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Senior Mechanical Engineer, Fusion Modules

Helion

Full-time|On-site|Everett, WA

About HelionHelion is a pioneering fusion power company situated in Everett, WA, dedicated to realizing the world's first fusion power plant. Our mission is to facilitate a future with boundless clean electricity, ensuring energy is both reliable and affordable for all. Founded in 2013, we have successfully secured over $1 billion in funding from esteemed in…

Jan 28, 2026

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Senior Manager of Mechanical Engineering - Modules

Helion

Full-time|On-site|Everett, WA

Join Helion as a Senior Manager of Mechanical Engineering specializing in Modules and lead our innovative engineering team. In this pivotal role, you will oversee the design, development, and implementation of advanced mechanical systems that drive our projects forward. Collaborate closely with cross-functional teams to ensure that our engineering solutions meet both performance and regulatory requirements.

Apr 3, 2026

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Senior Mechanical Engineer, Fluids

Helion Energy

Full-time|On-site|Everett, WA

About Helion EnergyHelion Energy is at the forefront of revolutionizing energy production. Based in Everett, WA, our mission is to construct the world's first fusion power plant, paving the way for a future marked by limitless clean electricity. We envision a world where energy is not just clean and reliable, but also affordable for everyone.Founded in 2013, we have successfully raised over $1 billion from esteemed investors, including Sam Altman, Mithril, and Capricorn Investment Group, as well as notable newcomers like SoftBank and Lightspeed. Our latest prototype, Trenta, has completed 10,000 high-power pulses, achieving plasma temperatures of 100 million degrees Celsius (9 keV). Currently, we are advancing with Polaris, our next prototype, on the journey to the world’s first fusion power plant.This is an exciting opportunity to join Helion Energy at a pivotal moment. You will face real-world engineering challenges within a team that values urgency, diligence, ownership, and the courage to share hard truths—qualities that are fundamental to achieving unprecedented goals. Together, we will redefine the future of energy because the world cannot afford to wait.

Dec 19, 2025

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Mechanical Engineering Manager - Modules

Helion

Full-time|On-site|Everett, WA

Join Helion as a Mechanical Engineering Manager overseeing the Modules division. In this pivotal role, you'll leverage your engineering expertise to lead a dynamic team in developing innovative mechanical systems. Your leadership will drive the project from conception through production, ensuring high-quality standards and efficiency.

Apr 3, 2026

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Senior Manager of Mechanical Engineering - Structures

Helion

Full-time|On-site|Everett, WA

About HelionHelion is a pioneering fusion power company located in Everett, WA, on a mission to construct the world's first fusion power plant, which will usher in an era of unlimited clean electricity. Our vision encompasses a future where energy is clean, reliable, and affordable for all.Since our inception in 2013, we have successfully secured over $1 billion in funding from esteemed investors, including Sam Altman, Mithril, and the Capricorn Investment Group, along with new backers like SoftBank and Lightspeed, to accelerate our advancements. Our latest prototype, Trenta, achieved 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are currently operating Polaris, our next prototype, as we move closer to realizing the world's first fusion power plant.Joining Helion at this critical juncture means engaging in meaningful challenges alongside a team that values urgency, precision, accountability, and a commitment to transparency—qualities essential for achieving unprecedented feats. Together, we will revolutionize the future of energy, as the world cannot afford to wait.

Jan 30, 2026

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Senior Mechanical Engineer at Helion | Everett, WA

Helion

Full-time|On-site|Everett, WA

Join Helion as a Senior Mechanical EngineerAt Helion, we are pioneering the future of energy as a fusion power company based in Everett, WA. Our mission is to construct the world’s first fusion power plant, creating a path toward unlimited clean electricity. We envision a future where energy is clean, reliable, and affordable for everyone.Founded in 2013, Helion has successfully secured over $1 billion from esteemed investors, including Sam Altman, Mithril, Capricorn Investment Group, SoftBank, and Lightspeed. Our latest prototype, Trenta, has achieved remarkable milestones, including 10,000 high-power pulses and plasma temperatures of 100 million degrees Celsius (9 keV). We are currently advancing with Polaris, our next-generation prototype, on our journey to realize the first fusion power plant.This is an exciting opportunity to join our team at Helion. You will engage in solving significant engineering challenges in an environment that emphasizes urgency, rigor, accountability, and the pursuit of hard truths—values that are crucial for achieving unprecedented goals. Together, we can transform the energy landscape, as the world is counting on us.

