Dr Tan joined O&G The Women's Medical Specialist as Obstetrician and Gynaecologist. Currently, he also holds the position of the Medical Director. Prior to his current appointment, Dr Tan was the Senior Consultant in the Department of Obstetrics and Gynaecology and Urgent O&G Centre at the KK Women’s and Children’s Hospital.

Besides that, Dr Tan holds Professional Appointments and Committee Memberships. He won many awards as an outstanding clinician as well as an educator. In 2018, Dr Tan won the SingHealth Excellence Awards for Distinguished Educator. Apart from that, in 2015, he co-authored the a book which won the British Medical Association Book Award.

Dr Tan also co-developed the HealthHub Pregnancy Track. It is a new mobile app as well as web portal under the Health Promotion Board. Throughout his career as a gynaecologist, he had delivered more than 5,000 babies.

Dr Ng is trained in antenatal and gynaecological ultrasound scans, prenatal screening, antenatal risk assessment and care, natural childbirth, instrumental vaginal deliveries (vacuum and forceps) and caesarean section, colposcopy, cystoscopy and management of patients with menopausal and fertility problems.

He has presented papers in these topics at medical conferences in Singapore and overseas, in addition to winning the 2nd prize for his research at the 6th International Scientific Meeting of the Royal College of Obstetricians and Gynaecologists in 2005. He has also authored medical papers and has served as a reviewer on peer-reviewed journals in obstetrics and gynaecology. Dr Ng’s dedicated care to his patients has won him 4 Service from the Heart Awards and a national Excellent Service Award (EXSA). His commitment to work and patients was recognized with a Long Service Award from KK Hospital in 2007.