As Advantage Psychology employs a large team of psychologists, we are able to offer assessment and treatment services for adults, adolescents and children with a wide range of mental health issues.
To ensure that we are able to provide you with cutting edge psychological treatments and interventions, all our Psychologists attend regular professional development training, conferences, seminars, case discussion, professional supervision and belong to the Australian Psychological Society.
MITCH O’BRIEN
Clinical Psychologist & Director
Client Focus: Adult
Mitch is a Clinical Psychologist and Business Director with a warm, practical approach to therapy. He works primarily with adults who are proactively addressing concerns with anxiety, stress, and depression. Mitch also has a particular interest in providing executive, life, and career coaching, drawing on his background in business to help clients navigate professional and personal development.
He utilises a flexible, evidence-based approach to treatment, drawing from Cognitive Behaviour Therapy (CBT), Acceptance and Commitment Therapy (ACT), mindfulness practices, Internal Family Systems, and skills training. Mitch is a fully endorsed Clinical Psychologist and holds a Master’s degree in Clinical Psychology.
Mitch is available for appointments at our Penrith, St Mary’s, and Rouse Hill clinics, and welcomes referrals through Medicare, BUPA ADF, and Private pathways.
BAILEY ELLIS
Registered Psychologist
Client Focus: All Ages
Bailey brings a warm, approachable style to his work with clients. He is passionate about creating a safe and supportive space where individuals feel heard and empowered to work toward meaningful positive change.
Bailey uses evidence-based approaches including Cognitive Behaviour Therapy (CBT) and mindfulness strategies to support clients in managing a range of emotional and psychological challenges. He is particularly interested in helping clients navigate stress, anxiety, and life transitions.
Bailey holds a Bachelor of Psychology (Honours) and is a member of the College of Professional Psychology and an Associate Member of the Australian Psychological Society (APS). In addition to his work in private practise, his experience includes providing short-term crisis support with Lifeline Australia, as well as assisting individuals through workplace rehabilitation and Workers Compensation processes.
Bailey consults from both our St Marys and Rouse Hill clinics, and welcomes referrals through Medicare, private and NDIS (self managed or planned).
AJLA BECIROVIC
Registered Psychologist
Client Focus: Child & Adolescent
Languages: English, Bosnian
Ajla is a Clinical Psychologist Registrar with a strong passion for helping young individuals build confidence, resilience, and clarity in their lives. She brings a warm and collaborative approach to her work, creating a safe space for clients to explore life’s challenges and take meaningful steps toward healing and growth. Ajla has a passion for working with individuals with anxiety, depression, stress, trauma, and substance-related challenges. She draws on evidence-based modalities including Cognitive Behavioural Therapy (CBT), Acceptance and Commitment Therapy (ACT), and Narrative Therapy. Ajla values working with each person’s unique strengths and tailoring therapy to support their goals. She is also experienced in psychological assessments, including cognitive and developmental assessments, and offers clear, practical feedback and recommendations.
Ajla has completed her Master of Clinical Psychology and has worked in multidisciplinary teams alongside GPs, psychiatrists, educators, and allied health professionals.
Ajla sees clients at our Rouse Hill location and welcomes referrals via Medicare or private clients.
PAUL SALVIANI
Registered Psychologist
Client Focus: All Ages
Paul is a Registered Psychologist with a Bachelor of Physical and Health Education, a Graduate Diploma of Psychology, and a Postgraduate Diploma of Psychology.
He has extensive experience in supporting both young people and adults through the assessment and treatment of a wide range of mental health challenges. He specialises in Workers Compensation, Cognitive, ADHD, and ASD assessments, offering a comprehensive approach to each client’s unique needs. Paul integrates various evidence-based treatment modalities, including Cognitive Behavioural Therapy (CBT) and Solution-Focused Therapy, to help individuals overcome obstacles and achieve meaningful progress.
Paul works at both our Rouse Hill and Penrith practices and welcomes referrals through Medicare, Private, BUPA, and Work Cover arrangements.
