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Our Team/Therapists

Experienced and compassionate psychologists and social workers.

Crookes Counselling and Consulting Services have an experienced team of psychologists and social workers who are dedicated to providing effective, practical and constructive psychological intervention.

All of our psychologists are fully registered and accredited.

All our Practitioners deal with Depression and Anxiety issues as well as specialising in many other areas of Mental Health.

Choosing a Psychologist or Social Worker.

What the difference is? Both Psychologists and Social Workers have university degrees and as part of their registration are required to attend ongoing professional development training. All our team of counsellors are highly qualified with many years of experience and specialise in many different areas.

We recommend you call our friendly reception staff, who are trained with the knowledge of counsellors specialities and will assist you in making a decision on which of our psychotherapists would best suit your needs.

Jill Crookes – Company Founder. Non- Practising Psychologist. Resilience Coach


  • Bachelor of Science (Honours)
  • Graduate Certificate in Health Studies (Loss and Grief)
  • Member – Australian Psychological Society (APS)
  • Member – APS College of Counselling Psychologists

Areas of Special Interest:

  • Trauma, loss and grief
  • Workplace stress, injury and illness
  • Resilience Coaching - personal and organisational

Jill continues to be involved in over-seeing the running of the business and in supporting staff & Associates.

Following a UK study tour in 2004, Jill also founded Wombat’s Wish, a community-based grief support program for children, adolescents and families where a parent or primary carer has died.

Jill has retired from providing psychological counselling and will no longer attend critical incidents or debriefs.

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Anthony Stott - Principal Psychologist


  • Bachelor of Science (Biology)
  • Diploma of Education
  • Bachelor of Theology
  • Graduate Diploma of Computing
  • Master of Counselling Psychology
  • Member – Australian Psychological Society (APS)
  • Associate Member – APS College of Counselling Psychologists

Areas of Special Interest:

  • Registered with the ATAPS program
  • Pain management
  • Couples Counselling
  • Drug and alcohol

Anthony has worked in a number of different fields such as teaching, youth work, and training unemployed people. He was a Lifeline counsellor for 5 years and has been in private practice since 2008.

Days available: Monday- Friday. After hours appointments on Thursday.

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Sarah Gale - Psychologist - Commencing Maternity Leave Mid September 2017


  • General Psychologist Registration (AHPRA)
  • Associate Member of the Australian Psychological Society (APS)
  • Working with Children Check
  • AHPRA Psychology Internship
  • Bachelor of Behavioural Sciences (Honours)
  • Member - Australian Association for Cognitive and Behaviour Therapy

Areas of Special Interest

  • Relationship difficulties
  • Self-esteem issues
  • Bullying and workplace related stress
  • Psychiatric problems (mood disorders, anxiety, adjustment difficulties, psychosis, obsessive compulsive disorder)

Sarah embraces a solution focused approach towards assisting people to achieve psychological and emotional health. Not only has she developed considerable experience in private practice, but she has accrued extensive experience working within university, community and hospital based settings. As such, she offers expert services in the assessment and treatment of a range of psychological disorders and syndromes for adults and adolescents.

Sarah has also worked with individuals seeking to enhance their psychological wellbeing by helping them to discover ways to improve their self-esteem, manage overwhelming emotions, manage stress, communicate effectively, improve their relationship with significant others and also create a rich, full and meaningful life in accordance with their values.

In addition to her clinical work, Sarah is also passionate about advocating for her clients and has extensive experience preparing psychological assessment and court reports for Victims of Crime and WorkCover.
Sarah utilises a number of empirically-proven treatment approaches to guide her work including Cognitive Behavioural Therapy (CBT), Acceptance and Commitment Therapy (ACT), Mindfulness and Schema Therapy.
Sarah is a registered provider as a Psychologist with Medicare, TAC, WorkCover, Victims of Crime and most Private Health Insurers.

Days available: Friday


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Gregory Riddett - Accredited Mental Health Social Worker


  • Bachelor of Social Work (Honours, Sociology Major)
  • Member – Australian Association of Social Workers
  • Member – Australian Men’s Health Forum

Areas of Special Interest:

  • Family/Domestic Violence; (including Gay, Lesbian, Bisexual and Transgender) and civil/social
  • Adolescent Self-Harm
  • Pre court assessment and treatment of behavioural issues (includes appeals)
  • Court mandated behaviour change e.g.; criminal and child protection
  • Anger deconstruction and prevention
  • Biographical debriefing
  • Complex bio-psychosocial issues
  • Psychosomatic Illnesses
  • Chemical Sensitivity
  • Emotionally reactive behaviour 



For over three decades, Gregory Riddett has worked in both Health and Welfare and earned international recognition for his work in the field of understanding how Emotions dictate Choice and Behaviour. Gregory’s work in this area culminated in him being invited to London England in 2008 for the Launch of Dame Carol Black’s Review of the health of Britain’s working age population, “Working for a Healthier Tomorrow”. Gregory has a Bachelor of Social Work (Hons), is an Accredited Mental Health Social Worker, Clinical Health Sociologist, Medicare and EAP Provider.

