Dr. Weaver has spent much of his career in advanced reactor design and analysis, where he has initiated and executed complex test programs and contributed to designs for advanced nuclear reactor concepts. His experience has allowed him to focus on some of the critical technical challenges facing advanced reactor concepts, such as the development and testing of advanced nuclear fuels and materials. Dr. Weaver re-joined the Idaho National Laboratory (INL) in the spring of 2018 where he is the Chief Technical Officer for the Advanced Test Reactor (ATR), was the technical lead/PI for all INL work supporting the Westinghouse eVinci microreactor, supported a mobile microreactor project, served as Director of Experimental Capabilities for the Versatile Test Reactor (VTR), and supported the effort for integrated transient testing of advanced reactor fuels. Before re-joining INL, Dr. Weaver worked at TerraPower from 2007 to 2018, holding various positions including Technical Fellow, Director of Technology Integration, and Director of Technology Development. In these capacities he was responsible for identifying, developing, and maintaining domestic and international joint programs and relationships that supported TerraPower technology development for their various advanced reactor programs. Before joining TerraPower, Dr. Weaver worked at the INL for more than nine years (1998-2007) in various capacities, all related to the development and use of advanced nuclear reactor concepts. Dr. Weaver is the author/co-author of more than 90 publications and technical reports in nuclear science and engineering, and is a co-author of a textbook on fast spectrum reactors. He holds a BS degree in physics, and PhD degree in nuclear engineering.