Professor Braun studied Medicine at MH Hannover, Germany and SUNY at Buffalo, USA. His focus on transplant medicine started with his thesis developing a detection method for FK506 in blood using liquid-chromatography mass-spectrometry (LC-MS). Surgical training was completed at University Medical Centers in Goettingen, Germany and Kiel, Germany with a guest stop at Jackson Memorial Hospital Miami, USA. Since 2015, Prof. Braun is responsible for visceral transplant medicine at UKSH, Campus Kiel, Germany. Research topics are liver transplantation, hepatocellular carcinoma and immunosuppressive drugs. Professor Braun is political active in the German Transplantation Society, German Medical Association and member of the liver transplant audit committee.