ISTDP London was founded by Dr Lewis, a chartered clinical psychologist registered with the British Psychological Society and the Health and Care Professions Council who has over 20 years experience in the field of mental health.

Dr Lewis is an IEDTA certified supervisor and trainer. She has been a visiting lecturer on clinical doctorate programmes in the UK, and presented nationally and internationally at workshops and conferences. She provides individual supervision in ISTDP as well as running introductory courses and core training groups and has published  in the areas of trauma and ISTDP.

The ISTDP London training approach is focused on the attachment-based model of ISTDP established by Robert J. Neborsky, MD.