Processing & Joining Metallurgist / Materials Engineer

Join us and make YOUR mark on the World! Lawrence Livermore National Laboratory (LLNL) has turned bold ideas into world-changing impact advancing science and technology to strengthen U.S. security and promote global stability.  Our mission spans four critical national security areas nuclear deterrence, threat preparedness, energy security, and multi-domain defense empowering teams to take on the toughest challenges of today and tomorrow. With a culture built on innovation and operational excellence, LLNL is a place where your expertise can make a real impact. We have an opening for a Processing and Joining Metallurgist/Materials Engineer to develop, qualify, and implement metallic joining and thermal processing methods for critical national security components. In this hands-on role, you will lead process development and metallurgical characterization, partnering with design, modeling, materials, and production organizations across LLNL and external production agencies. You will work within an interdisciplinary team to establish process, structure, and property relationships in structural alloys, with opportunities to grow into a technical leader in joining and thermal processing. This position is in the Materials Engineering Division (MED) within the Engineering Directorate. This position requires full-time on-site presence due to the nature of the work. This position will be filled at either level based on knowledge and related experience as assessed by the hiring team. Additional job responsibilities (outlined below) will be assigned if hired at the higher level. You will  Develop, execute, and optimize metallic joining and thermal processing methods in a laboratory environment, including electron beam and laser welding, vacuum brazing, diffusion bonding, HIP, and heat treatment for steels, nickel-base alloys, and other structural alloys. Provide metallurgical engineering support for processing, materials selection, and property investigations. Participate in the design, setup, and operation of processing and joining systems, including fixture design, parameter development, and troubleshooting. Perform metallurgical characterization and joint evaluation using sample preparation, optical microscopy (SEM as appropriate), hardness testing, and mechanical testing (for example, tensile or bend tests) to assess quality and performance. Organize, analyze, and present data from experiments and process development activities to improve understanding of process, structure, and property relationships. Collaborate with scientists, engineers, technologists, designers, and production partners as part of integrated teams spanning design, analysis, prototyping, and production implementation. Integrate experimental results with analytical or computational models (for example, process models, thermal or stress analyses, or microstructure evolution tools) to inform process window development and production workflows. Travel up to approximately 20% to external production facilities (for example, Y-12, Los Alamos National Laboratory, and the Kansas City National Security Campus) to observe and support operations, review procedures, and provide feedback to LLNL program management and design teams. Perform other duties as assigned. Additional job responsibilities, at the SES.2 level  Take technical ownership of specific joining and thermal processing operations, including requirements definition, specification input, process qualification, and continuous improvement. Provide technical guidance and informal mentoring to less experienced staff, technicians, and students in joining and processing development, sample preparation, and metallurgical characterization. Lead or co-lead defined technical tasks or small projects, coordinating across team members and tracking progress against scope, schedule, and quality requirements. Ability to obtain and maintain a U.S. DOE Q-level security clearance, which requires U.S. citizenship. Bachelor's degree in Metallurgical Engineering, Materials Science and Engineering, Welding Engineering, Mechanical Engineering, or a closely related field, or an equivalent combination of education and relevant experience. Experience planning and executing experiments in metallic joining or thermal processing (for example, welding, brazing, diffusion bonding, HIP, or heat treatment), including data collection, analysis, and documentation. Strong understanding of the relationships among processing parameters, microstructure, and mechanical properties, and the ability to assess joint and material quality using microstructural observations and basic mechanical test data. Experience or training in microstructural characterization of metallic materials and/or joints, including sample preparation and optical microscopy, with familiarity with SEM or other advanced methods as a plus. Demonstrated ability to work effectively on multidisciplinary teams, communicate status and results, and incorporate feedback. Sufficient verbal and written communication skills to prepare, present, and explain technical information. Demonstrated commitment to safe work practices and the ability to adapt to evolving priorities. Ability to travel to external production facilities to support program operations. Additional qualifications at the SES.2 level  Comprehensive knowledge and experience focused on metallic joining or thermal processing, or closely related roles. Experience developing, optimizing, or qualifying joining and processing methods (for example, high energy density welding, vacuum brazing, diffusion bonding, or HIP) in a laboratory or production setting. Experience working in quality-controlled or regulated environments (for example, DOE, aerospace, or nuclear), including the use of procedures, travelers, or work instructions. Demonstrated ability to independently plan and execute joining and processing experiments and metallurgical characterization, interpret res