Margi Flint owns and operates EarthSong Herbals, a busy family practice and herb school in Marblehead, Massachusetts. For over thirty years she has worked as a labour coach, polarity therapist, and herbalist. She has been Adjunct Professor at Tufts University School of Medicine where she taught a four-week rotation in clinical herbal medicine for Fourth Year Medical Students and practitioners at Union Hospital and her clinic in Marblehead, Massachusetts. She continues to teach Herbal Pharmacology at North Shore Community College, and for The Masters of Applied Natural Products course at Massachusetts College of Pharmacology. She is a professional member of the American Herbalist Guild and serves as an Herbal Mentor for those who aspire to professional membership in the organization. She oversees two Practitioners Circles, one at her clinic in Marblehead and one in Newport Rhode Island.