OUR TEAM
NATHAN A TEISMANN, MD
MEDICAL DIRECTOR, SHAMANIC MEDICINE PRACTITIONER, BREATHWORK, MEDITATION, AND VISION QUEST LEADER
Medical Training
Dr. Teismann grew up in St. Charles, Illinois, and attended University of Michigan, graduating with a degree in Botany in 1998. He then worked at the American Alpine Institute in Bellingham, Washington, leading alpine climbing trips in the North Cascades. He attended medical school at the University of Chicago and completed residency training in Emergency Medicine at Alameda County Medical Center-Highland Hospital in Oakland, California, in 2008. Between 2009-2020, Dr. Teismann worked as an emergency physician at UCSF Medical Center in San Francisco and served on the faculty of the UCSF School of Medicine, teaching medical students, residents, and fellows. While at UCSF, Dr. Teismann authored 18 publications and was the recipient of numerous teaching awards. He continues to practice emergency medicine today with SFEMA/Sutter in San Francisco and in Lake County, California.
Shamanic Training
Following a period of intense emotional and physical challenges in his early 40s, Dr. Teismann’s life was transformed through his work with the Q’ero, an indigenous group native to the Sacred Valley in the Peruvian Andes. While being guided through a process of deep emotional and spiritual healing, Dr. Teismann recognized his calling to integrate these traditions into his own practice. He subsequently completed a curriculum in traditional Q’ero Medicine through study with Alberto Villoldo and Marcela Lobos at the Four Winds School of Shamanic Medicine, which deepened his understanding of the spiritual elements that underlie all human disease. Concurrently, he began training with Ocean WhiteHawk, a metaphysical teacher and healer who founded the SAMADHI Center, a global spiritual training center based in Hong Kong.
Breathwork & Psychedelic Medicine
Beginning in 2005, Dr. Teismann began studying pranayama breathwork and began a practice of sudarshan kriya through the Art of Living Foundation. In 2017, he received training in Holotropic breathing from Stan Grof, MD, who originally pioneered the technique, which uses the breath to create a state of elevated awareness.
In 2019, Dr. Teismann trained with Phil Wolfson, MD and Julane Andries, MFT at the Ketamine Training Center, and subsequently joined them in clinical practice at the Center for Transformational Psychotherapy in San Anselmo, California. The CTP was among the first clinics to offer ketamine-assisted therapy for mental illness.
TIFFANY ALLEN
CENTER DIRECTOR, YOGA, MEDITATION, CHILDREN’S MEDITATION, SOUND HEALING, CHANTING, SOUL PORTRAITS
Approach
Tiffany Allen’s work is rooted in a deep commitment to personal transformation, shaped by both lived experience and rigorous study. Having moved through significant challenges earlier in life, she has done the work of shifting out of deeply ingrained survival patterns and into a grounded experience of self-responsibility, self-trust, and authentic self-love.
This lived transformation informs the way she holds space—steady, compassionate, and clear. Her work does not center on fixing or advising, but on guiding individuals back into relationship with themselves, where meaningful and lasting change becomes possible.
Background
Tiffany holds two degrees in Architecture and spent 15 years working in the field of Design, developing a disciplined understanding of structure, aesthetics, and the impact of environment on human experience.
This foundation continues to shape her work today. At TREE OF LIFE she has created a space that is both aesthetically inviting and energetically intentional—an environment designed to support nervous system regulation, emotional safety, and depth of presence.
Sound Training
Tiffany began studying piano at the age of four and spent over three decades in classical training, later teaching and mentoring students of her own.
Music remains central to her work—not as performance, but as a modality for regulation and healing. She integrates sound through singing bowls and tonal resonance to support emotional release, meditative depth, and internal coherence.
Her years as a piano teacher also developed her ability to work with children in a way that is both structured and deeply attuned—an approach she continues to bring into her meditation work with younger clients.
Energy and Reiki Healing
In 2001, Tiffany began her training as an energy healer and has spent over two decades working with a variety of individuals needing deep energy work, such as veterans of war, traumatized women, and over-stimulated (ADHD) children.
The way she approaches her clients is intuitive and grounded, with a clear respect for each individual’s process. Rather than directing outcomes, she facilitates a space where clients can access their own healing capacity and move at a pace that is both supported and sustainable.
Spiritual Psychology
Tiffany is currently completing her certification in Spiritual Psychology at the University of Santa Monica. She supports clients in turning inward—accessing their own internal wisdom, strengthening self-trust, and developing the capacity to meet life’s challenges from a grounded and self-led place.
Yoga, Meditation & Integrative Studies
Tiffany has formal meditation training through the Chopra Center. She also completed a course of study in Somatic Movement Meditation through the Kindred Curriculum, and received her Yin Yoga certification in 2024.
Each of her sessions integrate yoga, meditation, and sound healing into a cohesive and deeply restorative experience. Drawing from her continued studies Ocean Whitehawk and the SAMADHI Center in Hong Kong, she works at the intersection of emotional and spiritual development, supporting clients with clarity, presence, and depth.