Dr. Mark Hon Wah Ignatius is a Senior Consultant ENT Surgeon with extensive experience in treating snoring, obstructive sleep apnea, sleep disorders, nasal obstruction, and thyroid lumps. He completed his medical degree and ENT training in Singapore, earning memberships with the Royal College of Surgeons of Edinburgh and the Royal College of Physicians and Surgeons of Glasgow. Dr. Mark further specialized in Sleep Surgery through a fellowship at Stanford University, where he trained under leading pioneers in sleep medicine and surgery.

Dr. Mark is a Certified International Sleep Specialist by the American Board of Sleep Medicine and has held key roles at Singapore General Hospital, including running its Sleep Clinic. Currently, he serves as an Adjunct Senior Lecturer at the National University of Singapore and continues to educate medical professionals on sleep disorders and ENT care. Dr. Mark has also contributed to medical literature and co-authored a textbook on interpreting sleep study results.