Graybill began racing internationally in the 2010–11 season, entering a single race on the lower-level North American Cup at Lake Placid, in which she finished 6th. (Lake Placid is also the U.S. Olympic Team's training facility.) The following season, she moved up to the Intercontinental Cup circuit, but for 2012–13 she moved back down to the lower level, starting races on the North American and European tours. She returned to the ICC in 2013–14, and was promoted to the World Cup squad for the 2015–16 season. In her first World Cup race, at Lake Placid, Graybill finished fifth, her best ever showing at the top level of the sport. Her first World Championships appearance was in 2017 at Königssee, where she finished 15th.