In addition, Catherine maintains a significant and active pro bono practice. Representative cases include pursuing housing discrimination claims in federal court, and representing victims of domestic violence seeking protective orders from municipal courts. She has also worked on a number of cases seeking to protect the civil rights of LGBT individuals.

Before joining Foley Hoag, Catherine worked as a clerk in a law office specializing in criminal defense and small civil disputes, taught mock trial and public speaking skills to high school students, and was a member of the University of Chicago Legal Forum.