Coach McCollum has coached club, college and high school water polo for over 20 years. Prior to moving to San Diego in 2018, he coached the 18U Boys at California Republic SC, the club he created and operated in Northern California. He also coached the American River College Men’s teams for 11 years. He has won multiple section titles as a Varsity Boys coach at Del Oro High School, Jesuit High School and Christian Brother High School. As a player, he played for Sacramento Water Polo Club, Jesuit High School and Chaminade University.