Question 1

What does the Principal Power Electronics Engineer role at Helion Energy involve?

Accepted Answer

The Principal Power Electronics Engineer at Helion Energy is responsible for the design, commissioning, and optimisation of the high-power electrical systems that drive Helion's fusion generators. The role covers energy delivery to pulsed magnetic coils, energy recovery systems, internal redistribution networks, and grid-tie infrastructure. Reporting to the Manager of Electrical Engineering at Helion's Everett, WA facility, the engineer will lead design reviews, own cost and schedule for assigned projects, and mentor junior electrical engineers across the team.

Question 2

What is Polaris and what role does power electronics play in Helion's fusion approach?

Accepted Answer

Polaris is Helion Energy's current fusion prototype and the machine on which the Principal Power Electronics Engineer will work. Helion uses a field-reversed configuration (FRC) approach in which plasma is compressed and heated by pulsed magnetic coils driven by extremely high-power electrical systems — capable of sub-millisecond pulses at up to 5 MA and 40 kV. The power electronics systems are therefore central to fusion performance, and their design, reliability, and energy recovery efficiency directly determine the viability of Helion's path to a commercial power plant.

Question 3

What is Helion Energy and what has it achieved so far?

Accepted Answer

Helion Energy is a private fusion power company founded in 2013 and based in Everett, Washington, with the mission to build the world's first fusion power plant. The company has raised over $1 billion from investors including Sam Altman, SoftBank, Lightspeed, Mithril, and Capricorn Investment Group. Its previous prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius. Helion is now operating Polaris, its next prototype, on the path to a commercial fusion generator.

Question 4

Is a salary published for the Principal Power Electronics Engineer role at Helion?

Accepted Answer

No salary range is published for this position. The benefits package includes 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 a company-wide winter break, up to 5% employer 401(k) matching, short and long-term disability and life insurance, paid parental leave of up to 16 weeks, and an annual wellness stipend. Candidates should discuss compensation directly with Helion during the hiring process.

Question 5

What experience and qualifications are required for this role?

Accepted Answer

Helion requires a minimum of 12 years of experience in power electronics, spanning design through to delivery, along with a Bachelor's or Master's degree in Electrical Engineering, Physics, or a related field. Candidates must have hands-on experience designing, fabricating, installing, and testing electronic systems, strong knowledge of solid-state switching technologies including IGBTs, MOSFETs, and SCRs, and proficiency with simulation tools including LTSpice, SIMetrix/SIMPLIS, Altium, and MATLAB. Advanced troubleshooting skills with benchtop instruments and PCB design software are also required.

Question 6

What level is the Principal Power Electronics Engineer position at Helion?

Accepted Answer

This is an explicitly principal-level individual contributor role at Helion Energy. With a 12-year minimum experience requirement, ownership of cost, schedule, and resource planning for assigned projects, and responsibility for leading design reviews and mentoring electrical engineers, the role sits at the top of the individual contributor track. It reports directly to the Manager of Electrical Engineering and carries significant programme-level accountability for the reliability and performance of Helion's fusion generator power systems.

Question 7

Where is the role based and is remote work available?

Accepted Answer

The Principal Power Electronics Engineer role is based onsite at Helion Energy's facility in Everett, Washington. The listing is explicitly tagged as onsite with no remote or hybrid option. This reflects the hands-on nature of the work, which involves commissioning, testing, and troubleshooting high-voltage pulsed power hardware directly at the Polaris prototype facility.

Question 8

Why is designing pulsed power systems for fusion particularly technically demanding?

Accepted Answer

Helion's pulsed power systems must deliver extraordinary energy densities — up to 5 MA and 40 kV in sub-millisecond pulses — while maintaining reliability across tens of thousands of machine shots. The switching technologies required operate at the limits of commercially available solid-state components, and energy recovery systems must capture and recirculate a large fraction of the pulse energy to achieve the energy economics necessary for a viable power plant. Achieving this at the required pulse repetition rate, with the fault tolerance and lifetime characteristics a commercial plant demands, represents some of the hardest electrical engineering challenges in the fusion sector.

Question 9

What disciplines and teams does the Principal Power Electronics Engineer collaborate with at Helion?

Accepted Answer

The role works across Helion's electrical engineering, mechanical engineering, plasma physics, and systems teams, and collaborates directly with designers on schematics and installation drawings. The engineer will interface with the broader fusion generator programme to ensure power systems support plasma performance targets and will work with procurement and construction teams on the delivery of major system components. Mentoring of junior electrical engineers is also a stated expectation, making cross-team knowledge transfer a core part of the role.

Question 10

How can I apply for the Principal Power Electronics Engineer role at Helion Energy?

Accepted Answer

The role is listed on Fusion Future at https://fusion-future.com/jobs/jobs-helion-principal-power-electronics-engineer, where you can follow the direct application link to Helion's careers portal. There is no published closing date, so candidates are encouraged to apply promptly. Helion states that it is an equal opportunity employer and will provide assistance or accommodations during the interview process on request.