Sotirios is a Consultant Gynaecologist and Accredited Subspecialist in Reproductive Medicine and Surgery at Imperial College NHS Trust. He also holds an Honorary Clinical Lectureship at Imperial College London. He has served as a Deputy of the Reproductive Surgery SIG of ESHRE and has also developed guidelines on topics such as recurrent miscarriage and congenital uterine anomalies for the Royal College of Obstetricians & Gynaecologists.