Meet the Team
Founder, Clinical Psychologist & AHPRA Supervisor
Narmatha (Narmi) Thillainathan​
Academic | UWS |Adjunct Fellow (Macquarie University) | FCCLP Clinical College |Aff. Ed&Dev Psych| Board Clin. Supervisor| MClin Psych | Msc Hlth Beh | Bsc Psych
Narmatha (Narmi) Thillainathan is a Clinical Psychologist and the Founder of Breakthrough Psychology, with over 25 years of experience supporting children, adolescents, adults and families across clinical and community settings.
Narmi trained at the University of Sydney and holds an Adjunct position at Macquarie University and a Casual Academic role at Western Sydney University, where she teaches and supervises postgraduate Clinical Psychology students.
Her work spans comprehensive diagnostic assessments for children and adults — ADHD, Autism, intellectual disability and learning disorders — alongside therapy for anxiety, depression, trauma, school refusal, selective mutism and life transitions. She is trained in CBT, ACT, DBT, Psychodynamic Psychotherapy and Compassion-Focused Therapy, and works integratively, tailoring her approach to each client's needs and goals.
Having arrived in Australia after her family was displaced from Sri Lanka, Narmi brings a lived understanding of cultural transition, identity and belonging. She is known for her warmth, authenticity and non-judgemental style.
Testing & Administration Coordinator
Rachel Guy​
Rachel will greet you upon arrival with a warm smile and offer you a cuppa. Rachel is here to assist with your bookings and handle all things admin.
Passionate about ensuring you feel welcomed and comfortable, Rachel is dedicated to providing the best experience possible.
Rachel has a deep interest in mental health and personal insight into the value of therapy. She aspires to further her studies with a postgraduate program in psychology.
In her free time, Rachel enjoys reading, cooking delicious meals, spending time in nature, and cherishing moments with her family.
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Days of Work: Wednesday | Thursday | Friday
Ishan is a dedicated and compassionate psychologist committed to guiding individuals on their path to mental well-being and personal growth. With a Bachelor of Science (First Class Honours in Psychology) from the University of Sydney, Ishan brings a solid foundation of knowledge and a passion for understanding the intricacies of the human mind.
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One of Ishan’s defining qualities is his warm and caring personality. Ishan approaches his clients with genuine compassion and a non-judgmental attitude, creating a safe space for them to explore their thoughts and emotions. His ability to empathise and connect on a personal level fosters a therapeutic relationship built on trust and understanding.
Registered Psychologist
Kristina Baker
AdvDip(Psych) | Bsc Psch
Kristina is a warm and empathic psychologist, and she is passionate about supporting her clients in improving their mental health and wellbeing. Kristina is a Registered Psychologist, with a Bachelor of Psychology from Macquarie University and an Advanced Diploma in Psychology from Monash University.
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Kristina operates in a neurodiversity affirming and trauma informed framework and creates a safe and supportive environment for her clients, helping them build strengths and coping skills. She has a particular interest in neurodiversity, early development, developmental disorders and anxiety.
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When she is not with her clients Kristina engages in regular mindfulness practice and enjoys gardening, reading and training in Brazilian Jiu Jitsu. She also loves spending time with her friends, family and her Australian Cattle Dog.
Nuch is a Registered Psychologist who brings a warm, curious and down-to-earth style to her work. She holds a Master of Psychology (Clinical) from Bond University and a Bachelor of Science (Honours) from the University of Queensland. Before joining Breakthrough Psychology, she worked in a specialist neurodiversity clinic conducting psychological and neurodevelopmental assessments, and in an inpatient mental health setting facilitating individual and group interventions.
Nuch works with children, adolescents and adults experiencing anxiety, depression and other mood-related concerns, self-esteem difficulties, stress and burnout, perfectionism, and adjustment or life transitions.
Known for her warmth, calm and genuine, non-judgemental manner, Nuch creates a safe space where clients feel comfortable speaking openly and leave with greater clarity and practical next steps. Outside the clinic, she is a competitive Ballroom and Latin dancer, and enjoys reading, cooking and experimenting with all things sourdough.
Nuch is available on Mondays and Wednesdays, 10.30am–6.30pm.
Registered Psychologist
Nadine Sarah
MPP | BA Psych | BSC Psych (Hon)
Nadine is an experienced Registered Psychologist, with a Professional Masters in Psychology from Macquarie University and an honours degree in Psychology. She has worked in complex systems, such as the Northern Beaches Hospital, Child Protection (data analysis) and Head to Health before entering private practice.
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Nadine is passionate about working with children, adolescents and young adults. She loves sharing her knowledge of Psychology in assisting by transforming the lives of clients, who are experiencing anxiety, depression, adjustment, grief and loss, trauma.
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She has most recently returned from Hatha & Asthtanga Vinyasa Yoga Teacher Training in Rishikesh, India. She balances this passion by her daily self-care practice of mindfulness, pranayama and yoga. By nature, Nadine is compassionate, calm, patient and non-judgemental in the way she engages with her clients.
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Her orientation of work is client-centred, holistic and varies to suit each client. She is trained in Cognitive Behavioural, Acceptance and Commitment, and Mindfulness Therapies.
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Nadine also speaks Tamil fluently.
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Nadine is a member of the Australian Association of Psychologists incorporated (AAPi).
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Nadine is currently on Sabatical.​​