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 technical understanding of vacuum technology, scientific fundamentals, and diagnostic equipment to support research, development, and manufacturing activities across the RaSNS department. You will install, test, troubleshoot, and maintain laboratory systems while upholding safety, quality, and procedural standards. In this role, you will solve technical problems, assess system performance, and contribute to continuous improvement of workflows. You will also develop proficiency in radiation safety practices and expand your capabilities through hands-on learning, curiosity-driven investigation, and close collaboration with engineers and senior Technologists.

You Will:

Install, operate, and maintain laboratory research and development systems that support RaSNS engineering activities
Configure vacuum, cryogenic, mechanical, and analytical equipment; perform routine system checks; and identify issues requiring troubleshooting or escalation
Apply scientific reasoning and diagnostic methods to evaluate system behavior, validate test configurations, and support experimental readiness
Conduct repairs or adjustments to lab equipment under defined procedures, ensuring safety, accuracy, and compliance with quality standards
Develop working knowledge of radiation safety practices, including contamination control, monitoring techniques, and controlled-area workflows
Learn tritium handling and work to become a tritium Authorized User
Document test setups, observations, and system performance with clarity and discipline, using data to track reliability and communicate functionality
Collaborate with Engineers and senior Technologists to refine processes, improve system reliability, and advance department goals

Technologist - Radiation Safety and Nuclear Science

Job Description

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