Senior Mechanical Engineer, Modules

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 hardware designs for Helion's fusion generator prototypes. You will be working with mechanical engineers, electrical engineers, manufacturing engineers, and production technicians, to implement and troubleshoot high-voltage and low-voltage hardware architectures for pulsed power capacitor banks that are designed for production at scale.

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. This role is onsite at our headquarters in Everett, WA. 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 Optimize sub-system and component designs to scale for high volume manufacturing Design fusion hardware within 3D CAD software (e.g.

NX, Solidworks) Perform analysis with tools like ANSYS and COMSOL Multiphysics, and hold design reviews to gather feedback and iterate to a fully functioning system Required Skills: Bachelor's degree in engineering 7+ 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, thermal) Experience designing, testing, and launching production hardware at scale Moderate understanding of engineering physics fundamentals (mechanics of materials, circuits), and the ability to apply those principles to the design of high-voltage and pulsed power hardware Advanced experience with CAD software (e.g.

NX, Solidworks) Moderate experience with GD&T and generating engineering drawings per ASME Y14.5 Moderate experience with FEA software (e.g. ANSYS, FEMAP, COMSOL) #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.