In 2004, McCain initiated a theater project based on oral histories of the blue collar workers responsible for the building and maintaining of the Los Alamos National Laboratory in New Mexico which received workshop readings at the Lensic Center for Performing Arts in Santa Fe, New Mexico, and at the National Museum of the American Indian in Washington, D.C. She is an Associate Artist of the ZSpace Studio in San Francisco, and is an ensemble member of the AlterTheater Ensemble in San Rafael, California.