Senior Materials Chemist

Helion; Everett (WA); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Medical, Dental, and Vision plans

31 Days of PTO (vacation + sick)

10 paid holidays, winter break

Up to 5% 401(k) match

Short/Long term disability and life保险

Paid parental leave

Annual wellness stipend

Job summary

Helion in Everett, WA seeks a chemistry–materials scientist to own coolant/fluids interactions with materials and components. You will quantify degradation mechanisms and define compatibility limits, developing practical mitigation strategies to improve system reliability and lifetime.

This onsite role reports to the Materials Science Manager and spans chemistry, materials science, and hardware engineering to directly impact Helion's fusion systems.

Qualifications

• MS or PhD in Chemistry, Materials Chemistry, Corrosion Science, Chemical Engineering, or related field.
• 5+ years of experience in corrosion/electrochemistry, coolant or process fluid chemistry, materials compatibility testing, or degradation and failure analysis in demanding environments.
• Demonstrated ability to design experiments, analyze multi-variable datasets, and communicate actionable results to engineering teams.

Responsibilities

• Own the chemistry-driven understanding of how coolants and process fluids interact with materials and components.
• Quantify degradation mechanisms, define compatibility limits, and develop practical mitigation strategies.
• Develop test conditions reflecting relevant operating environments (temperature, pressure, flow, impurity levels, cycling).
• Develop and validate mitigation strategies.
• Drive cross-functional integration and execution.

Skills

Corrosion science

Experiment design

Data analysis

Education

MS or PhD in Chemistry/Materials/Corrosion/Engineering

Job description

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 $1.5 billion from long‑time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors including Thrive Capital, LightSpeed Venture Capital, SoftBank, and others to propel us forward. Our current prototype, Polaris, has reached record‑breaking plasma temperatures of 150 million degrees Celsius (13 keV). Helion is continuing to iterate and on the path to the world's first fusion power plant, Orion. 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 own the chemistry‑driven understanding of how coolants and process fluids interact with materials and components. You will quantify degradation mechanisms, define compatibility limits, and develop practical mitigation strategies that improve system reliability and lifetime.

This role sits at the intersection of chemistry, materials science, and hardware engineering, and directly impacts the performance and durability of Helion's fusion systems. You will report to the Materials Science Manager and this is an onsite role located at our Everett, WA office.

You Will

• Quantify coolant‑driven degradation and failure
• Design and execute experimental programs to evaluate coolant and fluid impacts on materials, including corrosion, erosion, deposition/retention, polymer swelling/attack, and contamination transport
• Develop test conditions that reflect relevant operating environments (temperature, pressure, flow, impurity levels, and cycling)
• Develop and validate mitigation strategies
• Drive cross‑functional integration and execution

Required Skills

• MS or PhD in Chemistry, Materials Chemistry, Corrosion Science, Chemical Engineering, or a related field (or equivalent practical experience)
• 5+ years of experience in corrosion/electrochemistry, coolant or process fluid chemistry, materials compatibility testing, or degradation and failure analysis in demanding environments
• Demonstrated ability to design experiments, analyze multi‑variable datasets, and communicate actionable results to engineering teams

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 values 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.