Manufacturing Engineer, Battery Assembly

HADRIAN - MANUFACTURING THE FUTURE Hadrian is building autonomous factories to reindustrialize America. By combining AI, advanced software, robotics, and full-stack manufacturing, we help aerospace and defense companies build rockets, satellites, aircraft, ships, and other mission-critical systems up to 10x faster and at significantly lower cost. Following our $1.37B Series D at a $7.87B valuation, Hadrian is rapidly expanding our manufacturing footprint, launching new capabilities across welding, casting, forging, electronics, additive manufacturing, and more, while scaling our Factory-as-a-Service platform to transform how critical products are built. Backed by leading investors including JPMorgan Chase, Valor Equity Partners, Andreessen Horowitz, Founders Fund, 137 Ventures, Lux Capital, T. Rowe Price, and Morgan Stanley, we’re building the future of American manufacturing—and looking for exceptional people to help make it happen. If you’re ready to take on the most challenging and rewarding work of your career while helping create American manufacturing jobs for generations to come, you’re exactly who we’re looking for. THE ROLE Hadrian is expanding our battery pack assembly team and is looking for a Manufacturing Engineer to help bring our pilot battery pack assembly line from concept to a working, repeatable, and safe production line. This is a hands-on role. Working alongside the Battery Pack Engineering Lead and a small team of specialists, you'll develop and refine the processes, fixturing, and tooling that turn cells into qualified packs. You'll get deep exposure to pack and module assembly, cell joining, thermal management, test, and safety, with room to grow your ownership as the line scales. WHAT YOU'LL DO - Develop, document, and improve assembly processes across the pilot line: cell intake and sorting/matching, module and pack build sequence, busbar and interconnect assembly, thermal interface application, enclosure, and potting/sealing - Support cell joining process development (laser / ultrasonic / resistance welding), including weld parameter development, qualification builds, and in-process verification - Design and build fixturing, stations, and tooling for the pilot line, with an eye toward eventual automation on Hadrian's robotics and software platform - Write and maintain clear work instructions, process control plans, and standard work for assembly operations - Support electrical test, formation, and characterization processes, and help define and execute pack-level acceptance testing - Implement cell-level traceability and lot control on the line, partnering with Quality on inspection plans and nonconformance dispositions - Run root cause and corrective action on process issues, yield losses, and equipment problems; drive improvements to yield, throughput, and cost - Support battery safety practices on the floor, including safe handling procedures, thermal runaway mitigation measures, and compliance testing activities (e.g., UN 38.3 transport) - Partner cross-functionally with design (mechanical/electrical/thermal), automation/controls, supply chain, quality/qualification, and program teams to move the line toward production readiness WHAT WE'RE LOOKING FOR - Bachelor's degree in Electrical, Mechanical, Chemical, Materials, Manufacturing, or Industrial Engineering, or a related technical field - 2+ years of manufacturing or process engineering experience, ideally with hands-on exposure to battery pack or module assembly, energy storage, or another electro-mechanical assembly environment - Working knowledge of at least one cell joining or precision joining process (laser, ultrasonic, or resistance welding, or comparable processes) - Experience developing fixturing, tooling, or work instructions for assembly operations - Comfort working on the production floor: building, testing, breaking, and fixing things yourself - Strong problem-solving fundamentals, including structured root cause analysis and data…