Fusion Energy Jobs

Fusion energy is the power released when light hydrogen isotopes merge at around 150 million °C, with the hot plasma held either by magnetic fields in tokamaks and stellarators or by laser and pulsed-power compression in inertial systems. Fission splits heavy uranium nuclei in a self-sustaining chain reaction; fusion joins light ones, and the reaction stops as soon as confinement fails. No fusion plant has yet sold a kilowatt-hour to any grid, and still the private companies building them employ over 16,000 people and raised a record $4.48 billion in the 12 months to July 2026. The prize they are chasing is firm, low-carbon electricity that runs regardless of weather, from compact sites, with fuel drawn from water and lithium: the role gas turbines play beside wind and solar today. That is why Google, Eni, and Microsoft have signed power deals with plants that do not yet exist, and why the hiring is happening years before the revenue.

Rejobs files fusion under clean energy, not renewables. The EU's Renewable Energy Directive counts wind, solar, geothermal, ocean, hydropower, and biomass sources, and fusion is not among them. The distinction matters less for a career than the honest one underneath it: commercial timelines are contested, the companies set their own milestones, and a job in fusion today is a job building and testing machines, not running power stations.

How many people work in fusion

The Fusion Industry Association's 2026 global report surveyed 56 private fusion companies and counted cumulative funding of $14.24 billion since its first survey. Those are the industry's own numbers, collected from its members, but the hiring behind them is visible from outside. In late October 2026 Commonwealth Fusion Systems alone listed 136 open positions, most of them in manufacturing, assembly, and engineering rather than physics.

Public programmes employ a substantial workforce of their own, longer-established and more stable. The UK Atomic Energy Authority puts its own headcount at 2,600 and describes itself as the largest single fusion organisation in the world. Germany's Max Planck Institute for Plasma Physics (IPP) had 1,270 employees in July 2026, 780 in Garching near Munich and 490 in Greifswald, where the Wendelstein 7-X stellarator runs. ITER directly employed 1,102 staff at the end of 2023, but around 6,500 people worked on the site in southern France once contractors, project associates, and Fusion for Energy staff were counted (the most recent official figures, now nearly three years old). The EUROfusion consortium links more than 4,000 researchers, staff, and students across 31 institutes in 29 European countries, according to a December 2023 count.

The supplier base is growing too. Fusion companies spent $538 million with their suppliers in 2025, 25% more than a year earlier, according to an FIA survey of 25 fusion companies and 67 suppliers. Many of those suppliers also build magnets, vacuum chambers, and power supplies for medical, semiconductor, and research customers, so plenty of people working on fusion hardware do not have "fusion" in their employer's name.

Magnetic and inertial confinement: two different industries

Of the companies in the FIA survey, 48% pursue magnetic confinement and 21% inertial confinement, with the rest on hybrids such as magneto-inertial designs. The split decides what an employer needs from you.

Magnetic confinement holds plasma in a doughnut-shaped vacuum vessel using superconducting magnets. Tokamaks (CFS, Tokamak Energy, ITER) drive a current through the plasma itself; stellarators (Proxima Fusion, Type One Energy, Thea Energy, Gauss Fusion, IPP's Wendelstein 7-X) twist the field with complex external coils instead, trading harder engineering for steadier operation. Both are magnet-and-cryogenics businesses. The breakthrough that created the private tokamak boom is high-temperature superconducting (HTS) tape, which allows much stronger fields in a smaller machine; CFS's SPARC uses 18 magnets of 20 tesla. These employers hire magnet engineers, cryogenic and vacuum specialists, structural analysts, and large numbers of winding and assembly technicians.

Inertial confinement compresses a fuel capsule so fast that it fuses before it can fly apart. The US National Ignition Facility at Lawrence Livermore proved the physics: on 7 April 2025 its lasers delivered 2.08 MJ to a target that released 8.6 MJ, a target gain of 4.13. A power plant would need to repeat that several times a second, so laser companies (Focused Energy, Marvel Fusion, Inertia Enterprises) hire laser physicists, optical engineers, target-manufacturing specialists, and high-repetition-rate systems engineers. Pulsed-power approaches such as Helion's and Zap Energy's hire power-electronics and capacitor-bank engineers instead of optical ones.

