Our Doctors

drhorton – Dr Matthew Horton MBBS, FRACS

Dr Horton is a cardiothoracic surgeon with a special interest in VATS (Video-Assisted Thoracic Surgery), aortic surgery, valve surgery and bypass surgery. After graduating from Sydney University and completing his Fellowship at Oxford he was appointed as a consultant surgeon at St Vincent’s and St George Hospital. He continues to work at St George Hospital and also at St George Private Hospital, where he sits on the Medical Advisory Committee. Dr Horton passionately supports the Knights of St George, a registered charity set up in 1985 by his father Dr David Horton (a former cardiothoracic surgeon). This charity has to date raised over $1.25m for life-saving equipment for the Cardiothoracic Unit at St George Hospital.

Languages spoken: English, French

dr-peeceyen – Dr Sheen Peeceeyen  MBBS, MS, MCh, FRACS

Dr Sheen Peeceeyen is a cardiothoracic surgeon at St George Private and St George Hospitals with a special interest in adult cardiac surgery, aortic surgery and minimally invasive thoracic surgery. After obtaining his cardiothoracic qualifications from The University of Kerala, India, he further trained at Westmead Hospital, St Vincent’s Hospital NSW and St George Hospital. Dr Peeceeyen is currently Supervisor of Training in Cardiothoracic Surgery at St George Hospital, for the Royal Australasian College of Surgeons.  Dr Peeceeyen is also a trustee for the Knights Of St George.

Languages spoken: English, Hindi, Tamil, Malayalam

drmanganas – Dr Con Manganas MBBS, MS, FRACS

Dr Con Manganas is a consultant cardiothoracic surgeon at the St George, St George Private and Wollongong Hospitals.

Dr Manganas graduated from the University of NSW (1990) and subsequently completed cardiothoracic surgical training, obtaining  Fellowship of the Royal Australasian College of Surgeons in 1999.

Dr Manganas also has a Master’s Degree in Surgery (Research) and is a member for the International Association for the Study of Lung Cancer and The Australian New Zealand Society of Cardiac and Thoracic Surgeons.

His special interests include mitral valve reconstructive surgery, lung cancer surgery, teaching, medical ethics and medico-legal aspects of surgical practice.   


Languages spoken: English, Greek

drfermanis – Dr Gary Fermanis MBBS, FRACS

Dr Gary Fermanis is consultant cardiac and thoracic surgeon at St George Private and Head of the Department of Cardiothoracic Surgery at St George Hospital.

He has an active interest in teaching and mentoring, both undergraduate and post graduate, and was a lecturer for The University of NSW (1991-2001) and supervisor for post graduate training (2001-2009). Dr Fermanis became an executive member of the State Committee of the Royal College of Surgeons in 2012 and was also elected in 2009 to the Royal Australasian College of Surgeons. Dr Fermanis is also a trustee for the Knights Of St George.

Trustees for the Knights of St George – please click here for more information.