Mark was born in West-Berlin, Germany, and has lived in the USA, India, and Germany. From an early age he has been fascinated with the spiritual quest of the human soul, which eventually led him to the study of indigenous traditions and native wisdom. Mark has a degree in Theology and a PhD in Clinical Psychology. He is a founding member of Ken Wilber’s Integral Institute, an Advisory board member of the Association Holotropic Breathwork International, and a Founding member of the German College for Transpersonal Psychotherapy. He has studied indigenous ceremonial traditions with Luis Eduardo Luna.

He has written ‘Das Selbst als Ort der Gotteserfahrung’ (The Self as the Dimension of Spiritual Experience) and several articles about Kundalini, and Near-Death Experiences in the ‘Journal of Near-Death Studies’, the ‘Inner Door’, and ‘Religion ...