Jhi-Young Joo is a research scientist in the Grid Integration Group at Lawrence Berkeley National Laboratory. She has been doing research in power systems engineering and economics since her senior year in Korea, and received her Ph.D. in Electrical and Computer Engineering from Carnegie Mellon University. Her work in aggregation of demand resources for alleviating transmission congestions in day-ahead and hour-ahead operations received the Best Paper Award at the 2014 IEEE Power and Energy Society General Meeting. She taught power system operations and optimization courses and lead research projects as a tenure-track faculty member at Missouri University of Science and Technology (formerly University of Missouri-Rolla) for two years before moving to Berkeley Lab in August 2016. Jhi-Young is interested in mathematical modeling and optimization of various economic and physical entities in the complex power grid. Some of the topics of interest include aggregation of different components (DERs) for grid services at transmission and distribution (T&D) levels, interconnection of transmission and distribution systems, and electricity markets at T&D levels.