Shop 1/1B Coulson Street
Erskineville NSW 2043
View Directions
Diverse Minds Map
02 9519 1519

Team Profiles

Steve Den-Kaat

MSc (Psych) PGDip (ClinPsych) FCCLP

Clinical Psychologist – Clinic Director

Steve is the clinic director and supervisor of the team.  Steve obtained his MSc (psych) from Victoria University of Wellington, with his research in the field of Autism Spectrum Conditions ( He completed his clinical training under the supervision of Professor Tony Attwood, Dr Michelle Garnett and Dr Hui Keow Lim.

Steve is a clinical psychologist who has a keen interest in working with adolescents with complex challenges including: attention deficit hyperactivity disorder, conduct disorder, eating disorders, anxiety, and depression. Steve’s main area of specialty is in the area of Asperger’s Syndrome and autism spectrum conditions.

Steve has provided diagnostic services and therapy in response to varying psychological needs. He has worked alongside children, adolescents and adults across the autism spectrum. In addition, Steve has presented across Australia and internationally in the area of autism spectrum conditions, with a focus on self-Identity and self-esteem.

Dr Ramona Toscano Callus

(currently on Maternity Leave)

BPsych (Hons), DClinPsych, MAPS

Clinical Psychologist – Clinic Director Child Services

Ramona completed a Bachelor of Psychology (Hons) at the University of Malta and a Doctor of Clinical Psychology at Macquarie University in Sydney. Ramona’s doctoral research focused on the assessment of anxiety in children and adolescents with anxiety disorders and Autism Spectrum Disorder (ASD).

Ramona trained as an ABA (Applied Behaviour Analysis) therapist and worked with children and adolescents with autism and their families. Her work involved the design and implementation of Early Intervention programs, parent training and consultation with school and multidisciplinary teams. Ramona also worked at the Emotional Health Clinic, Macquarie University where she conducted assessments and provided treatment of anxiety and mood disorders in children and adolescents. During her training and clinical work, Ramona has gained experience in providing assessment as well as individual and group treatment for children, adolescents and adults experiencing a range of difficulties including anxiety, depression, autism and ADHD.

Ramona is passionate about helping individuals lead healthy and fulfilling lives and is committed to utilising evidence based, scientifically effective treatments, including Cognitive Behaviour Therapy (CBT), Acceptance and Commitment Therapy (ACT) and Mindfulness-based CBT.

Dr Sally Clifford

BPsych (Hons) MPsych (Clinical) PhD (Psychology, Autism Spectrum Disorders)

Clinical Psychologist

Dr Sally Clifford has a Masters degree in Clinical Psychology and a PhD in Autism Spectrum Disorders (ASD, Link 1; Link 2).Sally researched ASD at a post-doctoral level with University College London, the Autism Research Centre at Cambridge University and for the British Autism Study of Infant Siblings at Birkbeck University of London (Link 3; Link 4; Link 5). Sally was later involved in evaluating parenting programs  at King’s College London (Link 6).  Sally has considerable experience in the diagnosis and treatment of children, adolescents and adults with ASD, having spent the last 16 years researching and working clinically in the area.

Sally’s experience involves working with children and their families, and she is a training parenting practitioner (Triple P provider). Sally has also worked in the area of conduct and oppositional problems (using Multisystemic therapy), eating disorders, anxiety, social phobia, depression, anger management, bullying, and Social Skills Training. Sally uses a range of strategies including Behaviour Therapy, Cognitive Behavioural Therapy, Social Skills Training, and Acceptance and Commitment Therapy. Sally works collaboratively and creatively with families and enjoys fun and dynamic sessions.

Dr Hugh Walker

BA Psych(Hons I) DPsy(Clinical) MAPS

Clinical Psychologist – Clinical Lead of Adolescent and Adult Services

Hugh completed a Bachelor of Arts majoring in Psychology with first class honours from Macquarie University in 2010 and completed a Doctor of Psychology (Clinical Psychology) at The University of Queensland from 2013 to 2016. Hugh has worked in a variety of mental health settings including public hospitals and private practice across the age ranges of children, adolescents, adults, and older adults since 2013. Hugh is a board-approved supervisor for registered psychologists.

