Omar José Guerra Fernández is a research engineer at the National Renewable Energy Laboratory (NREL), Golden, Colorado, and works within the Power Systems Design and Planning (PSDP) group at the Grid Analysis and Planning Center (GPAC) . He received the B.Sc. Chemical Engineer from the Industrial University of Santander, Bucaramanga, Santander, Colombia, in 2005; the M.Sc. in Chemical Engineering from the University of São Paulo, São Paulo, Brazil, in 2009, and obtained the Ph.D. BS in Chemical Engineering from Purdue University, West Lafayette, Indiana, USA, in 2017. At NREL he is conducting research to develop a better understanding of the economics of renewable energy technologies, including energy storage, hydrogen, power wind, solar photovoltaic and CO2 electrolysis technologies. He is the author or co-author of a variety of publications on the following topics: economics of multi-scale energy storage, hydrogen and CO2 electrolysis technologies; integration of wind and solar photovoltaic energy sources into energy systems; and modelling, simulation and optimization of large-scale integrated energy systems. His awards include the NREL President's Award 2021 and the College of Engineering Outstanding Research Award, Purdue University, 2017.