 Gregory has studied conventional western and eastern approaches to understand human behaviour and behaviour change at the level of Arhatic Yogi. Gregory is an Accredited Stillness Meditation Therapy (SMT®) Teacher and Practitioner. Gregory is a socially conscious individual, social interpreter and mentor to those who wish to transform their lives by understanding the power of their emotions and their thoughts.

 Gregory regularly presents at health and mental health conferences in Australia and overseas. In addition he has lectured at university level on the Power of Emotions and Counselling. He has written several approaches and theories used in counselling and psychotherapy. The two most notable are Emotional Choice Theory© and Biographical Debriefing©. Gregory has both written and delivered anti-violence training to staff employed in both federal and state government health and welfare agencies. In addition Gregory has a strong interest in and extensive experience working with both victims and perpetrators of family violence.

 Days available: Monday - Thursday & Saturday. After hour appointments available.

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Betty Gurovski - Psychologist


  • Bachelor of Arts (Psych)
  • Post Graduate Diploma (Psychology)

Areas of Special Interest:

  • Couples counselling
  • Stress management
  • Trauma

Days available: Tuesday & Thursday

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Norm Morris - Psychologist


  • Bachelor of Arts (Psychology)
  • Graduate Diploma in Vocational Counselling
  • Graduate Diploma in Criminology

Areas of Special Interest:

  • Trauma, loss and grief
  • Work related injury and disability
  • Sleep
  • Hypnosis
  • Adjustment

Days available: Tuesday- Friday. After hours appointments on Thursday.

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Kimberley Muraca - Psychologist


  • Bachelor of Applied Science (Psychology)(Honours)
  • Master of Psychology (Counselling)

Areas of Special Interest:

  • Trauma
  • Drug and Alcohol
  • Anger Management

Days available: Tuesday afternoons.

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Marie-Claire McCubbery - Psychologist

Sees adolescents 12 years & up


  • Bachelor of Arts (Psychology / Spanish)
  • Post Graduate Diploma of Psychology
  • Masters of Counselling Psychology
  • Member - Australian Psychological Society (APS)
  • Working With Children Check

Areas of Special Interest:

  • Registered with the ATAPS program.
  • Relationship Difficulties
  • Anxiety and Depression
  • Trauma and Abuse
  • Work-related Bullying and Stress
  • Life Transition Difficulties
  • Parenting Issues
  • Adjustment Difficulties, Grief and Loss


Marie-Claire McCubbery is a Counselling psychologist and works with adolescents, adults and couples to support and assist them in finding their way through a broad range of issues including anxiety related difficulties, depression, stress, relationship issues and life transition difficulties.

Using a person-centered approach, Marie-Claire works collaboratively with the individual needs of each client to increase their self-awareness and facilitate change in behaviour, entrenched thinking patterns and more deeply ingrained emotional difficulties. She draws from a range of therapy models including Cognitive Behavioural Therapy (CBT), Mindfulness, Commitment Therapy (ACT), Emotion Focus Therapy, Attachment Therapy and Schema Therapy.

In addition to being registered with Medicare Marie-Claire is a registered provider to TAC, Work Cover and Victims of Crime. She can also conduct counselling sessions in Spanish if requested.

Days available: Tuesday mornings, Wednesday & Friday. After hours appointments on Wednesday & Friday.

