Ruth Castellano is a Licensed Professional Counselor and STA Certified Sandplay Therapist who serves as the Sandplay Therapists of America Regional Representative for New York and New Jersey. She founded the NY/NJ Sandplay Association and maintains a sandplay training program.

Her work is grounded in the Kalffian tradition of Jungian sandplay therapy, and she is actively building the sandplay community in the Northeast United States.