Hugh has a general interest in neurodiversity, with a specific interest in the assessment of autism spectrum conditions and therapy to reduce social and emotional challenges associated with autism. Hugh has been working in the field of autism-spectrum conditions since 2011. He was supervised by Dr Michelle Garnett and Professor Tony Attwood at the Minds and Hearts Clinic during his post-graduate training in Brisbane. He was supervised by Steve Den-Kaat during his clinical psychology registrar program. He completed a Graduate Certificate of Autism Diagnosis at the University of Western Australia and completed a placement with the Child Development Unit at The Children’s Hospital at Westmead. He completed his doctoral thesis examining a caregiver-directed version of the Secret Agent Society Program for families in remote areas which can be viewed here.

Hugh completes diagnostic assessments for adolescents, young adults, and older adults who are seeking to gain an understanding of their present challenges, past history, and plan forward. Particularly if the possibility of an autism-spectrum condition has been raised. Hugh understands mental well-being as the product of biological, psychological, social, and environmental factors and he is happy to collaborate treatment plans with other health professionals. Hugh’s main therapeutic method is Cognitive-Behaviour Therapy (CBT) which is the most scientifically-supported form of therapy. CBT relates to modifying behaviours and reprogramming unhelpful thinking styles that could be keeping one stuck. He also uses other methods such as Mindfulness Training, Acceptance Commitment Therapy, Dialectical Behaviour Therapy Skills, Social Skills Training, and Motivational Interviewing in collaboration with clients and when the current empirical evidence supports it. While Hugh is trained to assess and treat mental health conditions generally, he has a developed a particular interest in the treatment of panic disorder, obsessive-compulsive disorder and selective-mutism.

Genevieve Fyfe

BSc (Psych) Hons, MClinPsych Clinical Psychologist, MAPS, MACPA

Clinical Psychologist

Genevieve qualified for her Masters degree in Clinical Psychology at Macquarie University. She has experience in the assessment and treatment of children, teens and adults and anxiety disorders and providing treatment to individuals experiencing social and emotional challenges associated with an autism spectrum diagnosis.

Genevieve has worked in university psychology clinics as well as in-patient psychiatric facilities and private practice. She enjoys collaborating with clients on treatment goals that enhance the lives of each client in ways that matter to that particular client.  Genevieve uses Cognitive and Behavioural Therapies as well as Acceptance and Commitment Therapeutic approaches. Genevieve has researched the causes of early adolescent bystander inaction in response to bullying, and cognitive techniques that significantly increase the effectiveness of psychological treatment. Prior to her work as a psychologist, Genevieve worked as a Human Resources Manager in the corporate world and consulted on organizational skills development and organizational change.


Katherine Watson

B.Soc Sci(Psychology)(Honours), MClinPsych. MAPS

Registered Psychologist

Katherine holds a Master of Clinical Psychology from Macquarie University. During her training she worked with children, adolescents and adults affected by anxiety, depression, ADHD, behavioural challenges and chronic health conditions. She also gained experience working with children and adults who experience challenges associated with an autism spectrum diagnosis, providing assessments as well as individual and group therapy.

Katherine uses Cognitive Behavioural Therapy (CBT), Acceptance and Commitment Therapy (ACT) and Mindfulness Based Interventions, including Mindfulness-Based Cognitive Therapy (MBCT). She facilitates mindfulness group programs including a Mindful Parenting course for parents of neuro-diverse children. She has also run the Cool Kids Anxiety Program, the Secret Agency Society (SAS) social skills course, and co-facilitated the PEERS social skills program at Diverse Minds.

Prior to training as a psychologist, Katherine worked for an NGO providing psycho-social support for patients, carers and their families affected by a cancer diagnosis. She continues to have an interest in working with people affected by chronic illnesses such as asthma, diabetes and cancer.

