Daniel Stack is the Co-founder and CEO of Electrified Thermal Solutions, Inc. (ETS), a new technology startup that is decarbonizing industry with renewable heat. He earned his PhD in Nuclear Science and Engineering at the Massachusetts Institute of Technology, with a specialization in energy conversion and thermal energy storage. His doctoral inventions form the foundation of ETS and its flagship product, the Joule Hive™ thermal battery. Daniel is an Activate fellow of the 2021 Boston cohort and an awardee of ARPA-E SEED, and a representative on the Long Duration Energy Storage Council. He has authored and co-authored papers on electrified thermal energy storage in academic and industry journals. He has spoken at various energy conferences, workshops and panels on repowering industrial processes and power plants with electrified thermal energy storage.