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About Tempo Based in San Diego, California, Tempo develops thermochemical energy storage (TCES) systems designed for energy-intensive industries. The platform enables industrial operators to shift energy use over time by sourcing power when it is most cost-effective and enables the electrification of high-temperature industrial heat at a cost advantage to using fossil fuels. By storing electricity thermochemically, the system delivers a continuous stream of combustion-free, high-temperature air at up to 1,200°C. Tempo is backed by leading climate and energy investors, including Breakthrough Energy Ventures, Khosla Ventures, and Prelude Ventures. For more information, visit www.tempoenergy.com . Job Description Tempo is seeking a highly motivated and skilled Engineering Technician with strong welding capabilities to produce engineered parts and assemble testing apparatus, instruments, sensors, prototypes, and power electronic components. The ideal candidate is a driven professional who has recently graduated from a strong technical program, has 2–4 years of hands-on experience, and is eager to bring their energy and foundational skills to a fast-paced startup environment. You will work both independently and collaboratively to bring our engineering designs to life. This role is integral to the development and refinement of high-temperature energy storage components, offering an incredible opportunity to work on complex R&D projects and grow your career at the cutting edge of thermochemical energy storage technology. Key Responsibilities Interpret 3D CAD models, 2D drawings, and spec charts to plan and execute part manufacturing; measure, mark, and cut raw materials accordingly Perform TIG/MIG welding on structural assemblies and operate machine shop equipment (mills, lathes, drill presses, band saws) to create or modify parts Assist in assembling complex mechanical and electromechanical systems as required Prepare finished components for dimensional accuracy, weld integrity, and defects for inspection Modify and repair parts, prototypes, and test rigs to support agile R&D needs using welding, grinding, cutting, and machining techniques Work with high-temperature and specialty materials (refractory metals, ceramics, alloys) to meet durability and performance requirements for thermochemical applications Partner with engineers to interpret technical drawings, troubleshoot fabrication challenges, and recommend design improvements for manufacturability Inspect fabricated and welded components for structural integrity, finish, and dimensional accuracy to ensure parts meet required tolerances Maintain welding gear and machine tools in optimal working condition; follow all safety protocols when welding, handling high-temperature materials, and operating machinery Record prototype builds, assembly procedures, fabrication parameters, and component modifications, providing real-time feedback to engineering and R&D teams Qualifications Required: Associate degree in Mechanical Engineering Technology, formal welding certification, or completion of a technical/trade school program 2–4 years of hands-on experience in mechanical fabrication, welding, and assembly; experience in an R&D or startup environment a plus Proficiency in TIG and MIG welding on various metals Exceptional safety acumen and commitment to safe work practices Familiarity with manual mills, lathes, grinders, and general metalworking tools Ability to read and interpret engineering drawings, blueprints, and technical specifications Strong willingness to learn about high-temperature and specialty materials (ceramics, alloys, refractory metals)  Exceptional attention to detail with the ability to work to tight tolerances Proactive learner with the ability to assist in troubleshooting basic fabrication challenges. Clear communicator able to collaborate effectively with engineers a