As the Head of Cardiac Imaging at Peninsula Health, Dr Premaratne has overseen the rapid expansion and growth in Cardiac CT, Transthoracic echo, Transoesophageal echo, Stress echo, Nuclear Cardiology, Dobutamine echo and introduced Contrast echo. He has forged a close working relationship with the Department of Radiology which has led to numerous successful cooperative endeavours including the overhaul of the Echocardiography reporting platform. 

He is the Head of the Siemens Luminary Site CT Lab which operates the revolutionary Siemens Force. Peninsula Health is one of only two luminary sites in Australia and New Zealand for Siemens.

As recognition of his efforts, he was invited to join the Annual Scientific Meeting Committee of the Society of Cardiovascular Computed Tomography, the world organisation responsible for Cardiac CT and is also part of the Australia and New Zealand International Regional Committee for SCCT. He is an invited speaker at international meetings and a reviewer for national and international cardiology journals.

As a co-investigator, he has been awarded two grants from the Heart Foundation and the Australia-India Strategic Research Fund. 

Examiner for the Peninsula Clinical School

Supervisor of Third Year and Fifth Year Medical Students

His interests lie in Coronary plaque and its role in prognostication, Infective endocarditis, Appropriate Use of Cardiac Imaging and novel applications using machine learning.