We have an opening for a Postdoctoral Researcher to investigate material reactions and interface evolution through controlled high-temperature experiments and quantitative electron probe microanalysis (EPMA). You will design and conduct diffusion-couple, phase-equilibrium, reaction-zone, and thermomechanical experiments, including experiments using Gleeble systems as applicable. You will characterize compositional gradients, phase formation, interdiffusion, segregation, and reaction-zone evolution using EPMA and complementary materials-characterization methods. You will interpret experimental results using thermodynamics, phase equilibria, and kinetic principles, and collaborate with researchers in materials characterization, metallurgy, computational modeling, and data science. This position is in the MicroAnalytical Signatures Group within the Nuclear and Chemical Sciences Division. Lawrence Livermore National Laboratory’s Postdoctoral Research Program provides mentored training to enhance professional skills and research independence for individuals who have recently earned their doctoral degree and are pursuing their chosen career path. This position requires full-time on-site presence due to the nature of the work. You will  Plan and execute high-temperature materials experiments using established and developing experimental methods. Design and conduct diffusion-couple, thermomechanical, and heat-treatment experiments, including use of Gleeble systems, furnaces, or comparable equipment. Prepare, characterize, and analyze samples using quantitative EPMA, including wavelength-dispersive spectroscopy (WDS), compositional mapping, and standards-based measurements. Collect, analyze, document, and interpret experimental data related to composition, processing conditions, phases, microstructure, diffusion, and interfacial reactions. Apply thermodynamic, phase-equilibrium, and kinetic principles to interpret material behavior and develop scientifically supported conclusions. Collaborate with multidisciplinary teams of experimentalists, computational modelers, metallurgists, and data scientists. Contribute to technical reports, peer-reviewed publications, presentations, and research proposals. Maintain accurate laboratory records and support safe, secure, and compliant laboratory operations. Perform other duties as assigned.