Oversee test programs designed to develop an understanding of complex mechanical phenomena (e.g., creep, fatigue, creep fatigue, stress corrosion cracking, and fracture) in sodium cooled fast reactor plant materials such as steel alloys. Perform scientific analysis of reports and test data (e.g., metallography, non-destructive inspection, mechanical properties, ductility) and generate technical specifications to document new knowledge related to reactor design and qualification.