community.  She previously worked at the Frederick P. Herring Recreation Center as a Reservation Clerk, gaining valuable experience in customer support.  Michael is excited about joining the Thrive team and bringing her skills in customer service to this role.  Outside of work, she enjoys relaxing with a good movie, getting lost in a good book, and exploring new places while playing Pokemon Go!.

Michelle Martinez, Customer Service Associate

[P] 469.635.5300
[E] Michelle Martinez

Meet Michelle! Michelle was born in Phoenix, Arizona, and brings more than five years of experience creating exceptional guest experiences, helping others, solving problems, and making every interaction a positive one. She previously worked with us as a part-time team member and has now returned as a full-time member of the Thrive team. Michelle’s diverse professional background includes experience in hospitality, the medical field, and talent acquisition.

She is excited to be back and looks forward to continuing to make a positive impact at Thrive!

When she’s not working, you’ll usually find Michelle spending time with her dog, staying active at the gym, or discovering a new hole-in-the-wall restaurant.

Meet the Programs Team

Dr. Miranda Maloy, CPRP, Programs Supervisor

Born and raised in Cincinnati, Ohio, Miranda relocated to Texas in 2012 and has spent more than a decade creating innovative, inclusive recreation experiences that strengthen community and connection. She holds a Bachelor of Science in Psychology, a Master of Science in Marriage and Family Therapy, and a Doctor of Education in Leadership and Learning in Organizations, bringing a unique perspective on wellness, leadership, and community engagement to her work.

At Thrive, Miranda is passionate about inclusive and adaptive recreation, teen engagement, wellness programming, and large-scale special events. She believes recreation has the power to create belonging and is always looking for creative ways to help people connect, play, and find their place in the community.

An active leader in the parks and recreation profession, Miranda has been recognized as an NRPA 30 Under 30 honoree and recipient of the 2024 NRPA Young Professional Fellowship. Outside of Thrive, she enjoys spending time with her daughter, reading, painting, exploring her community, and inevitably picking up another new hobby.

Kathryn Dye, CPRP, Active Adults Specialist

[P] 469.635.5313
[E] Kathryn Dye

Kathryn Dye has more than seven years of professional experience in recreation and leisure services, serving senior adults through programming, wellness, education, and community engagement. She plans and facilitates programs and services that promote active aging, personal wellness, and community connection. 

Committed to lifelong learning, Kathryn earned her Certified Park and Recreation Professional credential and has pursued additional development in group fitness, interpretation, and lifeguarding. Her professional leadership extends to the Texas Recreation and Park Society's Leisure and Aging Services Branch, where she now serves as Chair after previously serving as Chair-Elect. Kathryn earned an Associate of Science from North Central Texas College and a Bachelor of General Studies in Business and Kinesiology from Texas Woman's University. She is currently pursuing an Executive Master of Public Service and Administration in the Public Management track at Texas A&M University's Bush School of Government and Public Service.

Kathryn coaches youth soccer and serves on her local soccer board, and her volunteer experience includes fundraising with the Leukemia  Lymphoma Society's Team in Training and providing adaptive swim & instruction for students with disabilities. She enjoys training for triathlons and kayaking and is  rarely without one of her signature bows.