Bertold is a German and lives in Freiburg im Breisgau, Germany. He holds a doctorate in law and a degree in psychology. He first worked as a psychotherapist, then specialized in NLP and worked as a management trainer for 15 years.
In 1994, he joined the constellation work and devoted himself exclusively to it for the next 10 years. During this time he also participated in a training in trauma therapy (Somatic Experiencing). Afterwards he combined constellation and trauma work and held seminars in many countries, also in South Africa. Since 12 years China has been a focus of his travels.
He is the author of 30 books on the topics of communication, self-management and constellation work, of which there are translations into ten languages to date. In 2016 he started to offer internet courses for personal growth, also teaching there constellation work.