Dr. Walls began her career in education in 2007. She used her experience as a Doctor of Chiropractic to become a career and technical education (CTE) health science teacher in Garland ISD. In 2009, Dr. Walls joined the staff at Robert E. Lee High School (Lee) here in Tyler ISD. She served as CTE health science department lead and technical dual credit instructor at Lee before becoming the health science department head at the Career and Technology Center.

Moving into administrative roles at Lee in 2017, Dr. Walls managed campus operations, redesigned processes to increase achievement ratings, and restructured the Advanced Placement (AP) program. Additionally, as leader of the campus science programs, the school received Texas Education Agency science academic distinctions for two consecutive years. Currently she serves as the Principal of Tyler Legacy High School.