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Briony Owen - Psychologist



  • General Psychologist Registration (AHPRA)                           
  • Associate Member of the Australian Psychological Society                   
  • Senior First Aid Accredited - work place level 2                                      
  • Working with Children Check                                                     
  • AHPRA Psychology Internship              
  • Graduate Diploma in Professional Psychology
  • Graduate Diploma in Psychology
  • Graduate Diploma in Psychological Studies                                           
  • Bachelor of Applied Science, Human Movement/Psychology    

Areas of Special Interest:

  • Sex Therapy
  • Relationship & Marriage Counselling
  • Grief Therapy, Children & Adults
  • Working with Children & Adolescents
  • Eating Disorder Management
  • Chronic Illness Management
  • Stress Management


Briony is a registered Psychologist who embodies a patient focussed mindfulness and cognitive behavioural approach. Briony is passionate about assisting people to achieve their maximum psychological health and emotional wellbeing. Her special interests include sex therapy, which with care privacy and understanding, Briony can assist individuals and couples of all ages through sexual, marital and general relationship difficulties. Briony has also spent time at The Royal Children’s Hospital and in schools working with children and adolescents to improve their self-esteem, stress levels, and communication skills. Briony will provide support, strategies and encouragement for children and their families; counselling parents to be supportive, yet firm and encouraging responsibility and mastery in the child. Briony has also worked with children, adolescents and adults on coping with grief, life transitions, chronic illness and eating disorders.

Days available: Thursday & 2nd Sunday of each month.

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Debi Hamilton - Psychologist


  • Bachelor of Arts (ANU)
  • Grad Dip Counselling (RMIT)
  • Member of Australian Psychological Society (APS)
  • Member of APS Counselling College

Areas of Special Interest:

 Areas of special interest include:

  • Registered with the ATAPS program.
  • anxiety - including panic attacks, phobias, social anxiety
  • trauma/abuse
  • sleep difficulties
  • WorkCover injury/rehabilitation
  • life transitions - post-natal depression, menopause, retirement
  • prostate cancer treatment



Debi Hamilton is a registered counselling psychologist with more than 20 years' experience in private practice. Her work is individually tailored, practical and thoughtful.  Debi has worked extensively with people suffering from trauma - including work-related and accident trauma - and abuse, particularly sexual abuse.  Her experience in these areas has helped her to develop a gentle but focussed approach, using a range of  therapeutic techniques in close consultation with the client.


Anxiety in all its manifestations is another area in which Debi has many years of experience.  She works with people experiencing a range of conditions, from phobias, social anxiety and obsessive-compulsive disorders through to trauma-related arousal.


Debi also has experience working with men (and their partners) following prostate cancer treatment.  She is able to assist with the grief and psychosexual adjustment that can often follow changes in erectile functioning.

Days available: Tuesday.

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Marita Mercer - Psychologist

Sees children from 5 years & up


  • Masters Degree in Child and Family Psychology
  • Bachelor of Social Science (Hon) Majoring in Psychology
  • Associate Member- Australian Psychological Society (APS)

Area of Special Interests:

  • Depression and anxiety
  • Children's Behaviour and Learning Issues
  • Pre/Post Natal Issues
  • Trauma
  • Supervision of Psychologists
  • Grief and Loss
  • Stress
  • Adjustment Issues

Marita has 14 years' experience as a therapist. Marita has worked in a broad range of community settings and schools, as well as community health and private practice.

Provides Services to: 
Children, Adolescents. Adults and Families

Marita employs a range of techniques such as behaviour modification, art and sand play therapy, and miniature animals - with the goal of making a lasting impression. 
Marita is committed to working alongside clients using various best practice psychological approaches to discover the best possible outcome for the client.

Days available: Monday, Wednesday, Thursday & Friday.

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Mariska van Vilsteren - Psychologist


  • General Psychologist Registration (AHPRA)
  • Working With Children Check
  • AHPRA Psychology Internship
  • Bachelor of Science (Psychology) - The Netherlands
  • Master of Science in Clinical and Developmental Psychology - The Netherlands

Areas of Special Interest:

  • Depression and anxiety
  • Trauma, including survivors of childhood abuse and neglect
  • Family and parenting issues
  • Child and adolescent mental health
  • Pre- and post-natal issues


During her psychology studies in The Netherlands, Mariska was predominantly trained in cognitive behavioural therapy, but also embraces other frameworks such as psycho-dynamic counselling, schema therapy and acceptance and commitment therapy (ACT), based on the client's needs and presenting issues. Mariska finds it very important to work with a client-centred, trauma-informed and mindfulness based approach to increase personal and family wellbeing.

Before moving to Australia in 2010, Mariska worked in The Netherlands as a psychologist assessing children with language, hearing and/or developmental issues. After arriving in Melbourne, Mariska worked as a Family Counsellor with complex, isolated and disadvantaged families in a community organisation in the western suburbs. This is where she gained substantial experience in working with clients who have been faced with childhood abuse and neglect and related attachment issues.

Mariska is passionate about counselling children, young people, families and adults in a way that is supportive, family oriented, practical, and tailored to the client's needs.

