Joblaze summary

The Principal Nuclear Materials Engineer at Helion focuses on developing and analyzing materials designed for high-radiation environments, providing critical insights to engineering teams on material performance under radiation exposure. This role requires extensive expertise in radiation effects, particularly with metals and ceramics, alongside strong data analysis skills using programming languages like Python or MATLAB. Ideal candidates will have over 15 years of relevant experience, particularly in nuclear engineering or materials science, and a proven track record in handling radioactive materials. Helion's collaborative environment emphasizes urgency and innovation as the company striv

Joblaze insights

Listed about a month ago — first seen on Joblaze September 3, 2026. Last confirmed on Helion's careers page October 27, 2026.
Python appears in 19.2% of 213 comparable principal other roles in United States; Materials Science appears in 0.5% of 213 comparable principal other roles in United States.

Quick facts

Is the Principal Nuclear Materials Engineer role remote?: No — this is an on-site role in Everett, WA.
How much experience is required?: At least 15 years of relevant experience for this Principal Nuclear Materials Engineer role.
Where is the role based?: Helion is hiring for this position in Everett, WA.
What's the tech stack?: Joblaze extracted these technologies from the posting: C++, MATLAB, Materials Science, Nuclear Engineering, Python.
What seniority level is this role?: Helion targets principal-level candidates for this position.
Is this full-time or contract?: Full-time for this Principal Nuclear Materials Engineer role at Helion.

From the original posting

What You Will Be Doing:

You will play a key role in developing designs and materials suited for high-radiation environments, providing analysis and guidance to engineers on the behavior and performance of a wide range of materials under radiation exposure. In this onsite role, based at our Everett, WA office, you will report to the Director of Materials Science and collaborate closely with cross-functional teams to advance Helion’s mission.

You Will:

Advise engineering design decisions based on radiation effects (due to neutrons) on materials used within the radiation shield vault, e.g., metals used in magnet coils, dielectrics used for structure, and ceramics
Partner with neutronics engineers to predict dpa, analyze, model, and predict macroscopic effects on material properties including thermal conductivity, electrical resistivity, and mechanical strength. Assess system-level radiation risk
Oversee testing campaigns to quantify impact of radiation on material properties
Lead strategic projects to expand capabilities
Perform literature reviews on radiation effects on materials of interest and distill the information into summaries for non-nuclear engineers
Operate in an environment with obstacles and changing requirements. Balance risks without compromising the delivery
Partner with other internal Helion teams, external vendors, national laboratories, and universities to gather the required capabilities. Develop your network and represent Helion at technical meetings and conferences

Required Skills:

A professional understanding of radiation effects on materials, typically demonstrated by a degree in nuclear engineering, materials science, physics, or related discipline and 15+ years of hands-on work
15+ years of experience handling radioactive material
8+ years of experience working on non-aqueous corrosion and environmentally assisted degradation mechanisms (e.g., stress corrosion cracking, creep, accelerated fatigue)
8+ years of experience working on neutron interactions leading to e.g., material transmutation or helium bubble generation
8+ years of experience performing data analysis with a common coding language (Python, MATLAB, C++), data presentation, technical communication, and writing
Data presentation should include rigorous consideration of uncertainty and statistics

#LI-TM1 #LI-Onsite

Medical, Dental, and Vision plans for employees and their families
10 Paid holidays, plus company-wide winter break
Up to 5% employer 401(k) match
Annual wellness stipend

Standard company text repeated across Helion's postings is omitted here.

Principal Nuclear Materials Engineer

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