Dr Thomas Pennington is a Surgical Oncologist and General Surgeon with specialist expertise in the management of melanoma, non-melanoma skin cancers and soft tissue sarcomas, as well as endocrine surgical conditions involving the thyroid, parathyroid and adrenal glands. He also maintains a comprehensive general surgical practice, managing a broad range of acute and elective conditions, including hernias, gallbladder disease and acute gastrointestinal disorders.

​

Dr Pennington is committed to delivering contemporary, evidence-based surgical care, with an emphasis on individualised treatment, clear communication and a considered approach to each patient's needs. He recognises that a surgical diagnosis can be a challenging and often confronting experience, and places great importance on ensuring patients feel informed, supported and involved in decisions about their care.

​

He holds appointments at Royal Prince Alfred Hospital (RPAH) and Northern Beaches Hospital (NBH), where he is actively involved in the training and supervision of Royal Australasian College of Surgeons (RACS)-accredited surgical registrars. At NBH, he also serves as Clinical Lead of the Department of General Surgery Morbidity and Mortality Audit. In addition to his public hospital appointments, Dr Pennington operates at Mater Hospital Sydney, Sydney Day Surgery – PA and Wyvern Hospital, providing patients with access to care across multiple private and public hospital settings.

​

Dr Pennington is a Faculty Member of Melanoma Institute Australia (MIA), where he holds several significant clinical governance and leadership positions. These include Chair of the MIA Surgical Craft Group, Chair of the quarterly multidisciplinary Melanoma Audit (Parameters Meeting), and membership of the Clinical, Research and Education Committee (CREC), which reports directly to the MIA Board. Through these roles, he contributes to the ongoing development of surgical standards, multidisciplinary collaboration and the advancement of melanoma care.

​

Research and clinical innovation are central to Dr Pennington's practice. His research focuses on advancing the surgical management of melanoma and non-melanoma skin cancer within the contemporary multidisciplinary model of care, with a particular interest in more personalised approaches to treatment. He has authored more than 90 peer-reviewed scientific publications (H-index 16, i10 index 22 as of November 2026), contributed to several landmark clinical trials that have helped shape modern melanoma management, and regularly presents his work at national and international scientific meetings. He is also frequently invited to speak on developments in surgical oncology.

​

Dr Pennington welcomes referrals across his areas of expertise and endeavours to accommodate patients at short notice where possible. With appointments and operating privileges across several public and private facilities, he aims to provide timely access to specialist surgical assessment and coordinated care, tailored to each patient's individual circumstances.