Krishna Reddi, PhD, is a systems modeling and analysis engineer at the Argonne National Laboratory. He contributes to the techno-economic analysis of the hydrogen delivery infrastructure and environmental analysis of hydrogen fuel cell vehicles. He helped to add new features and update the Hydrogen Delivery Scenario Analysis (HDSAM) model. His research interests include sustainable engineering, energy systems, sustainable energy systems, and life cycle analysis. Reddi obtained his PhD in mechanical and aerospace engineering from Syracuse Univ.