Integration and Test Engineer

About the role

Location: Everett, WA. Employment Type: Full time. Location Type: On-site. Department: Mechanical Engineering. Helion is 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. Since Helion's founding in 2013, we have raised $1.5 billion from investors such as Sam Altman, Mithril, Capricorn Investment Group, Thrive Capital, LightSpeed Venture Capital, SoftBank, and others. 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.

Responsibilities

• Lead cross-subsystem integration and test activities for Helion’s current and future fusion generator prototypes.
• Own the integration sequence and day-to-day execution of assembly across generator subsystems, including vacuum systems, electromagnets, high-voltage capacitor systems, controls, diagnostics, and radiation safety.
• Develop and manage a multidisciplinary schedule on a daily and weekly basis to ensure full build completion.
• Define, plan, and execute integrated subsystem tests in collaboration with subsystem owners.
• Lead build completion reviews to verify operational readiness and test preparedness.
• Collaborate with production, test, and engineering teams to improve integration and build processes.
• Author work instructions for technician teams to support both nominal builds and non-conformance resolution.
• Lead root cause analyses and implement corrective actions during integration and build.
• Drive strategies for hardware upgrades, replacements, and integration improvements to maximize uptime.
• Perform trade studies on build sequencing, hardware prioritization, and resource allocation to influence Helion’s system development approach.

Requirements

• Bachelor’s degree in Engineering or a related field.
• 3+ years of professional experience delivering full-scope engineering projects, including schedule ownership.
• Demonstrated use of engineering first-principles and structured problem-solving.
• Hands-on experience across multiple engineering disciplines such as mechanical, electrical, and fluids.
• Effective technical communication across functional and organizational levels.

Benefits

• 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.

Pay

$138K – $182K