Ellen M. Saylor is a Senior R&D Staff member at the Oak Ridge National Laboratory providing nuclear criticality safety support and technical expertise to various DOE and NRC programs and assisting in various training courses. She received a B.S. in Nuclear Engineering from the Pennsylvania State University in 1992. Ellen served as a Nuclear Criticality Safety Engineer for over 20 years, starting at the Rocky Flats Environmental Technology Site in Golden, Colorado and continuing in the same capacity at the United States Enrichment Corporation in Paducah, Kentucky, the Y-12 National Security Complex in Oak Ridge, Tennessee, and the Oak Ridge National Laboratory in Oak Ridge, Tennessee. Ellen’s duties at these various sites included performing, revising and reviewing multiple criticality safety analyses for various operations involving multiple forms and types of fissionable materials, providing daily support for operations, reviewing various procedures, operations and safety documents, and providing nuclear criticality safety training. Ellen is a member of the Nuclear Criticality Safety Division of the American Nuclear Society and is a member of several standards’ working groups, including chairing the working group for ANSI/ANS-8.17, Criticality Safety Criteria for the Handling, Storage, and Transportation of LWR Fuel Outside Reactors.