Leif has a strong scientific expertise in Respiratory Medicine and organ transplantation, with a PhD. from the Department of Respiratory Medicine, University Hospital, Lund, Post Doc experience from The Alfred Hospital, Melbourne, Australia. He is an author of more than 40 scientific papers. He acted as a Medical Director of the Lung Transplant program and the adult Cystic Fibrosis unit Lund University Hospital before joining AstraZeneca. During his four years as Medical Science Director at AstraZeneca, Lund, Leif was instrumental in taking several lead candidates into clinical concept testing. Between 2011 and 2013 Leif held a position as Medical advisor in Transplantation/Immunology, at Astellas Pharma. Currently Leif is a Medical Director at AstraZeneca R&D Mölndal.