Coaching Staff

Brian Anderson - Head Boys Water Polo Coach
Brian Anderson has been the Head Coach of Mater Dei High School Since 2018. 
Coach Anderson completed his Masters of Education as a Gradfellow Coach at Whittier College with the Men's Water Polo program from 2007-2009.  He then served as the Head Coach at Huntington Beach High School and revamped the program to its current national prominence, and was 2x Sunset League Coach of the Year. 
Anderson, as a co-founder of Vanguard Aquatics, recognized as one of the top club programs in America, helped develop several National Team Caliber Athletes, with many going on to play for some of the most prestigious water polo schools in the nation.  With Vanguard, he has won 4 National Titles, including a Silver Medal and Bronze Medal at the National Junior Olympic Tournament.  In 2017, Coach Anderson was awarded the USA Water Polo Ted Newland Coaching Award for his club based efforts, and Vanguard Aquatics has twice won the USAWP Chairmans' Cup.
Mater Dei has remained one of the top programs in the Nation under Coach Anderson.  The Monarchs have continued to claim Trinity League Titles, and in 2021 being a Semi-Finalist in the Open Division or CIF, and a California State Regional Finalist while being ranked #1 in Division for a majority of the season.  Coach Anderson has sent several players from Mater Dei to play at NCAA schools, where they excel with their experience here at Mater Dei.
"I love being at Mater Dei.  This school is the perfect fit for a student-athlete looking for the complete package of rigorous academics and athletics setting them up for future endeavors in any future they hope to excel in.  It is one of the most unique family oriented institutions in the nation."
Brian McSweeny - Boys Assistant Water Polo Coach, Girls Head Water Polo Coach
  • United Water Polo Club 
  • Golden West College State Champion 
  • Concordia University 
Zachary D'Sa - Lower Level Coach 
  • Captain of USC Mens Water Polo 2018
  • 2018 National Champion USC Mens Water Polo 
  • Member of USA Water Polo Cadet National Team 
  • Long Beach Century Club Player of the Year 
  • Moore League Player of the Year 
  • CIF Division II Champion - Long Beach Wilson 
  • USC Class of 2019 Graduate in Biology 
Wyatt Benson - Lower Level Coach 
  • 2 Time CIF Champion Mater Dei High School 
  • All Trinity League, All CIF Selection, Mater Dei High School 
  • 2 Time NWPC Champion, Princeton Water Polo 
  • 1st Team NWPC Selection, Princeton Water Polo
  • Degree in History, Princeton University 2022
Bowen Lasher - Lower Level Coach 
  • Golden West Water Polo