She teaches Introduction to American Government, Honors American Government, Judicial Process, and Women & Politics courses. In 2015, Mancillas was appointed chair of the American Political Science Association Committee on the Status of Latinos y Latinas in the Profession. Mancillas is a member of the GGC Faculty Senate, the GGC Honor’s Council, the Environmental Studies Program Committee and is faculty advisor to the GGC Democrats. She served on the SLA Dean’s search committee in 2013.