Toolmill Briefswhat companies are building, read from their hiring

Company brief · updated 2026-10-18

Helion Energy

helionenergy.com · Industrials

65open roles
23new in 30 days
9closed in 30 days
0remote-eligible
acceleratinghiring velocity

What they're building

Orion plant-level systems engineering and plant control software strong signal

Today: Orion, the planned fusion power plant, following the Polaris prototype

Roles: Systems Engineer · Senior Systems Engineer · Senior Software Engineer, Plant Control · Senior Manager, Software Engineering, Plant Control

Requirements mention: system architecture · top-level requirements · Interface Control Documents · distributed control systems · SCADA · supervisory automation

Inference: Helion is staffing Orion's plant requirements and the software that will operate the plant at the same time. This suggests Orion work now includes defining subsystem interfaces and plant control.

Capacitor bank modules and generator hardware moving from prototype toward production strong signal

Today: Pulsed-power capacitor banks in Helion's fusion generator prototypes

Roles: Director of Engineering, Modules · Senior Mechanical Engineer, Modules · Senior Supplier Development Engineer, Mechanical · Senior Manufacturing Engineer

Requirements mention: prototype to production · high-volume hardware production · design-for-manufacture · Design and manufacture tooling

Inference: the postings point to capacitor bank modules being designed for production at scale, with supplier development and tooling roles alongside. The Senior Supplier Development Engineer posting describes a move 'from rapid prototyping to mass generator manufacturing.'

Pulsed-power and power electronics for plasma compression strong signal

Today: The Polaris prototype, which the site says demonstrated measurable D-T fusion

Roles: Power Electronics Engineer · Principal Power Electronics Engineer · Senior Power Electronics Engineer · Principal Electrical Engineer · Senior Manager, Electrical Engineering

Requirements mention: pulsed-power systems · high-energy power electronics · control and protection of high-energy systems · switching topologies

Inference: the Electrical Engineering postings suggest the pulsed-power and power conversion hardware that drives the machines is a main line of work. A Senior Manager role lists production ramp and grid tie-in among its requirements.

Plasma diagnostics and experimental science on fusion machines moderate signal

Today: Fusion machines and test beds, including the Polaris prototype

Roles: Experimental Scientist · Senior Experimental Scientist · Principal Experimental Scientist · Plasma Diagnostics Summer 2027 Intern

Requirements mention: plasma diagnostics · interferometry · Langmuir probes · spectroscopy

Inference: diagnostic work on the fusion machines is staffed at several levels, from intern to principal. The Science department has 10 open roles in total.

Materials for fusion generator environments, including dielectrics and health monitoring moderate signal

Today: Fusion generator components such as first wall, magnets, insulators and capacitors

Roles: Senior Materials Engineer, Dielectrics · Senior Materials Engineer, Material Health Monitoring · Senior Materials Engineer, Diagnostics · Senior Manager, Materials Science

Requirements mention: radiation effects testing and characterization · in-situ monitoring technologies · Materials diagnostics / NDE / SHM · high-voltage dielectric insulating materials

Inference: the Material Science postings point to work on dielectric materials and on monitoring materials degradation in generator components. The Senior Manager, Materials Science role leads the Materials Interactions and Diagnostics team.

Production capacity for high-voltage test, assembly and capacitor manufacturing moderate signal

Today: In-house build and test of fusion generators and high-voltage capacitors

Roles: Second Shift High Voltage Test Technician · High Voltage Test Technician · Second Shift Integration Technician, Bank Build · Welder · Machine Shop Supervisor · Senior Maintenance Technician · Senior Controls Technician

Requirements mention: high-voltage testing · WABO certification · welding and fabrication · PLC/HMI

Inference: the Production department has 6 open roles, including two second-shift postings, and Capacitor Manufacturing has 2 more. This suggests test and assembly work for generators is being staffed on more than one shift.

Where the headcount is going

DepartmentOpen
Electrical Engineering14
Material Science12
Science10
Mechanical Engineering7
Research & Development 6
Production5
Supply Chain1
Information Security & Technology 1
Technology1
Software Engineering1
Fuel Cycle1
Facilities1

Of 68 open roles, 62 are in Everett, WA and are mostly hardware engineering and science: Electrical Engineering (14), Material Science (12), Science (10) and Mechanical Engineering (9). The 6 Seattle, WA roles are corporate and IT functions.

Who they need

Seniority: 27 senior, 8 principal, 8 manager, 14 mid, 6 intern, 2 director, 3 unknown.

Skills named most: Python, MATLAB, pulsed-power systems, power electronics, CAD software, high-voltage capacitor systems, FPGA, C++, vacuum systems, troubleshooting, design reviews, capacitor banks

Locations: All postings are on-site. 62 are listed as Everett, WA and 6 as Seattle, WA. No roles are listed as remote.

How to use this

If you're applying: Start with the largest groups: Electrical Engineering, Material Science and Science in Everett, WA. Check each posting's hard requirements, such as degree, certification or location, before applying.

If you're selling or recruiting: 31 roles opened in the last 30 days, against 5 in the prior 30 days, with 2 closed. Most openings are engineering, science and production roles in Everett, WA. The postings support conversations about Orion plant systems and control software, capacitor bank modules moving toward production, and second-shift production staffing.

Get told when Helion Energy opens new roles.

