A young athlete with huge talent, Ali Nullmeyer had her first World Cup start at the 2017 FIS World Championships in St. Moritz where she finished in 27th-place. She dominated the Nor-Am circuit in 2017 capturing the overall title and the Slalom overall title. Nullmeyer suffered a season-ending injury in October 2017, taking her off the circuit for the 2017-18 season. Nullmeyer returned to snow in the 2018-19 season, even taking part in the World Junior Championships, where she claimed 9th in the Giant Slalom event.