Miller not only first appeared in the World Cup during the 1998 season but also represented the United States in the 1998 Nagano Olympics, competing in both of the technical disciplines (giant slalom and slalom). In 1999, he also competed in super-G (which is considered a speed discipline, not a technical one) and represented the U.S. in all three events at the World Ski Championships at Beaver Creek, with a best finish of 8th in slalom. He finally achieved a podium in a giant slalom at Val d'Isère on December 17, 2000 (placing third), but then only competed in super-G at the 2001 World Ski Championships; he crashed during the downhill portion of the combined and tore knee ligaments, which ended his competition.