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Open roles (65)

TitleDepartmentLocationPosted
Senior Semiconductor Device EngineerElectrical EngineeringEverett, WA2026-10-23
Director of Semiconductor TechnologyElectrical EngineeringEverett, WA2026-10-23
Procurement Manager Supply ChainEverett, WA2026-10-20
Manager, Machine Maintenance and Integration Research & Development Everett, WA2026-10-20
Senior Materials Engineer, CeramicsMaterial ScienceEverett, WA2026-10-13
Senior Engineering TechnologistMaterial ScienceEverett, WA2026-10-08
Enterprise Applications AdministratorInformation Security & Technology Seattle, WA2026-10-08
R&D Lead – Control SystemsResearch & Development Everett, WA2026-10-08
Senior Systems Administrator TechnologySeattle, WA2026-10-07
Senior Manufacturing Engineer Mechanical EngineeringEverett, WA2026-10-06
Manufacturing Engineer, Hardware Build & Integration Mechanical EngineeringEverett, WA2026-10-06
Second Shift High Voltage Test Technician ProductionEverett, WA2026-10-02
Second Shift Integration Technician, Bank BuildProductionEverett, WA2026-10-01
Integration and Test Engineer Mechanical EngineeringEverett, WA2026-10-01
Computational Plasma Research Summer 2027 InternScienceEverett, WA2026-09-30
Plasma Diagnostics Summer 2027 InternScienceEverett, WA2026-09-30
R&D Test EngineerResearch & Development Everett, WA2026-09-30
Senior Software Engineer, Plant ControlSoftware EngineeringEverett, WA2026-09-30
Materials Engineering Summer 2027 InternMaterial ScienceEverett, WA2026-09-29
Process Engineering Summer 2027 Intern Fuel CycleEverett, WA2026-09-29
Electrical Engineering Summer 2027 InternElectrical EngineeringEverett, WA2026-09-25
Facilities Operations ManagerFacilitiesEverett, WA2026-09-25
High Voltage Test Technician ProductionEverett, WA2026-09-24
Senior Controls TechnicianCapacitor ManufacturingEverett, WA2026-09-23
Senior Electrical Engineer – Dielectric Materials DevelopmentMaterial ScienceEverett, WA2026-09-23
Power Electronics EngineerElectrical EngineeringEverett, WA2026-09-22
WelderProductionEverett, WA2026-09-22
Principal Compensation PartnerPeopleSeattle, WA2026-09-21
Machine Shop SupervisorProductionEverett, WA2026-09-21
Senior AP AnalystFinanceSeattle, WA2026-09-21
Senior Supplier Development Engineer, Mechanical Mechanical EngineeringEverett, WA2026-09-15
Senior Materials Engineer, Material Health MonitoringMaterial ScienceEverett, WA2026-09-15
Corporate Communications SpecialistCommunicationsSeattle, WA2026-09-08
Manager, Electrical EngineeringElectrical EngineeringEverett, WA2026-08-26
Principal Applied Plasma Data ScientistScienceEverett, WA2026-08-18
Senior Applied Plasma Data ScientistScienceEverett, WA2026-08-18
Senior Manager, Software EngineeringElectrical EngineeringEverett, WA2026-08-17
Senior Mechanical Engineer, Modules Mechanical EngineeringEverett, WA2026-08-17
Senior Mechanical Engineer Mechanical EngineeringEverett, WA2026-07-24
R&D OperatorResearch & Development Everett, WA2026-07-21
Director of Engineering, Modules Electrical EngineeringEverett, WA2026-07-17
Experimental ScientistScienceEverett, WA2026-06-24
Senior Materials Engineer, DielectricsMaterial ScienceEverett, WA2026-06-22
Senior Experimental ScientistScienceEverett, WA2026-06-01
Senior Manager, Materials ScienceMaterial ScienceEverett, WA2026-06-01
Materials EngineerMaterial ScienceEverett, WA2026-05-21
Director of Plasma PhysicsScienceEverett, WA2026-05-17
Senior Materials TechnologistMaterial ScienceEverett, WA2026-05-06
Principal Experimental Scientist - RFScienceEverett, WA2026-05-06
Senior Materials Engineer, DiagnosticsMaterial ScienceEverett, WA2026-04-08
Senior Multiphysics Modeling EngineerMaterial ScienceEverett, WA2026-03-11
Mechanical Engineer Mechanical EngineeringEverett, WA2026-03-04
Principal Electrical Engineer - RF ScienceEverett, WA2026-03-02
Electrical EngineerElectrical EngineeringEverett, WA2026-02-26
R&D Hardware Test & Development ManagerResearch & Development Everett, WA2026-02-13
R&D Manager – Control SystemsResearch & Development Everett, WA2026-01-14
Senior Test EngineerElectrical EngineeringEverett, WA2025-12-19
Senior Manager, Electrical EngineeringElectrical EngineeringEverett, WA2025-12-19
Principal Power Electronics EngineerElectrical EngineeringEverett, WA2025-12-19
Principal Electrical EngineerElectrical EngineeringEverett, WA2025-12-19
HERCULES Proposal Submission Form All DepartmentsEverett, WA2025-10-17
Principal Nuclear Materials EngineerMaterial ScienceEverett, WA2025-10-01
Principal Experimental ScientistScienceEverett, WA2025-08-08
Senior Power Electronics EngineerElectrical EngineeringEverett, WA2024-12-19
Senior Electrical EngineerElectrical EngineeringEverett, WA2024-12-19