Marjan Jahangiri graduated in medicine from University College Hospital, University of London, in 1988. Subsequently, she completed her senior house officer positions at University College London and affiliated hospitals. She completed her training in General Surgery in 1992 and embarked on a career in cardiothoracic surgery.

She then became a registrar in cardiac surgery at the London Chest, St. Bartholomew’s and the Royal Brompton Hospitals in London. She was awarded a research fellowship at the William Harvey Laboratories at St. Bartholomew’s Hospital and Medical School.

Having completed her research fellowship in 1996, she returned to the Royal Brompton Hospital as a senior registrar where she trained in the fields of adult and paediatric cardiac surgery. She was awarded a position in sub-specialist paediatric cardiac surgery as a senior resident at the Children’s Hospital, Boston, Harvard.

Upon her return from the United States in 1999, she obtained a position as national trainee in paediatric cardiac surgery at Hospital for Sick Children, Great Ormond Street and Birmingham Children’s Hospital for a period of two years. She was appointed as Consultant Cardiac Surgeon and Senior Lecturer at St. George's Hospital and Medical School in 2001. She was appointed Professor of Cardiac Surgery at University of London in 2007.