AYESHA RIAZ
Provisional Psychologist
Languages: English, Hindi, Urdu
Client Focus: All ages
Ayesha Riaz is a passionate mental health practitioner who is known for her warm and attentive style, creating a safe space for her clients to feel understood. Ayesha delivers evidence-based interventions tailored to each client’s needs, drawing on approaches such as Cognitive Behavioural Therapy (CBT), Acceptance and Commitment Therapy (ACT), and mindfulness. She is committed to culturally sensitive practice and takes a holistic, recovery-focused approach, helping clients build confidence, insight, and long-term wellbeing. She also has over 8 years’ experience working with disability and transition to work within the NDIS industry.
She is available for appointments at St Marys and Rouse Hill, and accepts Medicare, private, and NDIS (self-managed and plan-managed) referrals.
CINDY LAM
Registered Psychologist (Assessments)
Cindy is a registered psychologist with a very gentle and nurturing way of engaging with her clients. She uses a strengths based approach when working with the clients and works collaboratively with them to help them reach their goals. Cindy provides specialist assessment services for Autism diagnosis using the ADOS/ADI-R Assessment with children and adolescents. Cindy also conducts cognitive and psychometric assessments with children, adolescents and adults.
Cindy is a member of the APS and works at our St Marys practice.
CHRISTINE WEBSTER
Clinical Psychologist (Forensic)
Christine runs our Forensic Assessment team at Advantage, providing comprehensive psychological assessments and reports for a variety of criminal matters. These include medicolegal reports, S14 reports and firearms assessments. She has over 18 years experience in the assessment and treatment of acute mental health across public and private settings.
Christine holds a master’s degree in Clinical Psychology, is endorsed as a Clinical Psychologist, and is an AHPRA board approved supervisor.
Christine sees clients at our Penrith Practice.
NICOLA RICH
Clinical Psychologist
Client Focus: Adolescent & Adult
Nicola is a Senior Clinical Psychologist with over 15 years of experience supporting adolescents and adults with a wide range of mental health concerns. She has a calm, thoughtful, and practical approach, and is committed to working collaboratively with her clients to help them achieve meaningful change.
Nicola draws on evidence-based therapies including Cognitive Behaviour Therapy (CBT), Acceptance and Commitment Therapy (ACT), and Schema Therapy. She has particular interest and experience in treating depression, panic disorder, sleep difficulties, social anxiety, and trauma.
Nicola has facilitated programs such as the “Cool Kids” anxiety program and the Chronic Pain group for the Hawkesbury Hills Division of GPs.
Nicola offers therapy exclusively via telehealth (video or phone), making her accessible to clients across Australia from the convenience of their home or work. She accepts referrals under Medicare, private arrangements, and is an approved provider for DVA, NDIS, and Work Cover arrangements.
MICHELE MOUSSA
Registered Psychologist
Client Focus: Adolescent & Adult
Michele Moussa is a warm and approachable Psychologist who offers a supportive, non-judgmental space where individuals can explore their thoughts, emotions, and experiences at their own pace. Michele has special interest in supporting individuals dealing with anxiety, depression, stress, sleep disturbances and anger management. She is known for bringing a calm and compassionate presence to her sessions, helping clients feel safe and heard — especially when working through complex or sensitive issues.
Her approach is grounded in evidence-based practices including Cognitive Behavioural Therapy (CBT), Acceptance and Commitment Therapy (ACT), mindfulness, schema therapy, and solution-focused strategies. Michele tailors her approach to each person’s unique needs and goals, helping them move toward lasting change and improved wellbeing.
Michele is a member of the APS and is registered with the Australian Health Practitioner Regulation Agency.
Michele is available for sessions at both St Marys and Rouse Hill locations, and welcomes referrals through Medicare, private, and self-managed or plan NDIS.
