Dr. Sharon Collins Presnell, Ph.D., has been Chief Scientific Officer at Organovo Holdings, Inc since June 10, 2016 and served as its President of Samsara since June 10, 2016. Dr. Presnell served as an Executive Vice President of Research and Development at Organovo Holdings, Inc. until June 10, 2016 and served as its Chief Technology Officer since April 25, 2012 until June 10, 2016. Dr. Presnell served as Senior Vice President of Regenerative Medicine & Biology of Tengion, Inc. Dr. Presnell served as Vice President for Regenerative Medicine and Biology for Tengion Inc., since April 30, 2007. Before joining Tengion, Dr. Presnell was a Scientific Leader at the Becton Dickinson research facility in Research Triangle Park, N.C., where she was responsible for the growth and leadership of a 50 person, multi-disciplinary group in cell and tissue engineering. During her tenure, her team discovered and developed a portfolio of products and technologies from inception to first commercial application, including BD's Discovery Platform(TM), a bioinformatics-driven platform for the directed growth and differentiation of primary human cells used in drug discovery and therapy. She has more than 20 publications in the cell biology field and is an inventor on multiple patents related to commercial use of human cells. She was an adjunct faculty member at Duke University and has served on the executive board of directors of the eastern regional chapter of the Juvenile Diabetes Research Foundation. Dr. Presnell's career in academics and industry has consistently been focused on the study of human cells and disease mechanisms, with an emphasis on discoveries that have the potential to directly impact human health. She received her Ph.D. in Cellular and Molecular Pathology in 1995 from the Medical College of Virginia and completed post-doctoral studies in Liver and Prostate Biology at the University of North Carolina, where she served on the faculty, conducting stem cell research.