Dr Garrick Don is a Respiratory & Sleep Physician, and holds the position of Staff Specialist at Royal North Shore Hospital, with additional admitting and consulting rights at North Shore Private Hospital. Dr Don is an integral member of the multidisciplinary Interstitial Lung Disease and Lung Cancer MDT's at RNSH. Dr Don is a member of the Thoracic Society of Australia and New Zealand, and the Australian Lung Foundation.

Current clinical practice covers a wide range of disorders including Airways Disease (COPD, emphysema, asthma and bronchiectasis), Interstitial Lung Disease, Pulmonary Hypertension, Lung Cancer, Tuberculosis, Bronchoscopy and Sleep Medicine.