Scarlett McCarthy

BPsychSc, BA(Hons)Psy, M.Clin Psych

Clinical Psychologist 

Scarlett completed a Bachelor of Psychological Science at Monash University and a Bachelor of Arts (Honours) Psychology at Western Sydney University with first class Honours. Scarlett also completed her training in Applied Behaviour Analysis and worked as an ABA therapist providing early intervention for children on the autism spectrum throughout her honours and clinical training.
Scarlett completed a Master of Clinical Psychology at the University of Technology Sydney and has gained experience at university clinics as well inpatient and outpatient services. During her clinical training, Scarlett completed placements at the UTS Psychology Clinic, Diverse Minds Psychology Clinic and The Sydney Clinic (inpatient care). Scarlett has worked with individuals across all ages to provide evidence-based treatment to a range of concerns and challenges.
Scarlett aims to work within the therapeutic approach which best suits the client’s needs; this includes Cognitive Behavioural Therapy (CBT), Acceptance and Commitment Therapy (ACT) and Dialectical Behavioural Therapy (DBT). Scarlett is trained to deliver the Secret Agent’s Society (SAS) social skills group program and is experienced in running the PEERS Social skills program for teens and for young adults here at Diverse Minds. Scarlett is interested in working with females on the autism spectrum as well as young children through to young adults who are on the autism spectrum.

Karen Gould

BA (Psych) Hons, MClinPsych, MResPsych, Registered Psychologist, MAPS

Registered Psychologist 

Karen completed her Masters of Clinical Psychology and Masters of Research degrees at Macquarie University. During her training she worked across the lifespan with clients from young children to older adults affected by anxiety, depression, ADHD, autism spectrum disorder, bipolar disorder and schizophrenia, providing individual and group therapy. Karen has worked with individuals on the autism spectrum since 2014 in both clinical and research settings. Karen has an additional interest in supporting the emotional wellbeing of individuals with Attention-Deficit/Hyperactivity Disorder, a condition that often occurs along with anxiety and low mood. Karen has published her research on ADHD, including the treatment of co-occurring anxiety, in peer-reviewed scientific journals ( She has also facilitated group-based therapy assisting adults with ADHD to improve their quality of life.
Karen uses Cognitive Behavioural Therapy, Interpersonal Psychotherapy and Acceptance and Commitment Therapy approaches, and is trained in delivering the Cool Kids Anxiety Program and Collaborative and Proactive Solutions (CPS). She strives for a warm and non-judgemental therapeutic approach and greatly enjoys working with clients from a diverse range of backgrounds.

Simone Hain

BSc (Psych) Hons, MClinPsych & PhD Candidate

Registered Psychologist

Simone completed a Bachelor of Science (Psychology) with first class Honours at The University of Sydney and is currently finalising a Master of Clinical Psychology at Macquarie University in Sydney. She is also studying towards a PhD degree at Macquarie University, researching phobias and emotions, including how phobias are acquired and established in childhood.

Simone is a trained ABA (Applied Behaviour Analysis) therapist and has been working with children with Autism Spectrum Disorder (ASD) and their families since 2013. She also worked at the Centre for Emotional Health, assessing emotional wellbeing in children and adolescents. During her training, she worked across the lifespan, providing assessment as well as individual and group therapy for a range of conditions such as anxiety, depression, ADHD, ASD and behavioural and social skills problems.

Simone has been working at Diverse Minds since July 2018, providing individual therapy and facilitating social skills groups. She is passionate about creating a warm and collaborative environment that enables children and their families to gain skills to improve their quality of life. Simone utilises evidence-based therapies such as cognitive-behavioural therapy (CBT), acceptance and commitment therapy (ACT) and/or mindfulness based treatments.

