Stanislav Grof, M.D., is a psychiatrist with over fifty years experience researching non-ordinary states of consciousness.
Christina Grof is an author, teacher, artist, psychotherapist, founder of the Spiritual Emergence Network, and co-creator of Holotropic Breathwork.
Tav Sparks is director of Grof Transpersonal Training (GTT), the only training program that certifies people as practitioners of Holotropic Breathwork. Tav is a teacher, consultant, and writer with over 25 years of experience working therapeutically with people in non-ordinary states of consciousness.
Cary Sparks co-directs GTT with her husband, Tav. She has been administrator of the training program since 1991, working at that time with Stan and Christina Grof. In 1998, the Grofs handed ownership of the training to Tav and Cary. Cary has been a certified HB practitioner since 1986.
Director of Grof Transpersonal Training in Russia (GTT Russia), M.D., psychiatrist, narcologist, psychotherapist, psychologist.
co-director of Grof Transpersonal Training in Russia (GTT Russia), endocrinologist, clinical psychologist, certified Gestalt-therapist. Alexandra takes part in scientific research programes studing the effects of Holotropic Breathwork.