Dec 19, 2025

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Senior Mechanical Engineer, Diagnostics

Helion Energy

Full-time|On-site|Everett, WA

Join Helion EnergyAt Helion Energy, we are at the forefront of fusion power technology, based in Everett, WA. Our mission is to construct the world's first fusion power plant, paving the way for an era of limitless clean electricity. We envision a world where energy is clean, reliable, and affordable for all.Since our inception in 2013, we have successfully secured over $1 billion in funding from notable investors, including Sam Altman, Mithril, Capricorn Investment Group, SoftBank, and Lightspeed. Our latest prototype, Trenta, has achieved remarkable milestones, including 10,000 high-power pulses and plasma temperatures of 100 million degrees Celsius (9 keV). We are currently advancing our next prototype, Polaris, on our journey to establish the first fusion power plant.This is an exciting time to become part of the Helion team. You will address complex challenges alongside a dedicated group that values urgency, rigor, ownership, and transparency—principles essential for pioneering new energy solutions. Together, we are poised to transform the future of energy, because the world cannot wait.

Jul 14, 2025

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Senior Mechanical Engineer - Thermal Energy Solutions

Helion Energy, Inc.

Full-time|On-site|Everett, WA

About Helion Energy, Inc.At Helion, we are pioneering the future of energy as a leading fusion power company located in Everett, WA. Our mission is to construct the world's first fusion power plant, paving the way for a future of limitless clean electricity. We envision a world where energy is not only clean but also reliable and affordable for all.Since our inception in 2013, we have successfully secured over $1 billion in funding from prominent investors including Sam Altman, Mithril, and Capricorn Investment Group, as well as new partners like SoftBank and Lightspeed. Our latest prototype, Trenta, has achieved remarkable milestones, completing 10,000 high-power pulses and reaching plasma temperatures of 100 million degrees Celsius (9 keV). Currently, we are advancing our Polaris prototype, which is crucial to realizing our goal of establishing the first fusion power plant.Join us at this transformative moment in energy history. You will confront real-world engineering challenges alongside a dedicated team that values urgency, precision, accountability, and the commitment to deliver hard truths—qualities essential for our unprecedented mission. Together, we will reshape the energy landscape, for the world cannot afford to wait.

Dec 19, 2025

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Mechanical Engineering Manager, Structures

Helion

Full-time|On-site|Everett, WA

About HelionHelion is at the forefront of fusion power technology, headquartered in Everett, WA. Our mission is to construct the world's first fusion power plant, striving for a future where clean electricity is abundant and accessible to all. We envision a world powered by reliable and affordable energy, free from carbon emissions.Since our inception in 2013, we have successfully secured over $1 billion in funding from esteemed investors including Sam Altman, Mithril, Capricorn Investment Group, SoftBank, and Lightspeed. Our latest prototype, Trenta, achieved remarkable milestones with 10,000 high-power pulses and plasma temperatures reaching 100 million degrees Celsius (9 keV). Currently, we are advancing with Polaris, our next prototype, as we move closer to realizing the world's first fusion power facility.Joining Helion now means becoming part of a transformative journey. You will address real-world engineering challenges alongside a dedicated team that values urgency, diligence, accountability, and transparency—principles crucial for achieving unprecedented goals. Together, we are poised to redefine the energy landscape, because the world cannot afford to wait.

Dec 19, 2025

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Mechanical Engineering Technician Supervisor

Helion Energy

Full-time|On-site|Everett, WA

About Helion EnergyHelion Energy is at the forefront of fusion power technology, headquartered in Everett, WA. Our mission is to construct the world's first fusion power plant, paving the way for a future powered by limitless clean electricity. We envision a world where energy is clean, reliable, and affordable for everyone.Since our inception in 2013, we have successfully secured over $1 billion from esteemed investors, including Sam Altman, Mithril, Capricorn Investment Group, SoftBank, and Lightspeed. Our latest prototype, Trenta, has achieved remarkable milestones including 10,000 high-power pulses and plasma temperatures exceeding 100 million degrees Celsius (9 keV). We are currently progressing with Polaris, our next prototype, as we strive towards the realization of the world's first fusion power plant.Joining Helion at this pivotal moment means contributing to groundbreaking advancements with a team dedicated to urgency, rigor, ownership, and transparency—values essential for accomplishing unprecedented feats in energy innovation. Together, we will shape the future of energy, because the world cannot afford to wait.