Where the money comes from

Private capital is concentrated in a few large rounds. CFS raised $1 billion in August 2026, bringing its total to about $4 billion, roughly 30% of all capital the fusion industry has raised. In Europe, Munich-based Proxima Fusion closed a €411 million round in July 2026 to build Alpha, its demonstration stellarator, matched by €400 million from the Bavarian state. Livermore-based Inertia Enterprises raised $450 million in February 2026 to commercialise the NIF approach.

Governments now fund fusion as industrial policy, not only as science. The UK has committed £2.5 billion from 2025/26 to 2029/30, almost all of it through UKAEA and its STEP prototype power plant at West Burton in Nottinghamshire. Germany's cabinet adopted a fusion action plan in October 2025 with more than €2 billion to 2029 and the stated aim of building the world's first fusion power plant on German soil. Japan's revised strategy of June 2025 moved its target for demonstrating fusion electricity to the 2030s.

ITER, the 33-nation experiment at Saint-Paul-lez-Durance in Provence, remains the largest single project and the clearest warning about schedules. Its 2024 baseline put the start of research operations at 2034 and deuterium-tritium operation at 2039, four years later than planned, at an extra cost of about €5 billion. Private companies promise far faster progress: 71% of the companies the FIA surveyed expect the first fusion plant to deliver commercial electricity in the 2030s. Those are the forecasts of the companies raising the money, and the spread between them and the public programmes is the single most important fact for anyone weighing a fusion career.

China builds on a state timetable

China does not appear in the private-funding league tables because its effort runs through state enterprises. In July 2025 the state launched China Fusion Energy Co. in Shanghai, led by the China National Nuclear Corporation, with 15 billion yuan (about $2.1 billion) of registered capital and a target of commercial fusion around 2050. In Hefei, the Institute of Plasma Physics of the Chinese Academy of Sciences (ASIPP) is assembling BEST, a compact superconducting tokamak designed to burn deuterium-tritium plasma, scheduled for completion by the end of 2027. Shanghai start-up Energy Singularity ran its first HTS tokamak, HH70, in June 2024 and has since built a 21.7-tesla magnet for its successor. The hiring is overwhelmingly domestic, with few routes in for foreign engineers, but BEST and SPARC are racing to the same milestone in the same year, and Energy Singularity builds on China's own supply chain for HTS tape and other fusion materials.

Roles along the value chain

Listings in fusion change fast because each machine moves from design to manufacturing to assembly in a few years. The nuclear fusion jobs on Rejobs come mainly from Commonwealth Fusion Systems, Thea Energy, and Helion, and their mix shows where the industry is: building.

Plasma physics and diagnostics

Physicists design plasma scenarios, model stability and turbulence, and build the diagnostics that measure what the plasma does. These remain the most academic roles: a PhD is the norm, and the work is split between simulation code and experimental campaigns on existing machines. At private companies the physics team is small. Of CFS's 136 openings in October 2026, two were in plasma physics, against 26 in manufacturing operations and 14 on SPARC assembly. Public laboratories such as IPP, CEA's IRFM at Cadarache, and the Princeton Plasma Physics Laboratory hire more physicists, often on fixed-term postdoctoral contracts, and most enter through research and development groups.

Magnets, cryogenics, and vacuum

This is the core of magnetic-confinement hiring. Magnet engineers design HTS cables and coils, analyse electromagnetic and mechanical stresses, and plan quench protection, the systems that keep a magnet from destroying itself if it loses superconductivity. A CFS posting for a mechanical engineer on cable magnets asks for five years of design and analysis experience with finite-element tools, and nothing specific to fusion. Cryogenic engineers keep magnets at liquid-helium or liquid-nitrogen temperatures; vacuum engineers build vessels and pumping systems held to ultra-high-vacuum standards. Suppliers flag these as bottlenecks: in the FIA's supply-chain survey, 32% of respondents named vacuum vessels and pumps and 44% heat management. Mechanical engineering and materials engineering backgrounds dominate.

