Martha Sweezy, PhD, is an assistant professor, part-time, at Harvard Medical School, a program consultant and supervisor at Cambridge Health Alliance, and the former assistant director and director of training for the dialectical behavior therapy program at the Cambridge Health Alliance. She has co-authored several books on IFS, including the Internal Family Systems Couple Therapy Skills Manual: Healing Relationships with Intimacy from the Inside Out with Toni Herbine-Blank, the 2nd Edition of the book Internal Family Systems Therapy with Richard Schwartz, the IFS Skills Training Manual with Frank Anderson and Richard Schwartz, Intimacy from the Inside Out: Courage and Compassion in Couple Therapy with Toni Herbine-Blank and Donna Kerpelman. Additionally, she co-edited (and co-authored) two chapter books on various applications of IFS with Ellen Ziskind: Innovations and Elaborations in Internal Family Systems Therapy and Internal Family Systems Therapy: New Dimensions. She has published articles on IFS in the Journal of Psychotherapy Integration and the American Journal of Psychotherapy. She has a therapy and consultation practice in Northampton, Massachusetts.