Lionel Rostaing is currently working as a Professor of Nephrology in the Department of Nephrology, Hemodialysis Apheresis, and Kidney Transplantation at Grenoble Alpes University, Grenoble, France. His primary areas of study are internal medicine, transplant medicine, kidney transplantation, and transplant immunology. His biological study spans a wide range of topics, including chronic hepatitis C virus infection in patients with chronic kidney diseases, cytomegalovirus, and BKV virus infections in kidney-transplant patients. His studies in transplantation integrate themes in fields like clinical endpoints, randomized controlled trials, cohorts, belatacept, and mTOR inhibitors. His kidney-transplantation study combines topics in areas such as therapeutic drug monitoring, regimens, pathology, nephropathy, and calcineurin inhibitors. His transplant immunology research is multidisciplinary, incorporating perspectives on chronic hepatitis infections, organ transplantation, and new immunosuppressive drugs.