Siobhan O'Ceallaigh qualified in Medicine from University College, Dublin in 1996. Following early plastic surgical training in Ireland, she moved to Manchester to undergo a research fellowship at the University of Manchester in 2002. Following the awarding of her doctoral thesis in 2005, Siobhan commenced higher surgical training in plastic and cosmetic surgery in the North West training region. After being awarded the FRCS (plast) fellowship in Plastic Surgery, she became a National Oncoplastic Breast Fellow where she undertook her fellowship at the renowned Nottingham Breast Institute, learning about the management of all aspects of breast cancer treatment as well as refining skills in breast reconstruction and aesthetics.
She also undertook a national cosmetic training fellowship in Nottingham. On awarding of her Certificate of Specialist Training and entry on to the Specialist Register in Plastic Surgery, Siobhan was appointed as a plastic and oncoplastic breast surgeon at the Royal Victoria Infirmary, Newcastle in May 2012 before returning to Manchester to take up a breast reconstruction post at Wythenshaw Hospital in June 2013. Siobhan specialises in microsurgical breast reconstruction (DIEP, TRAM, TUG flaps) and other complex and revision breast surgery. She also specialises in the treatment of developmental breast asymmetry and all aspects of breast reconstructive and aesthetic surgery.