Montijo received her Bachelor of Arts in law with a minor in psychology from the University of Arizona College of Social and Behavioral Sciences. She completed her Master of Legal Studies at the University of Arizona James E. Rogers College of Law. During her undergraduate studies, she also attended the American University of Rome in Italy.

Since joining the University of Arizona in 2022, Montijo has served in a variety of administrative roles, including student engagement support and as an administrative assistant to the provost for academic affairs. She went on to work as a program coordinator with the Clinical and Translational Sciences Research Center, where she supported clinical trials and pharmaceutical studies.

In September 2025, Montijo moved to the Physician Assistant Program as an administrative coordinator, where she provides operational, programmatic and executive support to the program director, faculty members and staff.