Dr Quek received her undergraduate medical training at University College London (University of London) and graduated in 1999, with awards in genetics, physiology, pathology, pharmacology and overall performance. Returning to Singapore in 2000, she entered the post-graduate training programme in Paediatrics at the National University Hospital, Singapore and passed the Singapore and British examinations in Pediatrics in 2003. After fully completing the six year training program, she became fully registered as a paediatrician with the Singapore Medical Council in 2007 and also became a Fellow of the Academy of Medicine, Singapore in 2008. She is a member of the Royal College of Paediatrics and Child Health (United Kingdom).

She joined the Child Development Unit at the National University Hospital in 2008 and worked with children with a wide variety of developmental and behavioural concerns, including Autism Spectrum Disorder, Attention Deficit Hyperactivity Disorder, learning differences/ disorders, developmental delays, hearing impairments, child development in the context of chronic diseases or after recovery from childhood cancers etc. She also liaised and worked closely with the ENT department at NUH, working to help children with hearing impairments to optimise their learning and development.
Dr Quek has been working in private practice since 2014. She is currently the director of Quek and Marcou Developmental and Behavioural Paediatrics Clinic.

She works with a wide range of children and families, both resident in Singapore and internationally. She works closely with local and international schools to optimize support for the children.
Her work involves not only the child but also helping and working collaboratively with parents and families to understand their child’s strengths and vulnerabilities and supporting parents in advocating for their child.