Matt O'Neill was introduced as Harvard's diving coach in May of 2019. O'Neill joined the Crimson after a three-and-a-half year tenure with American Flyers Diving and Case Western Reserve University in Cleveland, Ohio.
O'Neill led American Flyers Diving to a fifth-place overall finish, including a victory for the boys team, at the 2018 USA Diving Junior National Championship, including a pair of individual national champions. Over his four years with the club, he coached three different national champions. He was also the head coach at Case Western Reserve from 2015-19, where he mentored one All-American and University Athletic Association Diver of the Year.
O'Neill was a four-year varsity diver at West Virginia, and was the program record holder in the one-meter and three-meter springboards until 2017. He received his bachelor's degree from West Virginia in 2013 in Athletic Coaching Education.