welcome to excelsis psychology

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Excelsis Psychology is owned and operated by Dr Liezl Addinall, Clinical & Counselling Psychologist. Liezl has a wealth of experience working with children and adolescents from all walks of life and is passionate about helping children and young people achieve personal success, psychological health & wellbeing and social & emotional coping skills. She enjoys working alongside parents to develop insight into their child’s difficulties and implementing practical strategies to assist at home and school.

Liezl’s postgraduate research has focused on women’s mental health and relationships, and at Excelsis Psychology she is passionate about providing a professional and caring service to all women requiring support.

At Excelsis Psychology we offer individualised evidence-based psychological counselling, psychoeducational assessments, parenting support, group intervention services and workshops.

We welcome referrals from individual families, medical specialists, health professionals, and educators.  

Please contact us to learn more about our services and how we may be able to assist.



(08) 9409 2048


18B/151 Herdsman Parade, Wembley WA 6014

Suite 3/14 Reid Promenade, Joondalup WA 6027




Please complete the form below to contact us with questions or bookings.

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