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We are a competitive water polo and swimming club - with our players and swimmers competing at all levels.


Patriot Aquatics is committed to creating a highly competitive athletic environment in an atmosphere instilled with high ethical values.

Through world-class coaching, Patriot Aquatics strives to build self-esteem, character, teamwork, and a strong work ethic, and we encourage our student-athletes to apply these values to all aspects of their lives.


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The Club provides it's members with the tools and opportunities to become great players, people, and leaders.
  • We have world-class coaches who have excelled in their sports, and have widespread college connections
  • We train in a state-of-the-art Olympic-size pool
  • We have modern equipment plus extra training aids to help advance your skills
  • We participate in monthly tournaments to improve your live game skills
  • You will have excellent preparation to play and swim on your high school team
  • You will develop friends for life – the Patriot family!
  • You will learn and grow in a healthy, competitive, team environment
  • You will learn commitment, discipline, and giving a 100% effort
  • Our double-goal coaching philosophy ensures that you will also learn valuable life lessons along with winning
  • You will be able to serve our community through our outreach program


Patriot Aquatics models PCA's goals:
  1. The Double-Goal Coach, whose first goal is winning, and whose second, more important goal is teaching life lessons through sports.
  2. The Second-Goal Parent, who concentrates on life lessons, while letting coaches and athletes focus on competing.
  3. The Triple-Impact Competitor, who strives to impact sport on three levels by improving oneself, teammates, and the games as a whole.


Patriot Aquatics coaches are committed to excellence.

Club Director & PresidentDUJE GRUBISIC

Head Coach - 16U & 18U Boys Water Polo

Duje Grubisic’s water polo career began in Croatia, where he played professional water polo, starting at the age of sixteen, and had the immense opportunity of being coached by some of the best water polo coaches in the world. Duje then landed a full water polo scholarship at Concordia University where he was voted most valuable player and earned all-American honors, three years in a row. After his undergraduate work, he was offered a graduate scholarship and while earning his Master’s Degree also landed a position as a graduate assistant coach for the men’s water polo team at Concordia. Additionally, Duje has been recognized as the captain of every water polo team he has been a part of.



10U Mixed and High School Water Polo

Coach Tijmen Egtberts was born and raised in The Netherlands. He started playing competitive water polo at the age of 8. His talent got recognized at Santa Rosa Junior College where he played for two years and was added to the coaching staff for one year as well. Tijmen continued his education at Concordia University where he played water polo for one year and was Senior Captain of the swim team his final year. He graduated in 2016 with a Bachelor’s degree in sports management and currently attends Concordia where he is working on a Masters of Science degree in Coaching and Athletic Administration with a focus on aquatics. As a coach, Tijmen has 8 years of experience and in 2017 he coached a 10U team that won the gold division at NJO’s.



12/14U Girls Water Polo

Coach Matt Calhoun is from Visalia, CA in the central valley where he played water polo and swam for Mt. Whitney High School. After graduating he attended the College of the Sequoias for an associate’s degree, where he also swam, before transferring to UC Davis. At Davis he studied Psychology and played for the men’s club water polo team.

Matt has been coaching water polo since the age of 19 beginning with the JV girls water polo team at Golden West High School. While in college he also coached the women’s club water polo B team and was president of the men’s club team for 2 years. Post-college Matt moved to Southern California and began assistant coaching for the Socal boy’s and girl’s 18U and 16U water polo teams.



12U Boys Water Polo

Coach AJ started playing water polo at the age of 13 at Split OC (now OCWPC). He quickly fell in love with the sport and continued to consistently play through college. AJ attended Dana Hills High School, where he was a four-year letter varsity player. In his senior year, he made 2nd team All American and 2nd team All CIF honors while leading the Dolphins to two South Coast League titles. After high school, AJ played at Golden West Community College, where he won two back-to-back state titles. From there, he transferred to Concordia University where he played with Coach Duje for two years, winning back-to-back NAIA titles while being ranked top 10 in the nation. AJ is now a licensed realtor in Orange County and has been working in both residential and commercial.



Patriot Aquatics is committed to creating a highly competitive athletic environment in an atmosphere instilled with high ethical values.


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Mailing Address: 325 Esplanade, Irvine, CA 92612
Practice Location – Beckman High School: 3588 Bryan Avenue, Irvine, CA 92602 | Email: admin@patriotaquatics.org

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