Our Clinical Team Members          

Dr Siri Harrison

Dr Siri Harrison

Dr Siri Harrison, CPsychol, PhD, MA, BA  

Consultant Clinical Psychologist & Practice Director

I am a seasoned Chartered Clinical Psychologist with over 15 years of experience in clinical practice. When working with clients, I take a very down-to-earth and dynamic approach – taking an interactive role in addition to listening and providing a safe holding space. As a psychotherapist, I provide my clients with feedback, clarification and education around a given problem, as creating an understanding is paramount to effecting change. In addition to exploring the emotional and psychological underpinnings that my clients are experiencing, I also outline the practical steps that need to be taken in order to actualise change.

Clinical Approach 

I don't believe that there is any one particular type of therapy that suits all people and all needs. As such, I integrate a variety of therapeutic techniques that are clinically proven to be effective including Cognitive Behavioural Therapy (CBT), Acceptance & Commitment Therapy (ACT),  Mindfulness Therapy (MBSR), Compassion Based Therapy & Psychodynamic Therapy. 

I carefully draw from, apply and integrate these different therapeutic techniques depending on what suits a person and their situation best.  This allows clients to express themselves in a way that feels natural to them whilst also receiving that therapy which is most appropriate and helpful.   

Education, Experience & Certification

I was educated and trained in New York City at the New School for Social Research, where I earned a Masters and PhD in Clinical Psychology. I subsequently worked in New York for several years in both large urban hospitals and private practice.  I have also trained at the world-renowned Beck Institute for Cognitive Behavior Therapy in Philadelphia. After relocating to the United Kingdom in 2011, I worked as a psychotherapist in private group practice at City Psychology Group and Efficacy Ltd in Central London, and now own and run my own clinical practice. 

I am formally recognised as a Clinical Psychologist in both the United Kingdom and United States and hold certification & membership with the following professional bodies:

  • British Psychological Society (BPS )

  • Health and Care Professions Council (HCPC)

  • British Association for Behavioural / Cognitive Psychotherapies (BABCP)

  • American Psychological Association (APA)

  • New York State Board of Professions (NYSBP)

See Dr Harrison's Detailed CV


Dr Nicole Nasr

Dr Nicole Nasr

Dr Nicole Nasr, DPsych, MA, BA

Counselling Psychologist & Clinical Associate

I am a chartered Counselling Psychologist who recently finished her training at City, University of London. I have a broad range of clinical experience working with depression, anxiety, work related stress, bereavement, low self-esteem, adjustment to chronic illness and more specifically relationship issues. In fact, I developed a special interest in relationship issues and couples therapy after having spent three years studying the psychological impact of being a Wife of a Diplomat. During this time, I deepened my knowledge on couples dynamic and professionally developed my understanding on relationship issues.

Clinical Approach

As a Counselling Psychologist, I believe that offering a compassionate, warm and integrative approach to my clients is the basis for good therapeutic work. I truly believe that each client is unique and hence cannot fit into a particular model. Consequently, I integrate different approaches and create a tailored treatment plan collaboratively with each client. In addition, given the importance of the therapeutic relationship, I focus mainly on committing to my clients and empower them throughout their journey. I do so by helping them find different practical ways to overcome their issues, while focusing on the psychological and emotional underpinnings of their experience.

During my doctorate, I was mainly trained using the Person-Centre and Cognitivie Behavioural approaches and their third-waves derivatives. As a result, I integrate a variety of therapeutic techniques, all in the goal of responding to clients’ needs. In addition, I truly believe that collaboration is a reinforcing asset to the therapeutic work, and I constantly aim to help clients become active participants to their therapeutic process.

Psychologist Dr Nicole Nasr speaking on TedX

Education, Experience and Certification

I was born and raised in Montreal and moved to Lebanon at the age of 17. I did my B.A. in Psychology at the American University of Beirut and worked for one year as a clinical assistant to a psychiatrist at the Saint George Hospital University Medical Centre. I was then educated and trained at City, University of London where I earned a Masters in Health Psychology and a DPsych in Counselling Psychology. I trained in different practices, both privately and within the NHS.  


Jess MacIntyre, BA (Hons), MA, Msc

Jess MacIntyre, BA (Hons), MA, Msc

Jess MacIntyre, BA (Hons), MA, Msc

Assistant Psychologist & Practice Manager

Jess is an Assistant Psychologist, scholar and activist, specialising in the mental health of refugees, asylum seekers and LGBTQ+ communities.

In 2012, she founded ReachOUT, a support organisation for refugee and asylum seekers. She delivers LGBTQ+ intersectionality trainings to third sector, NHS, and local authority services. She is a guest lecturer on 6 postgraduate and doctoral Psychology courses across the UK, teaching on LGBTQ+ mental health and intersectionality.

Jess has a BA in International Relations from University of Leeds, an MA in Applied Human Rights from University of York and an MSc in Psychology from University of East London. Jess is currently an Assistant Psychologist with Harrison Psychology Group and the Tavistock & Portman NHS Trust Gender Identity Development Service.