Senior Mechanical Engineer

Reposted 16 Days Ago
Be an Early Applicant
Everett, WA, USA
In-Office
182K-214K Annually
Senior level
Energy
The Role
The Senior Mechanical Engineer will design subsystems for fusion generators, apply engineering principles, and troubleshoot issues, reporting to the Senior Manager of Engineering.
Summary Generated by Built In

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 own hardware designs for Helion's fusion generator prototypes. You will solve multidisciplinary engineering problems that are necessary for deploying fusion energy to the world and act as a culture driver on a growing team. You will report to the Senior Manager of Engineering, and this is an onsite role located at our Everett, WA office.

You Will:

  • Own and understand subsystem designs such as electromagnetic, structural, fluid, thermal and control systems, and improve their requirements

  • Learn from historical engineering approaches, design novel hardware, and test your solutions

  • Design fusion hardware within 3D CAD software (e.g. NX, Solidworks)

  • Perform analysis with tools like ANSYS and hold design reviews to gather feedback and iterate to a fully functioning system

  • Learn from experts to expand your engineering skillset and domain knowledge

  • Work hands-on alongside experienced technicians to implement your hardware designs

  • Troubleshoot hardware issues as they arise on integrated fusion generators

Required Skills:

  • Bachelor's degree in engineering

  • 8+ years of professional experience delivering on full-scope engineering projects (including schedule ownership)

  • Experience applying engineering first-principles and method-based thinking to challenging problems

  • Hands-on exposure to a variety of engineering disciplines (mechanical, electrical, fluids)

  • Advanced experience with CAD software (e.g. NX, Solidworks)

  • Moderate experience with FEA software (e.g. ANSYS, FEMAP)

  • Moderate experience with GD&T and generating engineering drawings per ASME Y14.5

#LI-Onsite #LI-KL1

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.

Skills Required

  • Bachelor's degree in engineering
  • 8+ years of professional experience delivering on full-scope engineering projects
  • Experience applying engineering first-principles and method-based thinking
  • Hands-on exposure to mechanical, electrical, and fluids engineering
  • Advanced experience with CAD software (e.g. NX, Solidworks)
  • Moderate experience with FEA software (e.g. ANSYS, FEMAP)
  • Moderate experience with GD&T and generating engineering drawings per ASME Y14.5

Helion Energy Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Helion Energy and has not been reviewed or approved by Helion Energy.

  • Fair & Transparent Compensation Compensation is considered competitive for many roles, with employer materials emphasizing competitively benchmarked pay. Total rewards commonly include salary plus equity and benefits that align with market expectations.
  • Healthcare Strength Health coverage includes medical, dental, and vision with options for fully employer‑paid premiums, HSA support, and core protections like life and disability. This breadth signals robust medical benefits for a growth‑stage company.
  • Equity Value & Accessibility Equity is broadly offered through stock options for all employees, positioning ownership as a meaningful part of total rewards. Employer communications consistently highlight equity participation as a differentiator.

Helion Energy Insights

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The Company
Everett, WA
100 Employees
Year Founded: 2013

What We Do

Helion is a fusion power company based in Everett, WA, with the mission to enable a future with unlimited clean energy. Our vision is a world with clean, reliable, and affordable electricity for everyone. Currently, we are scaling up our latest fusion prototype to make our vision a reality. We’re hiring brilliant scientists, engineers, and builders passionate about developing world-changing technologies. If that sounds like you, check out our open positions.

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