Collier began diving for Arapahoe High School in Littleton, Colorado his freshman year and joined Mile High Dive Club in Denver his sophomore year under Jenn Hess and Jack Perkins. His senior year of high school, he qualified for his first junior national championships in 2022. Collier joined the Mission Viejo Nadadores family in May 2026 after graduating from the University of Missouri. During his collegiate career under head coach Kyle Bogner and three different assistant coaches including Brandon Loschiavo (former Nadadore), he won an SEC championship silver medal on the 10m platform, bronze medal on the 1m springboard, and finished as the 3m NCAA Champion in March 2026. He was also voted Male Athlete of the Year at the University of Missouri for the 2025-2026 athletic season. Nationally, Collier came 2nd (3m) and 3rd (1m) individually and a 3rd in 3m synchro with Max Flory in 2025. He also finished 3rd in the 3m synchro event at the 2026 spring nationals. Internationally, Collier finished 13th in the 2025 World Championships in Singapore on the 3m springboard. The same year, he placed 2nd at the Canada Cup in Gatineau and 3rd at the Junior Pan American Games in Asuncion, Paraguay. In 2026, Collier won gold in the 3m synchro event with Max Flory at the Canada Cup in Windsor and silver at the Madrid Diving Invitational individually on the 3m springboard. 

Off the pool deck as a diver, Collier enjoys coaching, spending time with his family, any type of game involving competition, trying different restaurants, reading, solving rubik’s cubes, watching movies, listening to music, and learning more about a potential career in banking or wealth management once his professional diving career comes to an end. He is thrilled to be a part of the Nadador family!