Dr Bernadette Bywater

MAPSLife Coach/Clinical Psychologist

At SIOS Bernadette provides assessment and support for patients before and after surgery. Bernadette brings to the role specialist experience in providing treatment for eating disorders, body image issues and weight loss. Her doctoral research was in the area of depression, coping style and perfectionism in people who are overweight.

Bernadette is trained in the use of a range of scientifically supported therapies including Motivational Enhancement Therapy, Cognitive Behavioural Therapy and Acceptance and Commitment Therapy. Bernadette also provides treatment for a range of difficulties including anxiety, depression, stress and life transitions.

Qualifications & Professional Memberships

Doctorate in Clinical PsychologyUniversity of Birmingham, England

Diploma in Eating DisordersNational Centre for Eating Disorders, England

Post Graduate Diploma in PsychologyMacquarie University

Bachelor of Arts (Psychology)Macquarie University

Bernadette is a fully registered Psychologist with the NSW Psychologists Registration Board (2002, Registration No.0069732). She is also a member of the Australian Psychological Society (APS, Membership no. 034478) and a member of the Clinical College of the APS.

Dr Bianca Petrie

MACPALife Coach/Clinical Psychologist

At SIOS Bianca provides assessment and psychological treatment for patients before and after surgery. She has a special interest in the relationship between the mind and the body, including the function of eating in emotion regulation and the ways in which psychological issues can manifest as pain or other physiological symptoms.

Bianca’s approach is warm, open and non-judgemental. She has great respect for those who make the decision to actively improve their psychological and physical health, and works to provide a supportive and empathic environment which encourages insight, growth and positive change.

In addition to her clinical work, Bianca has undertaken honours level research into the relationship between social information processing and physical and verbal aggression, and master’s level research into the structure of the self-concept and its relationship to mood, self-esteem, perfectionism and procrastination. She received the Chancellor’s Award for Research Excellence and the University Medal for her honours research, and a University Postgraduate Award Scholarship to undertake her master’s research.

Bianca is trained in a variety of scientifically-supported therapies, including Cognitive-Behavioural Therapy, Mindfulness-based Therapies, Motivational Enhancement Therapy, Solution-Focused Brief Therapy and Smoking Cessation Therapy. She has experience helping patients in a variety of areas and offers treatment for eating disorders and health-related issues, depression and anxiety, addictions and relationship issues.


Doctorate of Clinical PsychologyUniversity of Sydney

Master of ScienceUniversity of Sydney

Master of Health Information ManagementUniversity of Sydney

Bachelor of Arts (Honours)University of Newcastle

Bianca is a fully registered Clinical Psychologist (Registration Number: PSY0001373375) and a member of the Australian Clinical Psychology Association (ACPA; Membership Number: 355).

Marie-Lisa Boukarim

Life Coach/Clinical Psychologist

At SIOS Marie-Lisa provides assessment and support for patients before and after surgery. Marie-Lisa is a very warm and understanding therapist, who is trained in the use of scientifically supported therapies including Cognitive Behavioural Therapy and Motivational Enhancement Therapy. She is skilled in tailoring her therapeutic approach to suit the individual needs and goals of the client.

Marie-Lisa’s background as a sport coach and fitness leader has inspired her particular interest in eating disorders, obesity and weight management difficulties.

In addition to her clinical work, Marie-Lisa has conducted Honours level research focused on attention and memory deficits during pregnancy. She has also conducted Masters level research exploring sleep disturbance in older adults with late-onset depression.

Marie-Lisa has experience working with a range of psychological disorders and offers treatment for various difficulties including health related disorders, anxiety, mood and adjustment issues.

Qualifications and Professional Memberships

Masters in Clinical PsychologyUniversity of Western Sydney

Bachelor of Arts-Psychology (Honours)Macquarie University

Marie-Lisa is a fully registered Psychologist with the NSW Psychologists’ Registration Board (Registration No. PS0119442), and is a member of the Australian Psychological Society (APS Member No. 026787).

Rhyll Davey

BA (Hons) Psychology, MPsych (Org), MClin Counselling

Registered Psychologist

Rhyll is a registered Psychologist (Registration No. 0001288202).  She is a member of the Australian Psychological Society (APS, Membership No. 183370). Registered since 2004, she has experience in clinical counselling, vocational counselling and training within the commercial, higher education and non-government sectors.

Rhyll offers treatment for adults in the following areas:

  • Anxiety and Stress
  • Depression and low mood
  • Substance misuse and addiction
  • Weight loss and body image
  • Trauma and post-traumatic stress
  • Grief and loss
  • Anger management
  • Emotional regulation issues
  • Relationship and parenting issues
  • Adjustment to life transitions or major life events

Rhyll aims to provide a space where people can open up in a safe place.  Using her knowledge, she can assist people with issues that may be holding them back.  A strength of Rhyll’s is her caring and calm approach.  She is committed to improving her client’s resilience and making connections with what is important in their lives.

Therapeutic models include:

  • Cognitive Behaviour Therapy (CBT)
  • Acceptance and Commitment Therapy (ACT)
  • Motivational Enhancement Therapy
  • Interpersonal Therapy
  • Solution Focused Brief Therapy


Master of Clinical Counselling
Australian Catholic University

Master of Psychology (Organisational)
University of New South Wales

Bachelor of Arts (Psychology)(Honours)
University of Newcastle

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