Dr Sean Brennan

  • MBChB(Zimb), FFRad(T)SA, FRANZCR
  • Radiation Oncologist
  • Spoken languages English


Cancer diagnosis has implications not only for the patient but for their family, and that patient care must also support and involve the family

South African born, Sean grew up in Malawi and Zimbabwe. He obtained his undergraduate medical degree in Zimbabwe where he practiced as a government medical officer in northern Zimbabwe’s rural areas before moving to Cape Town to continue his studies. He specialised as a clinical oncologist at Groote Schuur in Cape Town where he practiced for several years before moving to Australia. Sean obtained his radiation oncology fellowship in Australia in 2011. Before embarking on a new life adventure with GenesisCare in Bunbury, he worked continuously in regional Far North Queensland.

Sean has been very actively involved in the education of medical students and RANZCR trainees. Previously a director of training, he has also held a number of senior positions within the College. He is currently the chief examiner for the Faculty of Radiation Oncology.

Sean has a particular commitment to regional and rural communities, believing that all patients should expect and receive the very best treatment available irrespective of their geographical location.

Sean has worked extensively across many tumour types throughout his career.  His key focus areas are breast, neurological, urological and cutaneous malignancies.

Sean is married with two children. He and his family have travelled much of the world. Since moving to Australia, they have become avid outback adventurers and have a great love of nature and conservation.

Professional memberships

  • Royal Australian and New Zealand College of Radiologists (RANZCR)
  • European Society for Radiotherapy and Oncology (ESTRO)
  • Trans Taman Radiation Oncology Group (TROG)