Tammi Van Hollander, LCSW, RPT-S, is a licensed clinical social worker and registered play therapist-supervisor. She is the owner of Main Line Play Therapy: An Expressive Therapy Center in Bryn Mawr, PA. Tammi is an international speaker, play advocate and founding board member of The World Association for Sand Therapy Professionals. She is an Advanced Certified Trainer for the Nurtured Heart Approach®, a certified FirstPlay® practitioner, trained in level one Theraplay® and EMDR. Her work and creative interventions in the field of play therapy and Sandtray therapy have been published and internationally recognized. She specializes in attachment, Sandtray play therapy & sensory integration working with children, families, and adults of all ages. Tammi is the author of an attachment-based multisensory story titled Casey’s Greatness Wings: Teaching Mindfulness, Connection and Courage to Children and creator of Greatness Sticks and Greatness Cards. For more information on Tammi’s publications work, visit her website at
Financial: Tammi Van Hollander is the owner of Main Line Therapy, LLC. and has employment relationships with the Expressive Arts Therapies and the Mid-Atlantic Play Therapy Institute. She receives royalties as a published author. Tammi Van Hollander receives a speaking honorarium and recording royalties from PESI, Inc. She has no relevant financial relationships with ineligible organizations.
Non-financial: Tammi Van Hollander is a member of the Association for Play Therapy and the National Association for Social Workers. She is a board member of the World Association for Sand Therapy Professionals and a program committee chair for the Specialists of Schools.