Feb 4, 2026

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Director of Engineering, Fusion Plant Infrastructure

Helion Energy

Full-time|On-site|Everett, WA

Join Helion EnergyHelion Energy is at the forefront of the fusion power revolution, headquartered in Everett, WA. Our mission is to construct the world's first fusion power plant, aiming to provide limitless clean electricity. Imagine a future where energy is not only clean but also reliable and affordable for everyone.Since our inception in 2013, we have attracted over $1 billion in funding from esteemed investors like Sam Altman, Mithril, Capricorn Investment Group, SoftBank, and Lightspeed. Our latest prototype, Trenta, has successfully completed 10,000 high-power pulses, achieving plasma temperatures of 100 million degrees Celsius (9 keV). Currently, we are advancing with Polaris, our subsequent prototype, as we strive towards realizing the world’s first fusion power plant.This is an exciting time to join Helion Energy. You will face real-world challenges alongside a team that values urgency, meticulousness, accountability, and a commitment to transparency—principles essential for accomplishing what has never been achieved before. Together, we are poised to redefine the future of energy, because the world demands it.Role OverviewAs the Director of Engineering, you will lead the design and implementation of essential Balance of Plant (BoP) systems that facilitate fusion power generation. From radiation shielding and gas handling to thermal management and heat recovery, you will be instrumental in converting fusion physics into practical energy solutions. You will build and manage dynamic teams that seamlessly integrate Helion’s fusion generators with energy management systems at a large scale. This unique role allows you to spearhead multidisciplinary engineering initiatives at the frontier of technology, with direct responsibility for the systems that will shape the world’s first fusion power plant. This position is based onsite at our Everett, WA office and reports directly to the VP of Engineering.Key Responsibilities:Lead and cultivate high-performing engineering teams across mechanical, thermal, and fluid systems.Oversee the design and implementation of critical plant systems, including radiation shielding, fuel and exhaust gas systems, vacuum infrastructure, and thermal management.Collaborate with nuclear, magnet, and systems engineering teams to create a cohesive integration of fusion generators.Drive cross-functional engineering efforts from initial concept through detailed design, manufacturing, and testing phases.Establish high standards for technical rigor, documentation, and accountability to ensure safety, scalability, and reliability.Continuously elevate expectations for ownership, execution speed, and design clarity within your teams.

Oct 24, 2025

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Mechanical Supplier Development Engineer

Helion Energy

Full-time|On-site|Everett, WA

Join Helion EnergyAt Helion, we are pioneering the future of energy through the development of the world’s first fusion power plant, based in Everett, WA. Our commitment is to provide an endless supply of clean, reliable, and affordable electricity for all.Founded in 2013, we have raised over $1 billion from visionary investors, including Sam Altman, Mithril, and SoftBank. Our latest prototype, Trenta, has achieved remarkable milestones, including 10,000 high-power pulses and plasma temperatures reaching 100 million degrees Celsius (9 keV). We are now advancing with Polaris, our next prototype, on the journey towards operationalizing fusion energy.This is an exciting opportunity to be part of a transformative team. You will engage with real-world challenges and contribute to our mission, embracing values of urgency, rigor, ownership, and transparency—essential for achieving unprecedented goals in energy production.Your Role:As a Supplier Development Engineer, you will be crucial in collaborating with suppliers to manufacture components for our fusion generators. Your responsibilities will include resolving technical issues, enhancing supplier quality systems, and facilitating the transition from rapid prototyping to large-scale manufacturing. This position will report to the Senior Manager of Engineering and is based onsite in Everett, WA.Key Responsibilities:Collaborate closely with design engineers to fully understand the design intent for parts, assemblies, and subsystems.Evaluate supplier manufacturing processes and quality systems while working in partnership with the procurement team.Assist in the product ramp-up from initial introduction to high-volume production.Establish technical and quality specifications for suppliers based on engineering and program needs.Implement and oversee the Production Part Approval Process (PPAP) with selected suppliers to facilitate rapid production.Ensure suppliers are well-informed on requirements for documentation submissions, including first article inspection reports and quality documentation.Develop and authorize process controls for critical characteristics.Propose technical enhancements to minimize risks and potential defects.

Dec 19, 2025

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Mechanical Engineer at Helion | Everett, WA

Helion

Full-time|On-site|Everett, WA

About HelionHelion is at the forefront of the fusion power revolution, headquartered in Everett, WA. Our mission is to construct the world's inaugural fusion power plant, paving the way for a future with limitless clean electricity. We envision a world where energy is clean, dependable, and affordable for all.Since our inception in 2013, Helion has successfully raised over $1 billion from esteemed investors including Sam Altman, Mithril, Capricorn Investment Group, SoftBank, and Lightspeed, driving our ambitious goals forward. Our latest prototype, Trenta, achieved an impressive 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). Currently, we are advancing with Polaris, our next prototype, on our journey towards establishing the world’s first fusion power plant.This is a critical moment to join Helion. You'll engage with real-world challenges within a team that values urgency, rigor, ownership, and a commitment to transparency—principles essential for accomplishing unprecedented feats. Together, we can transform the energy landscape, as the world cannot afford to wait.

