About Us

About Us

MTAS Psychology was established in December 2009 as a small Manchester-based provider of medico-legal assessments and reports. Since then, we have grown to one of the country’s leading providers of Expert Witness and psychological treatment services to the legal and corporate sector. We produce over 750 Court reports each year and are proud to provide psychological therapy services across a range of sectors, including post-injury rehabilitation, gambling addiction and corporate mental health schemes.

Meet the Team

Dr. Jamie Barsky

Consultant Clinical Psychologist

I am head of the service and Clinical Lead for our medico-legal department. I am a Registered and Chartered Consultant Clinical Psychologist (HCPC Reg No PYL24089), having obtained a Doctorate in Clinical Psychology from The University of Liverpool. I have worked in the field of mental health and psychology since 2003, across various clinical areas, and I have a Bachelor’s Degree in Applied Psychology. I am outgoing Chair of the IPT-UK national training committee. My work as an Expert Witness sees me completing hundreds of reports each year and I have provided verbal evidence under cross-examination and at legal conferences on many occasions. In addition to my role at MTAS Psychology, I work part-time in the NHS with young people and families suffering significant mental ill-health.

Please contact one of the team for any enquiries:

Marsha Barsky
Marsha Barsky

Operations, Recruitment and High Value Account Manager

Marsha Barsky

I have 20 years’ experience working as a Marketing Manager, Senior Recruitment Consultant and Business Owner. At MTAS Psychology, I lead on the recruitment and onboarding of new clinicians and therapists. I provide a ‘hands on’ account management service for our high value instructing parties within our Medico-Legal department. I am Operations Manager and Treatment Coordinator for our treatment department, ensuring a smooth and efficient service for our patients and corporate partners.

Dr Diana Macleod
Dr Diana Macleod

Registered Clinical Psychologist

Dr Diana Macleod

I am a registered Clinical Psychologist (HCPC No PYL27804), having obtained a Doctorate in Clinical Psychology from the University of Sheffield. I have worked in the field of mental health for over 18 years, across various clinical areas. I received a First Class Degree, as well as being awarded the Harry Kay Psychology Prize for my research dissertation.


I currently work as a Child & Adolescent Clinical Psychologist in the NHS, where I am responsible for assessing, intervening and Case Managing children and families with significant emotional, behavioural and psychiatric difficulties.


My work as an Expert Witness at MTAS Psychology involved the provision of assessments and reporting within their Personal Injury, Clinical Negligence and Occupational Stress departments. Last year I accepted over 200 instructions for medico-legal reports, mainly in the Personal Injury department.

Madeleine Dunham
Madeleine Dunham

Consultant Clinical Psychologist

Madeleine Dunham

I am a Consultant Clinical Psychologist (HCPC No PYL05301) with 25 years’ experience in the assessment and treatment of children, adolescents and their families in the NHS both in multi-professional teams and individually.


Prior to my move into full-time independent practice, I was most recently employed as Head of Child & Adolescent Clinical Psychology at Bristol Children’s Hospital, which provided a service both to child and adolescent mental health, learning disability, forensics, substance misuse and paediatrics.


I have over 25 years’ experience as an expert witness in public and private family law and criminal law cases. I have accepted over 1000 instructions as a single joint expert and have given evidence in court on many occasions.

Dr Laura Gregg Rowbury
Dr Laura Gregg Rowbury

Principal Clinical Psychologist

Dr Laura Gregg Rowbury

I am a Principal Clinical Psychologist (HCPC No PYL27375) still working in the NHS with adults with complex physical and emotional needs. I am a published academic research author and Expert Witness for MTAS Psychology’s medico-legal assessment service, accepting instructions at a rate of approximately 160 reports a year. I have provided evidence under cross examination and at legal conferences.

Dr Laura Lever
Dr Laura Lever

Principal Clinical Psychologist

Dr Laura Lever

I am a Principal Clinical Psychologist (HCPC No. PYL35169) with 15 years’ experience working across a range of mental health settings, supporting children, adults and families, particularly where there have been complex histories of trauma and attachment difficulties. I tend to draw upon relational models of emotional distress, including Cognitive Analytic Therapy, and Systemic or attachment-focussed approaches.
My work within a medico-legal setting requires assessments and reports for Care Proceedings, Civil Law and Criminal Law cases. I have attended numerous legal conferences to provide verbal evidence.

Dr Natalie Skellon
Dr Natalie Skellon

Principal Clinical Psychologist

Dr Natalie Skellon

I am a Principal Clinical Psychologist (HCPC No PYL34030) with over 15 years of clinical experience working with children, adolescents and adults with mental health and behavioural difficulties in secure and community settings. I have experience of facilitating assessments and interventions with children and adults who present with difficulties associated with Self-harm and suicidal ideation, low mood, anxiety and anxiety associated disorders, attachment and developmental trauma, traumatic experiences, cognitive difficulties, violent or challenging behaviour and harmful sexual behaviour.


I have experience of completing specialist risk assessments of violent and harmful sexual behaviour in children and adolescents in order to inform recommendations for risk assessment / management and further assessment and intervention. I have specialist experience of facilitating therapeutic inventions for harmful sexual behaviours with children who have or have not been convicted of such offences.


My work at MTAS Psychology involves the provision of comprehensive assessments and reports for children and adults who have suffered abuse and/or trauma during their childhood or adult life.