Born and educated in London, UK); he then went on to study Medicine at The Royal London Hospital, (University of London, UK). He represented the university first, as General Secretary of the Student Union, then as President of the London Medical Group (an ethical society). He was editor of a student information journal until he qualified in medicine. In sports, he has represented The Royal London Hospital Rowing Club and The Queen’s Club, England, in Tennis. Following a full adult and pediatric general surgical training, he then completed training in heart and lung surgery, specializing in both adult and children’s problems. During 1986-8, he conducted a scientific clinical research study into problems encountered in perfusion for children's heart surgery at the Royal Postgraduate Medical School, Hammersmith, UK, and was subsequently awarded a Master of Surgery, degree - conferred by the University of London. His training and clinical experience have included The Children’s Hospital, Great Ormond Street, Guy’s Hospital in London, & Dr. Albert Starr’s unit in Oregon, where he was a Visiting Professor. He gained further specialist pediatric cardiac training in the neonatal switch procedure at The Royal Children’s Hospital in Melbourne, Australia, (the busiest and largest unit in the Southern Hemisphere). First-hand medical war experience was obtained when he was invited to set up a heart surgery unit in the Iran-Iraq war in 1987-8. His research interests have included xeno-transplantation in Alberta, Canada, investigating new immuno-suppressants for future heart transplantation, and he has been involved in heart transplantation programs in four locations. Dr. Marath is an instructor for the American Trauma Society, and currently, he is a regular invitee as an ATLS Instructor for the Mayo Clinic, Rochester, MN, USA. CardioStart International is a charity that he had conceived in 1987, which sets up heart surgical units and provides free instruction and initiation of children and adult heart surgery to underdeveloped countries seeking assistance. Utilizing the support of colleagues from all over the world, volunteer teams representing CardioStart International Inc., have started or helped develop cardiac and intensive care units in 105 visits to 40 countries. During the last 30 years, CardioStart has sent 54 shipping containers of donations of usable medical equipment valued at over $60 million. Dr. Marath is an STS and WSPCHS member and contributes as an associate editorial reviewer for The Brazilian Journal of Cardiovascular Surgery, Cardiology in the Young and the WSPCHS.