Kaitlin Sherriff - Director
Registered Psychologist
BAppSc(Psych), GDipPsych, MProfPsych
Kaitlin is a registered psychologist with an interest in Autism spectrum disorder, behaviour and developmental psychology. She is passionate about providing a range of interventions for children and their families, including individual therapy, group programs and designing strategies to enhance learning and social development to assist families and school staff in managing challenging behaviours.
Kaitlin has developed a passion towards assisting children, adolescents and their families by providing evidence-based services using a collaborative approach with educators, learning support teams in educational settings, other allied health services and referring agents. Kaitlin believes in up-skilling families and support networks to ensure they feel confident and capable of implementing ongoing supports for their children.
Kaitlin offers assessments and interventions for children and adolescents and has a particular interest in working with people on the Autism Spectrum.
Kaitlin has a Bachelor of Applied Science (Psychology) and a Graduate Diploma in Psychology from Deakin University, and a Master in Professional Psychology obtained at Western Sydney University. She has worked in both non-government organisations and private sectors, including early intervention, schools and clinics in various regions of Sydney, and has provided a range of services to families from a variety of cultural and linguistic backgrounds.
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Registered Psychologist
Lidia Toledo
B.Psych
Lidia is a warm and dedicated registered psychologist with a strong interest in supporting the mental health and wellbeing of children and young people. She is passionate about using play-based and developmentally appropriate interventions, and takes a collaborative, routines-based approach when working with families to build practical and sustainable outcomes.
Lidia has a particular interest in supporting children and adolescents with complex medical needs and dual diagnoses. She is committed to improving quality of life and fostering empowerment through tailored interventions, working closely with families, school staff, and multidisciplinary teams to ensure holistic care.
Lidia provides therapy across a wide range of mental health presentations, adapting her approach to meet the unique needs of each child or teenager. She values psychoeducation as a key part of her work, helping families better understand their child’s needs and how best to support them at home, school, and in the community.
As an APS Board-Approved Supervisor, Lidia also enjoys guiding provisional psychologists through their training pathways, offering thoughtful and structured support to help them meet their professional goals.
Lidia holds a Bachelor of Psychology from the University of Newcastle. She brings a wealth of experience from working across non-government and private sectors, including early intervention settings, school-based programs, and multidisciplinary clinics. She has worked with families from a wide range of cultural and linguistic backgrounds and is committed to delivering inclusive, strengths-based care. Lidia offers psychology services in English, Portuguese and Spanish.
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Registered Psychologist
Isabella van Gelder
B.Psych
Isabella is a registered psychologist who holds a Bachelor of Psychology (Honours). She has worked across a range of settings, including private practice, rehabilitation, and the disability sector. Throughout her career, Isabella has supported individuals across the lifespan with diverse presentations such as intellectual disabilities, autism spectrum disorder (ASD), attention-deficit/hyperactivity disorder (ADHD), depression, anxiety, chronic illness, stress, and relational difficulties.
With a particular passion for adolescent and young adult mental health, Isabella recognises this life stage as a pivotal period for developing adaptive coping strategies that can enhance wellbeing throughout adulthood.
Isabella is dedicated to providing evidence-based care, drawing from approaches such as Cognitive Behavioural Therapy (CBT), Acceptance and Commitment Therapy (ACT), Dialectical Behaviour Therapy (DBT), Motivational Interviewing, and Mindfulness-Based Cognitive Therapy (MBCT).
She is known for her compassionate and client-centred approach, creating a warm, safe, and supportive environment where individuals feel heard, understood, and empowered to reach their goals and navigate life’s challenges with confidence.
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Vesi Petruseva
Registered Psychologist
B.A. (Psych) (Hons), GradDipCouns
Vesi is a Registered Psychologist with a Bachelor of Arts (Psychology – Honours) from Macquarie University, and a Postgraduate Diploma in Counselling from the Australian College of Applied Psychology. She is also an AHPRA Psychology Board-approved Supervisor.
Vesi provides individual counselling to children and adolescents experiencing a wide range of concerns, including anxiety, depression, trauma, attachment issues, social skills difficulties, low self-esteem, bullying, school transitions, and school refusal. She also offers counselling and behavioural support to parents of children with behavioural challenges.
In addition to therapy, Vesi conducts comprehensive psychometric assessments for intellectual disability, specific learning disorders (such as dyslexia and dyscalculia), ADHD, Autism Spectrum Disorder, and other emotional and behavioural concerns.
Her therapeutic approach draws on a range of evidence-based modalities, including Cognitive Behaviour Therapy (CBT), Acceptance and Commitment Therapy (ACT), Dialectical Behaviour Therapy (DBT), Motivational Interviewing, Brief Solution-Focused Therapy, Narrative Therapy, and Play Therapy. Her work is grounded in attachment theory and is deeply rooted in person-centred principles.
Vesi is also trained in delivering parenting programs such as Circle of Security, 1-2-3 Magic, and Engaging Adolescents. She has extensive experience supporting parents to develop and maintain strong, secure attachments and positive relationships with their children and teenagers.
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Allied Health Assistant
Rhys Hatten
With over a decade of experience in Out of School Hours Care (OOSHC) and as a Student Learning Support Officer (SLSO) in school classrooms, Rhys brings extensive expertise in working with children, particularly those with additional needs. Holding both Certificate III and Certificate IV qualifications in Classroom-Based Education Support, Rhys has developed a strong skill set in adapting learning environments and providing targeted assistance to ensure students are supported effectively. He is recognised for his patience, warmth, and genuine care, qualities that enable him to build meaningful connections with children and foster their growth.
Rhys is currently completing a Bachelor of Primary Education at the University of Sydney, with the goal of pursuing a long-term career in education and continuing to support children in achieving their potential.
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Jade Quarta
Administration Assistant
Jade is the friendly and welcoming face you will meet, often being the first point of contact for children and families attending the clinic. She has a strong passion for working with people and takes pride in creating a calm, supportive, and organised environment for clients and clinicians alike. Known for her warm personality, professionalism, and attention to detail, Jade ensures that every visit runs smoothly.
Currently completing a Bachelor of Psychology at Macquarie University, Jade is deeply interested in child development and aspires to pursue a career in developmental psychology in the future.
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