Dec 19, 2025

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Process Engineer, Fusion Fuel Cycle

Helion Energy

Full-time|On-site|Everett, WA

Helion Energy is developing fusion energy technology with the goal of building the world’s first fusion power plant. Based in Everett, WA, the company’s mission is to deliver clean, reliable, and affordable electricity. Since its founding in 2013, Helion has advanced its technology through prototypes like Trenta, which achieved 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius. The next prototype, Polaris, is underway, moving the team closer to commercial fusion power. The team at Helion values urgency, precision, accountability, and a readiness to tackle complex challenges. The work environment encourages collaboration across engineering and scientific disciplines. Role overview The Process Engineer, Fusion Fuel Cycle, will join the Fuel Cycle team in Everett, WA. This onsite position manages systems from early design through commissioning and reports to the Fuel Cycle Manager. The role involves working closely with engineers, scientists, and technicians to develop the first continuous fusion fuel cycle. What you will do Direct the design and integration of fuel cycle engineering units, covering process design, procurement, installation, and commissioning. Perform detailed design work for process equipment such as columns, reactors, membranes, heaters, pumps, and piping, handling a range of operating conditions including ambient, cryogenic, and vacuum. Use process simulation tools to support design development, integration, and case studies. Prepare engineering deliverables such as process flow diagrams (PFDs), piping and instrumentation diagrams (P&IDs), heat and material balances (H&MBs), HAZOPs, and sizing calculations. Collaborate with mechanical, electrical, and controls engineers to deliver integrated process designs. Lead design reviews and incorporate feedback to refine and validate system solutions.

Apr 24, 2026

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R&D Engineer - Fusion Generator Operations

Helion Energy, Inc.

Full-time|On-site|Everett, WA

Helion Energy, Inc. seeks an R&D Engineer for Fusion Generator Operations in Everett, WA. This role centers on advancing and refining fusion generator systems to support the company's goal of providing sustainable, clean energy. Key Responsibilities Collaborate with engineers and scientists to design, optimize, and test fusion generator systems. Help bring concepts from theoretical models into practical, operational solutions. Support research and development projects that contribute to the future of fusion energy. Role Impact Work in this position will have a direct effect on Helion Energy’s progress in fusion technology, connecting research efforts with real-world applications.

Apr 27, 2026

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R&D Engineering Manager - Fusion Machine Operations

Helion Energy

Full-time|On-site|Everett, WA

Join Helion Energy as an R&D Engineering Manager in Fusion Machine Operations, where you'll lead cutting-edge projects that advance the frontiers of fusion technology. This role involves overseeing the development, testing, and operational management of fusion machines, ensuring high performance and safety standards are met. You will collaborate with a talented team of engineers and scientists, driving innovation and efficiency in our research and development initiatives.

Mar 27, 2026

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Build Engineer at Helion | Everett, WA

Helion

Full-time|On-site|Everett, WA

About HelionHelion is a pioneering fusion power company located in Everett, WA, dedicated to constructing the world's first fusion power plant. Our mission is to provide unlimited clean electricity, paving the way for a sustainable and affordable energy future for all.Since our inception in 2013, we have successfully secured over $1 billion in funding from prominent investors such as Sam Altman, Mithril, Capricorn Investment Group, SoftBank, and Lightspeed. Our latest prototype, Trenta, has achieved remarkable milestones, including 10,000 high-power pulses and plasma temperatures reaching 100 million degrees Celsius (9 keV). Currently, we are advancing with Polaris, our next prototype, as we progress toward realizing the world’s first fusion power plant.Joining Helion at this transformative time means taking on significant real-world challenges alongside a team that values urgency, rigor, accountability, and a commitment to transparency. Together, we are poised to redefine the future of energy, because the world cannot afford to wait.

