Dr Leong’s research interests are in utilising minimally invasive bronchoscopic technology to advance translational research in cancer. She is leading the TRACKER initiative of a national biobank for metastatic lung cancer. She is also heavily engaged in national projects to improve quality of lung cancer care through involvement in LUCAP which is a national lung cancer clinical quality data platform, and the drive to implement a national lung cancer screening program.

Dr Leong is the current President of the Thoracic Society of Australia and New Zealand (TSANZ) Victoria branch, and is a national TSANZ board member where she is the Director of Australian branches and Director of Lung Cancer.