Hans was born in Sumatra. He served as General Secretary of the Anthroposophical Society in New Zealand from 1992-2006. He and his wife Ineke were involved in founding the first Waldorf High School in New Zealand. Hans was director of the one-year diploma course in bio dynamic agriculture at Taruna. Since 2006 he has been helping the Executive Council at the Goetheanum in fostering life of the General Anthroposophical Societies and the School of Spiritual Science in Asia.