Days available: Monday mornings & Wednesdays.

Dr Mandy Cassimatis - Clinical Psychologist


  • BA (Psychology)
  • Postgraduate Diploma (Psychology)
  • Master in Clinical Psychology
  • PhD
  • AHPRA Endorsement: Clinical Psychology
  • Member of Australian Psychological Society (APS)

Areas of Special Interest:

  • Chronic disease adjustment and self-management issues
  • Mood disorders (depression, anxiety disorders)
  • Stress management
  • Self-esteem issues
  • Body image issues
  • Behavioural self-management (e.g. addiction, weight management, lifestyle balance)
  • Trauma (including victims of crime and car accident victims)
  • Family therapy

Mandy is a Clinical Psychologist with experience treating a range of mental health conditions in an individual and group therapy format. She has a particular interest in treating clients across the lifespan with chronic disease adjustment, self-management and/ or emotional difficulties due to her research background in designing and developing programs in this area. She also enjoys treating depression, anxiety disorders (including generalised anxiety, specific phobias and social anxiety) and trauma (including victims of crime). Mandy uses approaches including cognitive behavioural therapy, schema therapy, acceptance and commitment therapy, and cognitive processing therapy according to the client’s needs.

Days available: Monday,Thursday, Friday & Saturday. Evening appointments available Thursday & Friday.

Kathryn White (formerly Kathryn Lyall) - Psychologist


  • Master of Psychology (Health)
  • Bachelor of Behavioural Sciences (Honours)
  • Registration with the Psychology Board of Australia / AHPRA
  • AHPRA endorsement: Health Psychology
  • Member of the Australian Psychological Society (APS)
  • Member of the APS College of Health Psychologists

Areas of Special Interest

  • chronic disease self-management
  • chronic pain management
  • sleep difficulties
  • life stage transitions
  • working with older people.

Kathryn is a health psychologist working with adults and older adolescents. She has experience working in a variety of environments, including community health and crisis counselling. She works from a person-centred perspective, drawing largely on Cognitive Behavioural Therapy (CBT) and Acceptance and Commitment Therapy (ACT).

Days Available Wednesday, Thursday Evenings and every 2nd Saturday.

Emily Aylett - Psychologist


  • Bachelor of Arts, First Class (Hons) Degree in Psychology
  • Master of Sciences Degree in Educational Psychology
  • Professional Certificate in Cognitive Behavioural Therapy

Area of Special Interests:

  • Depression.
  • Anxiety Disorders – OCD, PTSD, General anxiety, School Phobia.
  • Developmental Learning Issues, e.g. Autism Spectrum Disorder, Intellectual Disabilities.
  • Child and Adolescent Mental Health.
  • Attachment Difficulties.
  • Work and family related stress.
  • Supporting survivors of abuse and violence.
  • Promoting resilience and wellbeing.

Emily has over 7 years of experience working with children, adolescents and their parents in employment as an Educational Psychologist in the UK and Australia, both in schools and the community. Emily has also worked with adults experiencing work related stress and family violence issues. Emily believes in using a strengths based framework, looking at the factors which help any person cope with their situation. She draws from a range of therapy models including Cognitive Behavioural Therapy (CBT), and Solution-Focussed Brief Therapy. As a new mother, Emily has first-hand experience of the challenges associated with parenting and is eager to support other parents who are experiencing stressors in their lives which are impacting on their wellbeing.   

Days Available Monday and every second Saturday.

Vicki Colosimo - Qualified Social Worker


  •   Bachelor of Health Science
  •   Bachelor of Social Work 
  •   Diploma of Alcohol and other Drugs
  •   Specialist Course in Couple Therapy
  •   Certificate in Supervision 
  •   Leading, Managing and Supervising

      Vicki is a qualified Social Worker who has been supporting individuals and families for more than fifteen years. She has extensive experience working in the not-for-profit sector in several well-known organisations in Melbourne. As an independent counsellor, Vicki enjoys working with people from a holistic approach where the client’s needs are at the centre of her practice. As an experienced practitioner there are many areas that Vicki can assist with.

      Some areas of specialization include the following:

      • Relationship counselling (for individuals and couples)
      • Health and wellbeing
      • Stress management 
      • Enhancing performance in sport 
      • Clinical/External supervision for workers

       Days available:   Monday afternoons/evenings & Wednesday evenings

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      Our philosophy... To assist clients to enhance their wellbeing,
      build life skills and fulfil their potential.