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William Berisch Secretan, FRSA. MA. PGDip. EATCert.


Managing Director & Co-Founder of the SEAT Ltd.

Course Convenor, EAT Certificate Training

William qualified as a person-centred wilderness therapist in 2005. Since then he has trained as a dramatherapist, psychodrama psychotherapist and environmental arts therapist, and has completed undergone further training in Jungian psychoanalysis. William works for West London NHS Trust as Lead Psychotherapist in a Community Rehabilitation Service for adults considered to have Complex Psychosis. He previously worked for Devon Partnership NHS Trust for nearly ten years within a Psychology & Psychotherapy service for adults with severe and enduring mental illnesses. At Devon Partnership Trust, William lead on the development of Ecopsychology & Ecotherapy services for the Trust and ran weekly environmental arts therapy groups. William was the founder of the NHS Ecopsychology Network and he also runs a private practice working with individuals and groups, both indoors and outdoors. 

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William Berisch Secretan

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Who we are...

Ian Siddons Heginworth

Ian Siddons Heginworth, MPhil. RDth. HCPC Reg.

Founder of the EAT Certificate Course


Ian is the leading pioneer of environmental arts therapy. Until his retirement in 2022 Ian ran a private practice as an environmental arts therapist near Exeter, Devon. Ian is the author of “Environmental Arts Therapy and the Tree of Life”, the book that inspired the growth of EAT in the UK, and the co-editor of “Environmental Arts Therapy, The Wild Frontiers of the Heart”. For over 35 years Ian was employed by Devon Partnership NHS Trust as a clinical supervisor in environmental arts therapy and as a specialist practitioner developing outdoor therapeutic services for adults with profound and complex disabilities, and for adults with severe and enduring mental health issues. Ian led training events for many years throughout the UK and internationally, but especially at the London Art Therapy Centre and at Spirit’s Rest Therapeutic Woodland in Devon. Before retiring, Ian cofounded The School of Environmental Arts Therapy with William Berisch Secretan and has continued to provide much welcomed guidance, inspiration and support to the school. Whilst Ian is no longer directly involved in teaching at the SEAT, his creativity, wisdom and love permeates all that we do. 

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