Grace Kouvelis

BA Psych (Hons), MPsych (Clinical)

Clinical Psychology Registrar 

Grace completed a Bachelor of Arts (Psychology and English) and Honours degree in Psychology from the University of Sydney and a Master of Clinical Psychology degree from Macquarie University. Grace has also received training in Applied Behaviour Analysis (ABA) and worked as a junior ABA therapist assisting children with Autism Spectrum Disorders (ASD). Grace’s research through her Master of Clinical Psychology degree was within the psycho-oncology field, focusing on the impact of how previous interpersonal trauma can impact how individuals, with or without a history of cancer, self-identify.

Grace is a warm and empathetic therapist who is passionate about supporting young people, adults and families with various presenting concerns, such as depression, anxiety, and relationship difficulties. Grace’s interest is in supporting clients through life transitions and cultural conflict from her experience in university psychology clinics and a therapeutic service for young adults.

Grace completed her final clinical placement under the supervision of Dr Hugh Walker and Steve Den-Kaat at Diverse Minds, which focused on delivering individual and group therapy to individuals with an Autism Spectrum Disorder. Grace utilises a range of evidence-based interventions, such as Cognitive Behavioural Therapy (CBT), Acceptance and Commitment Therapy (ACT) and Motivational Interviewing (MI). In all treatments, she is passionate about working collaboratively with clients in order to identify and work towards their goals.


Chloe Marshall

BA (Psych/Hlth), PGD (Psych), MPsych (Ed&Dev), MAPS

Educational & Developmental Psychology Registrar

Chloe has a Masters degree in Educational and Developmental Psychology, which she completed through Monash University in Melbourne. Prior to this, she completed a Bachelor of Psychology and Health as well as a Postgraduate Diploma in Psychology.

Chloe worked in ABA (Applied Behaviour Analysis) for over six years, in a range of settings, her work including creating, and implementing data-driven individualised intervention for children and adolescents with an Autism Spectrum Disorder and related disabilities. She also consulted with schools, worked with families in their homes and in the community and collaborated with other service providers to best support her clients. During this time Chloe also worked for a foundation that focuses on helping all children have the ability to play and access the community around them. She created programs for children and families to engage in and assisted with campaigning and writing grants for all-ability parks to be built across Australia.

Chloe also has experience working with individuals across the lifespan in multiple settings, utilising evidence based treatment such as Acceptance and Commitment Therapy, Cognitive Behavioural Therapy, and Mindfulness based therapies. She also enjoys implementing comprehensive psychometric assessments and being able to assist and support individuals and families during the process. Chloe has a particular interest in developmental delay and mental health in children and adolescents. She hopes to continue to assist individuals and their families with such challenges lead meaningful lives.


Julie Sipina

Clinic Manager

Julie is a busy mother of three who is very passionate about the health industry, having  owned and operated her own Medical Supplies business for many years where she refined her skills for health administration. She is well travelled and worked in Europe and Asia in Corporate and Executive Assistant roles for a number of years.

Her interests revolve around her family and she enjoys meditation, pilates, travel and entertaining with friends.

Julie is a warm, calm and understanding  person, who is always willing to listen and help with any challenges that may arise either with clients or personnel within the clinic. Julie looks forward to welcoming you at the Clinic and assisting you with any questions you might have.

Lise Potts

Senior Administrator

Lise is a cheerful and enthusiastic mother of two who has a passion for health and well being. Coming from England she has travelled and worked in various countries and eventually settled in Australia where she is now a Citizen. Since living in Australia she has gained extensive experience in customer service and administration work through many different roles. Her two daughters are in the NSW Girl Guides and she is a volunteer helper. She has a pleasant, friendly and understanding personality.

Rebecca Ross

Personal Assistant

Rebecca is an energetic mother of 3 active boys who enjoys being engaged and busy. Having studied and practised law for many years, Rebecca has embraced a change that allows her to work within a field that gives individuals and families access to services that can make a real difference to their lives. While her 3 boys keep her very busy with various weekend sporting activities, in her spare time she enjoys exploring the great outdoors and engaging with friends. Rebecca is always ready and willing to listen.