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

BPsych (Hons), DClinPsych, MAPS

Clinical Psychologist

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

Currently on Maternity Leave

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). Sally researched ASD at a post-doctoral level with the University of London and the Autism Research Centre at Cambridge University, and additionally evaluated parenting programs at King’s College London. Sally has considerable expertise in the diagnosis and treatment of children, adolescent and adults with ASD, having spent the last 13 years researching and working clinically in the area.

Sally’s expertise involves working with children and their families, and she is a trained 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

Hugh completed a Bachelor of Business Administration with Bachelor of Arts majoring in Psychology with first class honours from Macquarie University from 2005 to 2010. After working for two years as a receptionist, research assistant, and disability support worker for Autism Spectrum Australia (ASPECT), he began postgraduate training in clinical psychology at the University of Queensland from 2013 to 2016.

During his clinical training Hugh completed internships at the UQ Psychology Clinic, UQ Child and Family Parenting Centre, Prince Charles Hospital, The Royal Brisbane and Women’s Hospital and Minds & Hearts Clinic where he was later employed. He has worked with clients from across the lifespan and with a broad range of psychological, developmental and behavioural concerns. His doctoral thesis examined the effectiveness of a caregiver-directed version of the Secret Agent Society Program for children with an autism-spectrum condition and was supervised by Associate Professor Kate Sofronoff and Dr Renae Beaumont View thesis here. He was awarded the Student Prize in Clinical Psychology at UQ for his graduating year.

Across his training and professional development Hugh has completed training in a range of evidence-based therapies including Cognitive Behavioural Therapy, Acceptance and Commitment Therapy, Dialectical Behaviour Therapy, Emotion Focussed Therapy, and Social Skills Training. He is an accredited provider of the Triple P Positive Parenting Program, The Secret Agent Society social and emotional skills program, and the Westmead Feelings Program.

Hugh has a specific interest in autism spectrum conditions across the lifespan and is passionate about evidence-based clinical practice. At the Minds and Hearts Clinic, in Brisbane he was supervised under Dr Michelle Garnett and Professor Tony Attwood from 2014 to 2016. He completed the Graduate Certificate of Autism Diagnosis through the University of Western Australia which included training in the Autism Diagnostic Observation Schedule (ADOS). He completed his clinical psychology registrar training under the supervision of Steve Den-Kaat.


Jennifer Beard

BA-Psych (Hons), BHlth, GDip(Family, Couples and Relationship Therapy) MAPS

Registered Psychologist and Relationship Therapist

Jennifer completed a Bachelor of Health and a Bachelor of Arts-Psychology (Honours) at Macquarie University in Sydney. She gained experience within specialist Autism Spectrum Disorder clinics, and genetic counselling organisations during this time, developing passion and empathy for supporting individuals and their families through diagnosis and beyond. Jennifer worked at Diverse Minds from 2013-2015 as a Provisional Psychologist under Steve Den-Kaat’s supervision. During this time she developed a wide variety of skills in therapy intervention and assessment.

Jennifer has worked as a Family Coach supporting the attachment relationship between parents and their young children, through providing mental health support, behavioural interventions and parenting or family systems interventions. She has completed a Graduate Diploma in Relationship Counselling (Couples and Family Therapy) and has joined the team again to provide support in this area.

Jennifer is a trained practitioner and facilitator of the Circle of Security Program, as well as being trained in Marte Meo (child and parenting development support). Jennifer is a trained facilitator of our Secret Agent Society program and has been involved in group therapy for a number of years now. Jennifer is passionate about working with couples and family groups to create positive bonds, and to provide effective communication and emotion management skills to repair and restore relationships. She aims to provide a warm, safe space to discuss current concerns or conflict and to explore previous family history and relational patterns. Jennifer utilises a Systemic Therapy approach, incorporating elements from Cognitive-Behavioural Therapy, Acceptance and Commitment Therapy Compassion Focused Therapy and Mindfulness-Based CBT.

Amanda Tiernan

BA (Psych) Hons, BHMS (Psych), MEd (Special Education/Counselling)

Registered Psychologist – Practising in Wollongong and Erskineville

Amanda is a registered psychologist, with combined 10 years of experience, having worked for both government and non-government agencies in disability, mental health and child protection sectors. She has completed a Bachelor of Human Movement Science (psychology major), and Bachelor of Arts-Psychology Honours at Central Qld University .  She followed this by completing a Master of Education (special education/counselling).

