Later, as a single mother in her forties, she earned a BA in 1990, an MA in 1992, and a PhD in ethnic studies in 1995, all from the University of California at Berkeley.
[3][4] Micco joined the faculty of Mills College in 1993, and became chair of the Ethnic Studies department in 1994.
She taught ethnic studies courses at Mills,[5] and spoke on Native American identity issues nationally.
[15] Micco produced the documentaries Killing the 7th Generation: Reproductive Abuses against Indigenous Women, with Diné Navajo educator Esther Lucero, and Every Step A Prayer: Refinery Corridor Healing Walks, with Chihiro Wimbush.
She appeared in the Canadian documentary Reel Injun (2006), on film depictions of Native Americans.