She was the junior national champion in giant slalom in 1980 at Squaw Valley.[11] After being named to the U.S. Ski Team in 1981 she placed 14th[12] in her first World Cup Giant slalom in Val d'isere, France starting from bib number 68.
Armstrong made the 1982 World Championship team[13] in Austria, but broke a leg in a downhill training run and did not compete. She was runner-up in the giant slalom at the 1983 U.S. Nationals, and in January 1984, was third in a World Cup super-G[14] and fifth in a giant slalom,[15] shortly before the Olympics.
At the 1985 World Championships in Bormio, Italy, Armstrong placed 4th in the giant slalom.[16] In 1987 at the World Championships, Armstrong placed sixth in the Super-G.[17] and became the U.S. National Giant slalom Champion.[18]
Dr. Hubert Armstrong, Armstrong's father, is a clinical psychologist at the University of Washington; he participated in the 1988 Winter Olympics, representing the US luge team as the sports psychologist. His 1986 Parenting the Elite Athlete (Armstrong, Hubert E., Jr., Ph.D. (February/March 1986) has gained traction as a classic sport parenting article in alpine ski racing.
After her retirement from competitive skiing following the 1988 World Cup season, Armstrong has led various humanitarian causes, including the Debbie Armstrong Say No to Alcohol and Drugs campaign; the SKIFORALL Foundation, which opens skiing events to the disabled; and Global ReLeaf Sarajevo, which seeks to reforest Sarajevo after the Bosnian war. Armstrong moved to Albuquerque, NM and attended University of New Mexico and earned an undergraduate degree (Bachelor of Science) in History.
Armstrong served as the Ski Ambassador at Taos Ski Valley for eight seasons. Simultaneously, she served a four-year term on the Professional Ski Instructors of America (PSIA) Alpine Demo Team[21] which marked the first time a former US Ski Team athlete qualified for the Demo Team.
The PSIA Demo Team (now known as the PSIA-AASI Alpine Team) is made up of the top ski instructors in the nation. These professionals are "some of the best skiers and riders in the game and they are inspirational educators and lifelong learners. Every four years, thirty men and women are chosen to represent the association following a rigorous selection process. Team members are responsible for promoting, supporting, and assisting with the development of PSIA-AASI education materials, programs, and activities at all levels. They set the standard for U.S. snowsports instruction and embody the ski and snowboard experience."[22]
In 2007, Armstrong moved to Steamboat Springs, Colorado where she served one year as Technical Director for the Steamboat Ski Resort (Armstrong 2008, p. 36). In 2008, she became the Alpine Director at the Steamboat Springs Winter Sports Club,[23] a world-renowned ski club located in Steamboat Springs, Colorado, a position she held for six years. Beginning with the 2014 season, Armstrong transitioned to the U10 Head Coach position and Coach Trainer at the Sports Club.
Currently, Armstrong is specializing in the training and development of young skiers (U8-U12)[24] and serves on numerous US Ski and Snowboard Task Forces for Education, Athlete Development and Gender Topics. Armstrong produces specialized training videos for coaches and athletes.