Our Team

Our team of clinicians at Thinkahead are highly qualified with a minimum of 10-30 years clinical experience working with children, adolescents, and adults. Each member of our team has completed at least six years of university training including a post-graduate masters degree in their respective field.

At Thinkahead we are committed to providing excellent customer care, supportive and therapeutic interventions and are experienced in treating complex cases. Please see below for a more detailed overview of our clinicians experiences and areas of expertise.

Tanja Limnios – Founder and Managing Director

Tanja Limnios is a registered psychologist and corporate coach with over 30 years clinical and organisational experience. She specialises in the assessment and treatment of mental health conditions ranging from anxiety, depression and trauma to  eating disorders, low self esteem and workplace issues. Tanja has a masters degree and  additional training in eating disorders and uses evidence based interventions when treating individuals, children, couples and families. Tanja works closely with local GP’s, communities and corporate organisations and divides her time working across both the clinical field of private practice as well as the corporate consulting space.

Being a parent herself she works closely with parents, couples and families and uses a family systems approach; psycho-education and parenting skills training to help support all members within the family unit.

Tanja also works in the corporate consulting space and has expertise in assisting and treating individuals experiencing workplace difficulties such as bullying and harassment; interpersonal conflict with peers and/or management; performance issues and workplace injuries requiring return to work interventions. Tanja is a SIRA accredited provider and provides clinical intervention through the Workers Compensation Scheme.

Tanja also works closely with individuals to deal with the broader issues that surface in all organisations and takes a very strategic and solution focused approach. She uses a combination of positive psychology, coaching and counselling to create behavioural change and build resilience.

Tanja provides consultancy services to a variety of corporate organisations and delivers training programs to various industries. Her focus is to provide early intervention, equipping managers to better support staff as well as implement effective preventative strategies. Tanja is also a presenter at a number of national conferences and was a lecturer at the Australian College of Applied Psychology.


  • Bachelor of Arts (Psychology)
  • Masters of Applied Psychology
  • Diploma of Business



  • Certificate IV in Training and Assessment (TAE40110)
  • EMDR St John of God Hospital (Burwood)
  • Advanced Critical Incident Stress Debriefing Jeffrey Mitchell and George Everly (Baltimore)
  • Understanding personality and personality disorders (Hunter Institute of Mental Health)
  • Bereavement Counselling Mal McKissock (Sydney Bereavement Centre)
  • Breaking the Pattern of Depression Dr Michael Yapko (Sydney)
  • Therapeutic Treatment of Acute Stress Disorders (Hunter Institute of Mental Health)
  • Eating Disorders Essentials ( Australian Centre for Eating Disorders)



  • Full Member of Australian Psychological Society (APS104604)
  • Medicare Registered (2861052K)
  • Member of the Psychological Board of Australia (PSY1237261)
  • WorkCover Approved Provider



Sarah Barker – Social Worker and Behaviour Therapist

Sarah Barker is an experienced social worker and behaviour therapist who’s passion is working with children and adolescents with disabilities. She holds a masters degree in social work and a bachelor in psychology and brain behaviour.

Sarah takes a very practical and tailored approach when working with individuals and their families. Her strategies are based on the “positive behaviour support model” which focuses on positive and proactive behaviour change. Her therapeutic interventions increase and strengthen helpful behaviours through positive reinforcement and minimise challenging behaviours. Often families focus on negative consequences which can further trigger and reinforce negative behaviours.

Sarah helps families to be more proactive in anticipating where things may go wrong and help parents and carers identify and manage triggers instead of negatively reacting to difficult situations and/or behaviours.

As children’s behaviours are often learned through their interactions with their environment, Sarah helps parents develop strategies which positively reinforce acceptable behaviours and minimise the re-occurring of less desirable behaviours. Over time, children learn that difficult behaviours become ineffective and unnecessary and therefore are less likely to be repeated.

Sarah has additional training and draws on evidence-based programs such as – The Tripple P Program, 123 Magic, Circle of influence and transitioning to school.

Sarah works with a range of behaviours such as:

  • Temper- Tantrums, Toilet Training,
  • Defiance/compliance and back-chatting,
  • School refusal,
  • Anxiety and Trauma,
  • Poor or disrupted sleep
  • Fussy eating,
  • Transition to school and every day independence skills

Sarah also has a great understanding of the NDIS framework and can assist families with case management/advocacy, NDIS preplanning and/or appealing decisions. Sarah can also provide NDIS support co-ordination.



  • Bachelor of Arts (Psychology)
  • Masters of Social Science (Professional qualification)
  • Masters of Social Science (Advanced Practice)



Cleo Eshun-Wilson – Educational and Child Psychologist

Cleo Eshun Wilson is an Educational and Child Psychologist who has supported children of all ages and their families.

Cleo has a strong background in assessments and her passion is working with children 2-17 years of age. She uses an eclectic approach to therapy and her expertise is conducting cognitive testing, ASD assessments and dyslexia testing. Cleo frequently performs cognitive (IQ) assessments; giftedness, learning difficulty and school-readiness assessments; individual and group scholastic testing; subject choice and vocational counselling; programming in special educational settings, as well as behavioural modification and psychological therapy for emotional issues.

To create the best possible support platform for your child, she liaises with schools, teachers, pediatrician’s and allied health practioners’. Finding quick yet lasting solutions for your child and family is her heart felt goal.

After having her own children, communication and development issues in infancy and early childhood became a focus of her professional interest. Cleo has gained additional qualifications in Play Therapy and developed further skills in the assessment and management of Autistic Spectrum Disorders.

In addition to conducting assessments, Cleo provides individual and family counselling and supports parents and carers with behaviour management; guidance during periods of grief and loss, separation and family stress. She has vast experience with children who have additional needs and helps families to develop positive relationships.



  • Bachelor of Arts (Psych)
  • Bachelor of Education (School Counsellor)
  • Masters of Education (Ed Psych)



Rachel Daruty – Speech Pathologist

Rachel  Daruty is a certified Speech Pathologist with over 10 years clinical experience. Her passion is working with children with a disability as well as adults. She gained her experience working for Ageing Disability and Home Care (ADHC) where she worked with people with a disability that were between  the ages of  1 to 65 years. Throughout that time she provided support to children with feeding difficulties, children and adults that were diagnosed with  Autism Spectrum Disorder (ASD) and other Developmental Disorders.

Rachel supports children and adults with both language and speech difficulties and assists individuals to reach out to people using any assistive technology or any other communication system of augmentative and alternative communication (AAC)

Rachel has extensive experience providing support to people with a swallowing disorder after assessing their skills and providing them with a suitable mealtime management plan. She also provides training to staff supporting clients with a disability and delivers training to teachers and staff within the school environment.



  • Bachelor of Speech Pathology



  • Certified Practicing Member  of  Speech Pathology Australia  (15112)
  • Medicare Registered (4828455Y)



Lindsay Gibson – Speech Pathologist

Lindsay Gibson is an experienced speech therapist. Lindsay studied speech therapy and audiology in South Africa and graduated with an honours degree in 2003. She has been in Australia with her family since 2016 and is a Certified Practicing Member of Speech Pathology Australia. Lindsay has over 18 years of experience working in schools and in private practice, with children with a variety of communication and literacy needs. She has a very personal interest in disability and Autism Spectrum Disorder.

Lindsay takes a very hands on approach when working with children and their families. Her speech therapy sessions increase and strengthen communication through positive reinforcement and praise.

Lindsay is also available to conduct Speech and Language screeners at preschools to help families and teachers make decisions regarding necessary intervention before children head off to primary school.



  • Bachelor of Speech and Hearing Therapy (Hons)