About Us
Specialists In...
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Learning Difficulties
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Developmental Delays
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Attention Difficulties
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Oppositional and other Challenging Behaviours
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Emotional Disorders
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Autism Spectrum Disorders
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School Support and School Readiness
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Behaviour Support at Home and School
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Parenting Support
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Social Skills Development

Exceeding Expectations One Client at a Time
In 2017, Step by Step Interventions began to service clients in the North West Sydney area - offering them early intervention and allied health services to support families through their child's development.
Step by Step advocates for clients and engages with teachers, educators and other health professionals involved in your child's life. To make this as inclusive as possible, Step by Step offers onsite consultations and builds relationships with the wider community who support our clients.
Step by Step Interventions provides evidence-based intervention, assessments and recommendations so that you are equipped with the tools you need in order to tackle day-to-day life and provide a supportive environment for growth.
Lauren Chapman
Senior Behaviour Consultant
Board Certified Behaviour Analyst (BCBA)
Lauren Chapman is a Senior Behaviour Consultant at Step by Step Interventions. She is a Board Certified Behaviour Analyst (BCBA), with a Masters in Special education. Lauren specialises in delivering intervention, using the principles of Applied Behaviour Analysis (ABA), within small group instruction. With over 15 years experience working with children, adolescent, and young adults with Autism Spectrum Disorder (ASD), Attention Deficit Hyperactive Disorder (ADHD), and Global Development Delay (GDD) Lauren has the experience to support across various settings, such as in the home, school and community environments, with a range of intensities from low-intensity models (1-2 hours a week or fortnightly) to high-intensity models (i.e.,10-20 hours a week), consultations, parent training, and therapist training.
Lauren first started her career in the field of ABA as a Junior Therapist implementing ABA in a specialised school in the UK. From there, Lauren gained experience through a number of clinical and managerial roles, including Clinical Supervisor and most recently Clinical Director at a local specialised school. Lauren has supervised and lead teams of behaviour clinicians, teachers and speech pathologists within multidisciplinary models. This has provided her with a wealth of experience and knowledge that enables her to support her clients, and their families, in an environment that promotes success and independence. Lauren has a strong belief that every client has the right to an effective, sympathetic, learning experience that meets their individual needs and places their goals front and centre.
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Tanti Hardjolukito
Behaviour  Consultant
Board Certified Behaviour Analyst (BCBA)
Tanti Hardjolukito is a Behaviour Consultant at Step by Step Interventions. She is a Board Certified Behaviour Analyst (BCBA), with 20 years of experience in working with children, adolescent, and young adults with Autism Spectrum Disorder (ASD), Attention Deficit Hyperactive Disorder (ADHD), and Global Development Delay (GDD). Tanti specialises in delivering interventions using the principles of Applied Behaviour Analysis (ABA) in various settings, such as in the home, school and community environments, with a range of intensities from low-intensity models (1-2 hours a week or fortnightly) to high-intensity models (i.e.,10-20 hours a week), consultations, parent training, and therapist training.
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Tanti first started her career in the field of ABA as a Junior Therapist implementing intensive programs at home and working as a shadow to support inclusion in social and community settings in California and Texas, USA. From there, Tanti pursued the certification coursework and experience to become a Board Certified Behaviour Analyst and continued to gain experience in clinical and managerial roles, and has led teams of behaviour therapists. Tanti’s curiosity of ABA outside USA and her passion for cultural diversity has led her to leave the USA to travel and share her experience in Singapore, Philippines, Indonesia, and then in Australia.
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Ruby Taylor-Dalton
Behaviour  Consultant
Ruby Taylor-Dalton is a Behaviour Consultant at Step by Step Interventions. Ruby began her career working in ABA with us, as a Junior Behaviour Therapist. Over the past few years, she has built her skill set and moved up through the ranks to become a Lead Behaviour Therapist. While in that role, she completed her Masters in Applied Behaviour Analysis, along with a graduate program within Step by Step Interventions. Due to her success and ongoing commitment to her professional learning, we were extremely excited to offer her the role of Behaviour Consultant. Over the past few years, Ruby has gained experience working with children, adolescents, and young adults with Autism Spectrum Disorder (ASD), Attention Deficit Hyperactive Disorder (ADHD), and Global Development Delay (GDD). Ruby has experience supporting clients within a range of settings, and at varying levels of intensity. Her passion for seeing her clients grow and develop is evident in her dedication and enjoyment in her work.
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Behaviour Therapists
Our Behaviour Therapists are clinicans who have obtained their Registered Behaviour Technician (RBT) Qualification. An RBT is a paraprofessional certification in behaviour analysis. RBTs assist in delivering behaviour analysis services and practice under the direction and close supervision of a Consultant.
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Peta Williams is the founder of Step by Step Interventions. She is a Clinical Psychologist and Certified Behaviour Analyst, specialising in paediatrics and behaviour, who has been working with children and adolescents with complex disabilities for numerous years across a variety of settings, including Schools across all sectors (Public, Catholic and Independent); Private Practice; and Non-Profit Organisations. This has provided her with a wealth of experience and knowledge that enables her to identify, plan and support her clients in an environment that promotes growth in a creative, stimulating and enjoyable manner.
Director
Clinical Psychologist
Peta Williams
Peta began her career as an ABA (Applied Behaviour Analysis) Therapist in schools, at home and in the community. From there, she joined a not-for-profit organisation that specialised in the assessment and intervention of behavioural concerns and difficulties. Here, Peta developed skills in diagnostic assessments for disabilities, educational needs and emotional challenges. Peta led a team of multi-disciplinary staff, including Speech and Language Pathologists, Occupational Therapists, Teachers and Psychologists, in providing best-practice support for children and their families.
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Peta has completed her Masters of Psychology (Clinical), Master of Education (ABA), is a Registered Clinical Psychologist and is a member of The Australian Psychological Society (APS) and the Association for Behaviour Analysis Australia.
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Cindy Mihardja
Senior Behaviour Consultant
Board Certified Behaviour Analyst (BCBA)
Cindy Mihardja is a Senior Behaviour Consultant at Step by Step Interventions. She is a Board Certified Behaviour Analyst (BCBA), with a Masters in Applied Behaviour Analysis. Cindy specialises in delivering intervention using the principles of Applied Behaviour Analysis (ABA) across a variety of settings such as in the home, school and community environments, and a range of intensities, from consultative to high-intensity models (i.e., 10-20 hours a week). Cindy has been in the field of disability for over five years and has used her knowledge to support many families with a range of presentations, such as Autism Spectrum Disorder (ASD), Intellectual Disability, Down Syndrome and Attention Deficit and Hyperactivity Disorder (ADHD).
Cindy first started her career in the field of ABA as a Junior Therapist implementing intensive programs at home and working as a school shadow to support inclusion within the classroom. From there, Cindy gained experience through a number of clinical and managerial roles, including Senior Behaviour Consultant and Team Leader. Cindy has supervised and lead teams of allied health and behaviour clinicians within transdisciplinary and multidisciplinary models. She also participates as a committee member on Restrictive Practice panels.