As Baylor equestrian's first assistant coach, Armstrong led her Western team through competitions against top caliber competition. Baylor's Horsemanship and Reining riders received a coveted invitation to the Varsity Equestrian National Championships in April 2006, the only first-year Western team invited. In 2007, Armstrong led the Lady Bears to a fifth-place VENC finish and an eighth-place finish in 2008.
In 2009, Armstrong helped guide the the team to a seventh place finish in the VENC. The western team also assisted the Bears in receiving their first ever No. 1 team ranking, that came out on Feb. 24, 2009.
Prior to arriving in Waco, Armstrong spent two seasons as an assistant coach at Fresno State and the Bulldogs' Western riders went undefeated against regional competition during Armstrong's tenure there. Under her direction, the Bulldogs earned Regional and Zone championships and reserve National champion status at the 2004 IHSA National Championships and reserve National champion status at the 2005 Varsity Equestrian National Championships. Armstrong also guided four individual riders to national champion status, including one AQHA trophy reserve title, and three riders to the NRHA Derby Collegiate Reining.
Prior to Fresno State, Armstrong was an assistant coach at Ohio State from 2002-03 and a teaching assistant at her alma mater, Oklahoma State, in 2001. Her coaching experience also extends overseas, where she taught Western Horsemanship and showed Reining and Western Pleasure horses for Teglgard Ranch in Denmark.
As a member of the OSU's equestrian team, Armstrong placed in the top four in the individual Open Western Horsemanship and Reining helping Zone 7 claim the 2000 National Zone Championship. That same year Oklahoma State attained national champion status. In 2001, Armstrong captured the Alumni Western Horsemanship title at the IHSA National Championships.
As a youth rider, Armstrong was an AQHYA World Show attendee and was the youth world champion in Western Pleasure, Reining and Halter under the American Buckskin Registry Association.