Jan 30, 2026

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Integration and Test Engineer at Helion | Everett, WA

Helion

Full-time|On-site|Everett, WA

About HelionHelion is an innovative fusion power company located in Everett, WA, dedicated to constructing the world’s first fusion power plant to usher in a future of limitless clean energy. We envision a world powered by clean, reliable, and affordable energy accessible to all.Since our inception in 2013, we have successfully raised over $1 billion from esteemed investors including Sam Altman, Mithril, and Capricorn Investment Group, along with new partners such as SoftBank and Lightspeed, to accelerate our advancements. Our latest prototype, Trenta, has already achieved remarkable milestones with 10,000 high-power pulses and plasma temperatures soaring to 100 million degrees Celsius (9 keV). Currently, we are advancing with Polaris, our next prototype on our journey to the first fusion power plant.Now is a crucial moment to join Helion. You will engage in real-world challenges alongside a team that values urgency, precision, accountability, and a commitment to transparency — principles that are vital to accomplishing what has never been achieved before. Together, we will transform the future of energy because the world cannot afford to wait.Responsibilities:Lead the integration sequence and oversee daily assembly operations across generator subsystems, including vacuum systems, electromagnets, high-voltage capacitor systems, controls, diagnostics, and radiation safety.Develop and maintain a multidisciplinary schedule on a daily and weekly basis to ensure the full completion of builds.Define, plan, and execute integrated subsystem tests in collaboration with various subsystem owners.Conduct build completion reviews to ensure operational readiness and testing preparedness.Collaborate with production, testing, and engineering teams to enhance integration and build processes.Draft work instructions for technician teams to facilitate both standard builds and the resolution of non-conformances.Lead root cause analyses and implement corrective actions during the integration and build phases.Develop strategies for hardware upgrades, replacements, and integration improvements to maximize operational uptime.

Feb 26, 2026

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Senior Semiconductor Device Engineer

Helion

Full-time|On-site|Everett, WA

About HelionAt Helion, we are pioneering the future of energy as a leading fusion power company located in Everett, WA. Our mission is to create the world's first fusion power plant, which will provide limitless clean electricity. We envision a future where energy is clean, reliable, and affordable for everyone.Since our inception in 2013, we have successfully attracted over $1 billion from esteemed investors including Sam Altman, Mithril, and Capricorn Investment Group, alongside newcomers such as SoftBank and Lightspeed. Our latest prototype, Trenta, achieved an impressive milestone of 10,000 high-power pulses, reaching plasma temperatures of 100 million degrees Celsius (9 keV). Currently, we are advancing with Polaris, our next prototype on the journey towards realizing the world's first fusion power plant.This is an exciting time to join Helion. You will have the opportunity to address significant challenges as part of a team that values urgency, precision, accountability, and the courage to communicate hard truths—attributes crucial for accomplishing unprecedented feats. Together, we will redefine the future of energy because the world cannot afford to wait.

Dec 19, 2025

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Director of Fusion Plant Operations

Helion Energy, Inc.

Full-time|On-site|Everett, WA

Join Helion Energy, Inc.At Helion, we are at the forefront of revolutionizing energy production, spearheading the development of the world’s first fusion power plant from our base in Everett, WA. Our mission is to create a sustainable future powered by limitless clean electricity, ensuring that everyone benefits from affordable and reliable energy.Since our inception in 2013, we have successfully raised over $1 billion from esteemed investors such as Sam Altman, Mithril, Capricorn Investment Group, SoftBank, and Lightspeed, propelling our ambitious goals. Our latest prototype, Trenta, has achieved significant milestones, including completing 10,000 high-power pulses and achieving plasma temperatures of 100 million degrees Celsius (9 keV). Currently, we are progressing with Polaris, our next generation prototype, paving the way towards the world’s first commercial fusion power plant.This is an exciting opportunity to become part of Helion during this pivotal period. You will address real-world challenges alongside a team that values urgency, rigor, and accountability, essential attributes for achieving unprecedented success in energy innovation.Your Role:As the Director of Fusion Plant Operations, you will play a crucial role in accelerating Helion’s fusion technology development while establishing the operational framework to manage our groundbreaking commercial fusion power plants.Your responsibilities will include leading innovative efforts across our fusion test platforms, integrated devices, and various research initiatives aimed at delivering fusion energy to the grid by 2028. You will define the pace of technology advancement, build effective teams, and develop processes and training that foster a culture of excellence necessary for deploying and operating commercial-scale fusion power plants.This position combines elements of science, engineering, and operations, and reports directly to the CEO.Key Responsibilities:Build and cultivate the Deployment team, establishing training and operational processes for the first fusion power plant operators.Develop a strategic roadmap for machine commissioning and testing capabilities, outlining the pathway for operational fusion power plants.Oversee the design and implementation of operational infrastructure, safety protocols, and training programs to ensure effective plant management.

May 20, 2025

Process Engineer, Fusion Fuel Cycle

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