About Us
MEET OUR
Fully Qualified Instructors

Ervin Martinez
Owner / Head Coach
ABOUT ERVIN MARTINEZ
Certifications:
CrossFit Endurance
CrossFit Level 2
OPEX Level 1
USA Weightlifting

Celestial Banda
General Manager / Head Coach
ABOUT CELESTIAL BANDA
Originally from Kingsville, Texas – where she graduated from Santa Gertrudis Academy High School in 2016, Coach Celestial Banda (Coach C) played college softball at Trinity Valley Community College (Athens, Texas) 2016-2017, Huston-Tillotson University (Austin, Texas) 2017-2018, and Texas A&M Univeristy – Corpus Christi (TAMUCC; Corpus Christi, Texas) 2019-2020.
Her goal is to bring education, knowledge, intention, & application to different realms of fitness (CrossFit & sports) within south Texas. She has a passion for making her home more aware of the benefits and outcomes to life filled with quality through movement and mindset.
Certifications:
TAMUCC M.S. Exercise Science
CrossFit Level 2 Trainer (CF-L2)
ACSM Certified Exercise Physiologist (ACSM EP-C)

Yasminda Serrano
Full-Time CrossFit Trainer / Admin
ABOUT YASMINDA SERRANO
Yasminda has always had a love for movement and was intrigued by exercise & the human body however growing up she had limited guidance in this area. Throughout her life she played in different areas of dance such as High School Pep Squad & Dance Team, Folkloricio Dancing and Middle Eastern Dancing. She loved dance but was guided down a more conventional route of pursuing her degree in Finance and working in Corporate America for nearly 2 decades. Living a mainly sedentary lifestyle while eating the Standard American Diet and working on a computer for 8+ hours a day was really impacting her health causing excessive weight gain, low energy, lack of confidence and much more. Looking to just lose some weight Yasminda joined Contender CrossFit with the guidance from a Coach & Mentor. Unbeknownst to her this moment would change the rest of her life, not only physically but mentally and emotionally.
“Prior to coming to Contender I worked out at a gym, did some dance classes, boot camp and kickboxing stuff but never really knew much about weight training. At Contender, I found this community like no other whom helped me discover depths of myself (both in the physical & mental aspect) that I never thought were possible. This stuff is life changing and I knew I needed to dedicate my life giving back to others the life that I was given back, so I took a chance & made a career change. I love people and truly want to see others excel and live a life of fulfilment; taking control of one’s health is a major part of that and I am ever so grateful when someone lets me be a part of that. “
Certifications:
CrossFit L1
Precision Nutrition L1
Birthfit Coach
OPEX CCP L1
CHEK Holistic Lifestyle Coach L1
CHEK Holistic Health & Performance for Women

Sebastian Banda
Full-Time CrossFit Trainer
ABOUT SEBASTIAN BANDA
Coach Sebastian Banda was born and raised in Corpus Christi, Texas – graduating from King High School (2016). He started his CrossFit journey in 2015 – hoping to get stronger, better, & faster for high school sports. He quickly fell in love with the sport of CrossFit itself & has dedicated majority of time, since then, to be the best version of himself possible. Along the way, he found that inspiring others to do the same was something he wanted to do for the rest of his life. ‘I love helping others, especially when they want better for themselves! The hardest part is walking through those doors. Once you are in, you will never want to leave! Trust the process!
Certifications:
CrossFit Level 1 Trainer Online

Cameron Garcia
CrossFit Trainer / Head Coach of Contender CrossFit Kids
ABOUT CAMERON GARCIA
Cameron is a native of Corpus Christi and graduated from Flour Bluff High School. He was involved in various sports and 4H, raising Livestock throughout his years in school. After High School Cameron worked at the Corpus Christi Athletic Club working with fitness and Powerlifting and found his way into the sport/therapy field and wanted to do more to help people achieve their goals. Cameron is a CrossFit Level 1 Trainer, certified FMT Therapist (Functional Movement Therapy) and Movement Specialist at Armadillo Sport Chiropractic and is certified in various myofascial techniques including: RockTape, Cupping (Myofascial Decompression), Graston and FAKTR. His goal is to help all athletes that he works with to perform to the highest level in all aspects of their lives.
Certifications:
- CrossFit Level 1 Trainer
- Certified Movement Specialist
- Certified FMT Therapist
-
Professional Youth Fitness Coach (Brand X Method)

Hannah Garcia
Assistant Head Coach of Contender CrossFit Kids
ABOUT HANNAH GARCIA
The reason behind why I coach – I believe every person who pursues their health could benefit from a consistent and authentic coach. I love and believe in community and relationships when learning anything new. Coaching CrossFit is a form of relationship where I can pour into someone with my experience and passion for the sport and people.
For someone who is starting out in CrossFit, I would say to not compare yourself to other CrossFit athletes! If you come in and give your best for that day then you will grow over time in what you are capable of. We are all here to cheer you on and learn from each other!
Certifications:
Professional Youth Fitness Coach (Brand X Method)
CF-L1 Trainer

Bailey Volkmann
Crossfit Trainer