NICHOLAS SALEEBY
Registered Psychologist
Client Focus: Adolescent & Adult
Nick is a registered psychologist with a relaxed, approachable, and authentic style. He creates a supportive environment where clients feel heard and understood, working collaboratively to help them move toward meaningful change.
Nick draws on a strengths-based framework and incorporates evidence-based approaches such as Cognitive Behavioural Therapy (CBT) and Dialectical Behaviour Therapy (DBT) skills. He is passionate about supporting adolescents and adults with a range of challenges including anxiety, depression, anger, ADHD, and emotional regulation.
Nick is committed to helping his clients develop insight, build resilience, and find effective strategies to improve their wellbeing and quality of life.
He consults from our St Marys and Rouse Hill practices and accepts referrals under Medicare and private arrangements. Nick is also an approved provider for DVA, NDIS, and Work Cover.
CAITLIN LEMON
Provisional Psychologist
Client Focus: All Ages
Caitlin is a registered Provisional Psychologist who works with clients of all ages, offering a warm and supportive therapeutic style. She has a particular interest in helping individuals experiencing anxiety, stress, and depression, as well as children and adolescents managing emotional and behavioural challenges.
Caitlin holds a Bachelor of Psychology (Honours) from the Cairnmillar Institute and is currently completing her Master of Clinical Neuropsychology at Macquarie University. She brings several years of experience in the mental health sector and has worked with clients from a wide range of cultural backgrounds.
Caitlin adopts a holistic and person-centred approach, drawing on psychoeducation, skills training, and cognitive behavioural strategies to support each client’s unique needs and goals.
She is based at our Rouse Hill clinic and is approved to provide services under the NDIS.
MADISON JOSEPH
Provisional Psychologist
Client Focus: Child & Adolescent
Madison is a Provisional Psychologist currently completing her Master’s in Clinical Psychology. She has experience working in the mental health sector as an Applied Behaviour Analysis (ABA) Therapy Assistant and as a Crisis Supporter with Lifeline Australia. In addition, Madison has several years of experience in the fitness industry as a personal trainer, where she has advocated for exercise as a powerful tool to empower individuals, enhance emotional well-being, and manage stress, anxiety, and other related symptoms. Madison is committed to fostering strong therapeutic relationships and providing a warm and empathetic environment that gives clients the space to gain deeper self-awareness and move towards their goals.
MARCOLEEN BRITZ
Provisional Psychologist
Languages: English, Afrikaans
Client Focus: All Ages
Marcoleen is a registered Provisional Psychologist with a Bachelor of Psychology (Honours) from the University of New England and is currently pursuing her Master of Clinical Psychology at ACAP. She also holds a Master of Applied Behaviour Analysis from Griffith University. With experience as a Behaviour Support Practitioner, Marcoleen specializes in supporting children and adolescents with Autism, ADHD, and Anxiety. Her Person-Centred approach incorporates evidence-based methods, including Cognitive Behaviour Therapy (CBT), Dialectical Behaviour Therapy (DBT), Acceptance and Commitment Therapy (ACT), and Narrative Therapy (NT). Passionate about helping clients navigate emotional regulation, self-esteem, depression, and behavioral challenges, Marcoleen is dedicated to making a positive impact.
Marcoleen is an Associate Member of the APS and works at our Rouse Hill practice.
WAME GOFAMODIMO
Registered Psychologist
Client Focus: Adolescent & Adult
Wame is a registered psychologist with a Bachelor of Psychology from the University of Newcastle and a Master of Professional Psychology from Deakin University. She is dedicated to providing a safe, non-judgmental space for adults to process challenging life experiences with compassion and respect. Wame tailors evidence-based approaches to meet the unique needs of each client, fostering a warm and collaborative therapeutic relationship. Her areas of interest include trauma, mood and anxiety disorders, eating disorders, relationship challenges, workplace issues, and life transitions. With a commitment to empowering her clients, Wame guides them on their journey toward healing and personal growth.
Wame is a member of the APS and works at our St Marys practice. She welcomes referrals from Medicare, Work Cover and Private referral pathways.