Jude Children's Research Hospital from 1993 to 2004.[1] Prior to joining St. Jude, Nienhuis was Chief of the Clinical Hematology Branch and Deputy Clinical Director at the National Institutes of Health’s Heart, Lung and Blood Institute.[2] His research interests and expertise in bone marrow transplant, gene therapy and genetic testing paved the way for many advances at St. Jude, including breakthroughs in sickle cell disease and other hematological disorders.[3] Nienhuis also made significant achievements in the fields of cell therapy, HIV/AIDS research and inherited immunodeficiencies.[4] Under his leadership, the hospital completed a $1 billion expansion, which included the addition of a Children’s GMP, LLC facility.[5] Additionally, Nienhuis oversaw the creation of the Departments of Developmental Neurobiology and Structural Biology.[6]