Otteline Lamet (b. 1947) is a licensed social psychologist (Univ. of Utrecht) with more than 20 years' experience in the field of mental health and welfare. She has worked as a manager as well as a therapist and as supervisor. Since '89 she has been in private practice.

Peter van Zuilekom (b. 1938) is a psychomotor therapist (Univ. of Utrecht and Pesso Psychomotor System) with more than 25 years' clinical and poly-clinical experience in the field of mental health.

Both have been trained in Gestalt therapy at the Nederlandse Gestalt Institute.
Otteline and Peter have been a couple since '79, and have many years' experience working together in teaching, training, supervision (organisational settings) and couples' therapy. Many other post doctoral training programmes have contributed to their ongoing personal and professional development.
Both were involved in a programme of personal spiritual development in the
Ridhwan School of A.H. Almaas for 14 years.
Later they studied with
Faisal Muquaddam and Jeremy Klein (Diamond Logos) for 5 years. They were introduced to the Hellinger work in 1993 through Hunter Beaumont. Since than they have worked with Hunter Beaumont, Bert Hellinger, Gunthard Weber, Gabrielle Borkan and Dagmar and Friedrich Ingwersen and many others.
Together, they have been instrumental in introducing this systemic work with family constellations in the Netherlands and have sponsored a public seminar with Bert Hellinger and Hunter Beaumont.
In addition to the work in the Netherlands, they also have worked internationally with family constellations (f.i. Germany, Australia, Nw Zealand, Danmark).