We have an opening for a  Postdoctoral Researcher  in the areas of atomistic and multiscale modeling to optimize metal joining in alloyed systems. The overarching goal of this project is to develop an integrated simulation-experiment workflow to maximize the utility of lab-scale tests by elucidating the fundamental scientific principles governing metal part joining. You will actively participate in the development of Machine-learning interatomic potentials (MLIP) for large-scale atomistic modeling with quantum-mechanical accuracy for use in Grand Canonical grain boundary interface searches and the determination of subsequent interfacial properties. This work will occur in conjunction with mesoscale modeling and experimental teams to determine the effects of interfacial defects, impurities, phase transformations, and transient liquid phases on joining strength. The position is in the Materials Dynamics and Kinetics group of the Materials Science Division in the Physical & Life Sciences Directorate, supporting the Energetic Materials Center (EMC). Depending on your assignment, this position may offer a hybrid schedule, blending in-person and virtual presence. You may have the flexibility to work from home one or more days per week.  You will Perform and analyze first principles-based simulations (e.g., DFT, DFTB, etc.) to generate reference and validation data. Develop GPU-enabled MLIP models for complex intermetallic and alloyed systems for use in grain boundary and interface modeling. Provide inputs for mesoscale and thermodynamic modeling approaches, including mass transport properties and interfacial energies. Development and maintenance of our advanced atomistic simulation codes for interatomic model optimization and simulation. Aid in maintaining an organized and accessible materials data base for ML-driven experimental predictions. Document research; write and publish papers in peer-reviewed journals, and present results within the DOE community, at working group meetings, and at conferences. Pursue independent but complementary research interests and interact with a broad spectrum of scientists internally and externally to the Laboratory. Perform other duties as assigned.