Brett grew-up in Mill Creek and attended Jackson High for two years before going on to advanced gymnastics training in Colorado. He made his official worldwide debut at the 2001 Goodwill Games in Brisbane, Australia, where he received an average score of 9.362 to win the bronze medal in the pommel horse. Brett was a world-class gymnast competing for the U.S. Senior National Team during seven seasons. He competed in six U.S. Championship meets, collecting 12 top-three finishes (12 medals). In both the 2001 and 2004 meets, he was first place in the pommel horse. Internationally, he competed in twenty plus competitions including three World Championships, as well as in seven of the prestigious Winter Cup Challenges. At the 2003 meet, he was the champion on the pommel horse, high bar and all-around. Also during international competitions, he was a part of three first-place teams. Individually he earned 10 first-place finishes and over 20 second or third-place marks. He was on the U.S. Olympic Team in 2004 for the Games in Athens and helped his team win the silver medal, which was the best team finish by the U.S. men in 20 years.
Brett retired from competitive gymnastics in May of 2006 and as currently (as of July 2019), serves as the Men’s High Performance Director with USA Gymnastics. He also served as the Men’s Gymnastics Coach at the University of California from 2013-2017, Berkley. Prior to this position, he was an Assistant Coach at, first, the Air Force Academy then Stanford University. In 2005, he was selected as one of the Everett Herald’s Top-50 Athletes from Snohomish County.