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: We are looking for a Health Physicist to join our Radiation Safety team to work with radiation, radioactive materials, radiation survey equipment, and team members with varying levels of technical familiarity with these subjects, as we operate Polaris and build future fusion generators. This position is ideal for an experienced professional eager to make a significant impact on radiation safety practices at Helion. As a member of the radiation safety contingent of the Science team, which includes radiation safety, fuel cycle, plasma and nuclear science, and materials contingents, you will work closely with diverse teams across Helion, such as Research & Development, Engineering, Production, EH&S, Facilities, and more. You will report to our RSO at our Everett, WA office. You Will: * Work with cross-functional teams to design, establish, implement, and execute a comprehensive radiation safety program supporting safe, compliant, and effective radiological operations * Develop and optimize protocols for handling radioactive materials and radiological hazards, including photons, neutrons, tritium, and activated materials * Communicate radiation safety principles and health effects effectively to team members with varying levels of expertise * Operate survey equipment including liquid scintillation counters, NaI detectors, HPGe detectors, Geiger counters, and ion chambers * Perform and improve critical health physics functions, including dosimetry, leak tests, wipe tests, radiation surveys, environmental monitoring, and radiological procedure development * Lead and mentor junior team members and partner teams, driving strategic initiatives and contributing to innovative safety methodologies tailored to fusion technology by ensuring cohesive execution across functions Required Skills: * Bachelor’s degree in Health Physics, Nuclear Engineering, Radiological Sciences, Physics, or a related technical field is preferred * 5+ years of progressive experience in radiation safety, with demonstrated leadership in designing and owning complex radiation safety programs or objectives. Advanced qualifications or certifications such as CHP (Certified Health Physicist) are highly preferred for senior candidates * Ability to communicate complex radiological concepts effectively across multidisciplinary teams * Strong understanding of radiation protection principles, dosimetry, contamination control, and regulatory compliance frameworks * Experience developing, implementing, or improving radiation safety programs, procedures, or operational controls * Hands-on experience working with radioactive materials, radiation detection instrumentation, and radiological survey techniques * Strong understanding of radiation protection principles, dosimetry, contamination control, and regulatory compliance frameworks #LI-Onsite #LI-TM1 Benefits Our total compensation package includes benefits, including but not limited to: • Medical, Dental, and Vision plans for employees and their families • 31 Days of PTO (21 vacation days and 10 sick days) • 10 Paid holidays, plus company-wide winter break • Up to 5% employer 401(k) match • Short term disability, long term disability, and life insurance • Paid parental leave and support (up to 16 weeks) • Annual wellness stipend Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.