During her working life she has gained an extensive knowledge and understanding of attachment and trauma, as well as positive behaviour support . She has worked with both children and adults with developmental disabilities, including Autism Spectrum Disorders, as well as with adults with complex mental health needs. Her experience has included developing
behaviour support plans, assessment of functioning, mental health, behaviour, and IQ, as well as providing training on ASD, other Developmental Disabilities, Mental Health and positive behaviour support to direct care workers.

She currently also works part-time for Illawarra Community Mental Health where she is engaged  in many roles including working with clients who self-harm and have emerging personality disorder traits in the Gold Card Clinic (associated with University Of Wollongong Project Air strategy). She is passionate about using her knowledge of mental health to assist
people with dual diagnoses of developmental disability and mental health disability access the support they need.
Amanda is trained in a number of therapeutic approaches including Cognitive Behaviour Therapy (CBT), Dialectical Behaviour Therapy (DBT), Acceptance and Commitment Therapy (ACT), Trauma informed practice and therapy, and mindfulness practices. Amanda is very excited to be working at Diverse Minds-it has always been a dream of hers to eventually work in an ASD specific clinic. Perhaps one of her most valued achievement though is being mum to three young adult sons, two of whom are diagnosed with ASD level 1.

Genevieve Fyfe

BSc (Psych) Hons, MClinPsych Registrar Registered Psychologist

Registered 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 with anxiety disorders and more recently has gained experience 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 Acceptance and Commitment Therapeutic approaches.  Genevieve has researched the causes of early adolescent bystander inaction in response to bullying, and cognitive techniques thatsignificantly 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 organisational skills development and organisational 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 Cognitive Therapy (MBCT).  She is trained to deliver the Cool Kids Anxiety Program, and has assisted in facilitating the Secret Agency Society (SAS) social skills course, as well as 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. She also enjoys working with children and their families.

Nicole Langman

BA-Psych, BA- Psych (Hons), M-Psych (Clinical)

Registered Psychologist

Nicole completed a Bachelor of Arts – Psychology degree with first class Honours at Macquarie University. At this time Nicole began working alongside clinicians at Diverse Minds to support individuals on the autism spectrum, and developed a passion for working with individuals and families. Nicole was awarded the Professor Judyth Sachs PACE Prize Faculty of Human Sciences in 2012 for outstanding achievement on a research projectin the area of ASD undertaken at Diverse Minds. She also completed a research internship at the Emotional Health Clinic where she assisted in the collection of data and implementation of treatment programs for child and adult anxiety disorders.

Nicole has completed a Master of Clinical Psychology at the University of Sydney Technology and has gained experience in university clinics and community outpatient services. During her clinical training, she completed placements at the UTS Psychology Clinic, the Child Behaviour Research Clinic and the St George Chronic Pain Management Unit. She has worked with individuals across all ages in providing psychological treatment for a wide range of concerns.

Nicole is an empathetic clinician who is passionate about working collaboratively with individuals and families so that they may gain a greater quality of life. She has trained in cognitive behavioural, acceptance and commitment, and mindfulness-integrated treatment modalities. Nicole also has trained in the treatment of child emotional and behavioural difficulties utilising a family systems and attachment informed approach.

Robyn Weinstein

Appointments on Request

Speech Pathologist 

Robyn Weinstein qualified as a Speech Pathologist and Audiologist at the University of Witwatersrand in South Africa and in addition has a Diploma in Remedial Education.

Robyn has worked for over 30 years in the areas of the diagnosis and management of Autism Spectrum Disorders, Social Skill Difficulties, Speech (including Dyspraxia), Language & Literacy Development & Difficulties, Auditory Processing Disorders, Neuro-rehabilitation (including Traumatic Brain Injuries), and Rehabilitation of children with Hearing Losses. Ongoing education and attendance of various conferences, lectures, workshops and courses on current research and treatment methods is a priority for Robyn.Robyn is committed and passionate about working as part of a team, with families and most importantly the individual.


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.

Clare Mann

Accounts Manager

Clare has worked in the Health industry for several years with extensive experience in administration and management. Clare is the previous manager of Diverse Minds and has recently finished her maternity leave. Taking this time, while her children are young, Clare has taken over the role of Accounts Manager and will be running the clinic financial department while studying Bookkeeping. Clare is a mother to three young children and having recently moved to the Central Coast she loves being outdoors and spends all of her spare time exploring and being creative with them. Clare has empathy to all of our clients and is a friendly member of the team.

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.