Ali Nullmeyer made the Canadian Alpine Development Team in 2015 and has seen great success on the Nor-Am Cup circuit. At the 2016 FIS Junior World Ski Championships, Nullmeyer captured a top-ten finish in the slalom race. At the 2016 Youth Olympic Games, Nullmeyer skied to three top-ten finishes, including a silver medal in the slalom, fifth-place in giant slalom and seventh-place in super G. Nullmeyer finished off the season with a second-place finish in the alpine combined race at the National Championships. 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.