Dr Ng is a Senior Consultant Medical Oncologist at the National Cancer Centre Singapore, sub-specializing in genitourinary, thoracic, head and neck, and nasopharyngeal cancers. He completed his medical training at Imperial College, University of London, and is a member of the Royal College of Physicians in the United Kingdom. 

He is a clinician scientist, and is a current recipient of the National Medical Research Council research grant to develop new drugs for the treatment of cancer. He was awarded the Doctor of Medicine degree by University College London for his research into novel vascular targeting anti-cancer drugs. He is also actively involved in research to develop functional imaging as a biomarker in oncology. He was awarded the Cancer Research UK research fellowship as well as the British Oncological Association Young Investigator Award for his work. His research has been widely published in both oncology and radiology journals. 

He is actively involved in medical education. He is clinical senior lecturer at the Yong Loo Lin School of Medicine, National University of Singapore, as well as research mentor to Duke-NUS Medical School students.