Dr Mithran Goonewardene completed his Bachelor of Dental Science with Honours from the University of Western Australia and undertook his specialist training at the Forsyth Dental Center in Boston, USA, obtaining a Certificate in Orthodontics from the Harvard School of Dental Medicine/Forsyth Dental Center and a Master of Medical Science degree from the Harvard Medical School.

Dr Goonewardene has combined part-time practice in Subiaco and Booragoon with a significant teaching role at the University of Western Australia for 20 years. He delivers numerous lectures and courses locally, nationally and internationally and plays an active role in education and delivery of orthodontic and surgical services in Sri Lanka, where he visits regularly.

Dr Goonewardene is an active member of the Australian Society of Orthodontists, the American Association of Orthodontists, the Sri Lankan Orthodontic Society and the Australian Dental Association. He is a full member of the Edward H. Angle Society of Orthodontists. Dr Goonewardene is a Fellow of the International College of Dentists and a Fellow of the Academy of Dentistry International.

Dr Goonewardene is a proud father of six children, four adults and two who are finishing up high school. Roy the oldest is a dentist who is enrolled in a specialist orthodontic training program in the US. Christine is studying physiotherapy and both Georgia and Katherine are studying in the UK.