Dr Daubeney is a consultant paediatric and fetal cardiologist at the Royal Brompton and Chelsea & Westminster Hospitals. He completed his initial medical training at Oxford and St Thomas's Hospital, followed by specialised training in paediatric cardiology in Southampton, Melbourne, and Toronto. In 1999, he was appointed as a consultant in paediatric and fetal cardiology.

Dr Daubeney's subspecialty is in paediatric and fetal echocardiography, which involves the scanning of the unborn child's heart. His clinical expertise encompasses the care of infants, children, and teenagers with all forms of heart disease, as well as the management of heart conditions in unborn children.

Recognised for his excellence, Dr Daubeney was listed among the top 250 private doctors in the Tatler guide. He has an international reputation, having lectured globally and published over 50 scientific papers. Additionally, he has written numerous chapters and edited two books.

Dr Daubeney is deeply passionate about research into the causes and effects of heart disease in children and infants. He was awarded a Doctorate in Medicine from Oxford University in 2007 and leads a dedicated research team at the Royal Brompton Hospital and Imperial College. In 2009, he became an Honorary Reader at the National Heart and Lung Institute, Imperial College. He also founded the Congenital Heart Research Association (UK) and represents paediatric cardiology on the national Medicines for Children Clinical Research network.

Outside of his professional commitments, Dr Daubeney is married with four children. His personal interests include bridge, skiing, and rowing. He serves as President of the Phoenix Boat Club and Vice-President of the United Hospitals Boat Club.