Dr Siddaway is Registered with the Health and Care Professions Council (HCPC) and Chartered by The British Psychological Society (BPS). He has worked in a range of NHS mental health services since 2004 and has extensive clinical experience assessing and treating children, adolescents, and adults experiencing a wide range of mental health problems. He gained his Doctorate in Clinical Psychology from the University of Hertfordshire in 2013; his enthusiasm for risk research and psychometrics (psychological assessment and evaluation) led him to undertake a PhD, which he completed in 2017. He is trained in a number of evidence-based psychological therapies for working with complex psychological problems. His doctorates, extensive clinical experience and training, and ongoing Continuing Professional Development mean that he brings a depth and breadth of knowledge of psychological science and evidence-based practice to clinical practice, expert witness work, psychological therapy, and research.

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Dr Siddaway currently splits his time between NHS clinical practice as a Consultant Clinical Psychologist, expert witness assessments, conducting and supervising research, and some private psychological therapy (see specific pages above for further information). He particularly specialises in the areas of trauma/adversity and risk (risk to self, risk to others, risk from others); he conducts research and offers consultation, teaching, training, and supervision to other mental health professionals on these areas.  

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Dr Siddaway's Expert Witness CV