Senior Technologist - Materials

About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths – values essential to achieving what no one has before. Together, we will change the future of energy, because the world can't wait. What You Will Be Doing: You will apply advanced technical expertise to support engineering research, development, and manufacturing through hands-on materials testing, analytical system operation, and precision fabrication. In this role, you will independently execute complex test workflows, configure and maintain equipment, and troubleshoot technical issues to ensure diagnostic readiness and high-quality results. You will collaborate closely with engineers to translate test requirements into reliable, real-world setups, while using critical thinking and sound judgment to solve problems and improve processes. You will also mentor junior Technologists and communicate findings through clear data analysis and reporting that informs engineering decisions. You Will: - Operate, maintain, and troubleshoot materials testing and analytical equipment, including load frames, profilometers, durometers, microscopy systems, and SEM - Execute test plans in accordance with ASTM standards or collaborate with engineers to develop custom test methodologies, including sample preparation, fixturing, and data analysis - Configure and validate test setups to ensure accurate, repeatable results and alignment with engineering intent - Document procedures, calibration activities, and test results with clarity and discipline to support quality and traceability - Analyze and communicate data effectively to inform design decisions and improve system performance - Lead troubleshooting efforts across mechanical systems, instrumentation, and workflows, identifying root causes and implementing corrective actions - Design and fabricate fixtures and components to support testing needs, ensuring precision and reliability - Provide mentorship and technical guidance to early career Technologists on equipment operation, fabrication techniques, and safe work practices - Develop working knowledge of radiation safety practices, including contamination control, monitoring techniques, and controlled-area workflows - Partner with engineers to interpret requirements and translate them into robust testing processes that generate meaningful performance data Required Skills: - 8+ years of hands-on experience operating mechanical testing systems and analytical instrumentation in a similar technical environment - Strong proficiency in materials testing equipment and imaging tools, including mechanical test frames and microscopy systems - Extensive hands-on fabrication experience, including fixture design, assembly, and precision measurement - Demonstrated ability to execute structured test workflows and produce reliable, high-quality data - Experience troubleshooting complex mechanical and instrumentation issues, with the ability to independently identify root causes and drive solutions - Strong technical documentation skills, with attention to procedural rigor, calibration standards, and quality control - Ability to collaborate effectively with engineers to translate design