About Castilleja Castilleja School is a non-sectarian independent college preparatory school for young women located in the San Francisco Bay Area near Stanford University and in the heart of Silicon Valley. Founded in 1907 by Stanford graduate Mary Ishbel Lockey, the school has an enrollment of 435 girls and young women in grades six through twelve, and has a long-standing reputation for the excellence of its academic program. Castilleja educates young women by fostering their intellectual, physical, creative, and emotional growth through an exemplary college preparatory experience within a diverse and supportive community.  Job Summary