Power, heating, and controls

Every fusion machine is a large electrical load that switches violently. Power electronics engineers design the converters that energise magnets and the pulsed-power banks that drive Helion- or Zap-style machines; power systems and components topped the supply-chain bottleneck list at 48%. Radio-frequency engineers build the microwave and ion-cyclotron systems that heat the plasma. Control engineering teams write the real-time feedback that keeps a plasma in place over milliseconds, and software development groups handle data acquisition, simulation pipelines, and machine-protection logic.

Fuel cycle, materials, and remote handling

A working power plant must breed its own tritium from lithium in a blanket around the plasma, recover it, and recycle it. Almost no one has done this at scale, so these teams combine chemical engineers, tritium specialists from the fission and heavy-water industries, and process-safety engineers. In the FIA survey, 48% of fusion companies flagged fuel-cycle systems as a future concern and 40% access to materials for extreme conditions. Kyoto Fusioneering and Canadian Nuclear Laboratories are building UNITY-2 at Chalk River, Ontario, designed to circulate up to 30 grams of tritium in a 24-hour cycle. Materials scientists study how walls erode under plasma and neutron bombardment; CFS's plasma-material interaction scientist role asks for experience at test facilities such as Magnum-PSI. Remote-handling engineers, a speciality UKAEA developed at its RACE centre in Culham, design the robots that will maintain components too radioactive for people to touch.

Manufacturing, assembly, and construction

This is where most current openings sit. Production technicians wind magnet coils, splice superconducting tape, and run fibre-optic sensors through them; CFS's production technician role asks for six years of electromechanical assembly and lists winding equipment and liquid nitrogen and helium handling as advantages. Assembly technicians build the machine itself, welders join vessels to vacuum standards, and quality assurance teams, including non-destructive testing leads, certify every joint. Manufacturing engineers turn one-off prototypes into processes that can be repeated for a fleet of power plants. Once plant sites move to construction, as CFS plans at its Fall Line Fusion Power Station in Chesterfield County, Virginia, and Type One Energy with the Tennessee Valley Authority at Bull Run, the demand shifts to civil, piping, and electrical construction trades.

Safety, licensing, and project delivery

Fusion is regulated more lightly than fission in both leading markets, and that has created its own specialism. Since 10 September 2024, UK fusion facilities have been exempt from nuclear site licensing and fall under the Health and Safety Executive and the environmental regulators. In the US, the Nuclear Regulatory Commission proposed in February 2026 to regulate fusion machines under its byproduct-material rules rather than reactor licensing. Companies need regulatory compliance specialists who can write the first licence applications of their kind, radiation-protection and health and safety staff, and systems engineering and project management professionals who can run a first-of-a-kind build against a hard date.

Supply chain and business functions

The rest of a fusion company looks like any heavily funded hardware firm. Supply chain management roles are unusually technical, because buyers must qualify suppliers for components nobody has made before; a CFS opening for a supply chain engineer specialising in molten salts is a fair example. Finance, legal, people, and IT teams grow with each funding round, and the public listings of General Fusion and the agreed TAE merger with Trump Media have added investor-relations and public-company accounting and finance work. Power-origination teams, which sell the future output of plants to utilities and data-centre operators, are new and small; CFS's includes a head of power origination.

Transitioning from adjacent industries

Fusion employers recruit from wherever the hardware already exists, and the evidence is in their own job adverts. CFS's lead assembly technician posting asks for seven years in a highly technical assembly role and names aerospace, semiconductor, and oil and gas as examples. Speakers at the FIA's policy conference described companies recruiting from aerospace, nuclear energy, and advanced manufacturing.

• Fission and nuclear engineering: radiation protection, nuclear-grade quality assurance, tritium handling, and licensing transfer almost directly; fission engineers also understand neutron shielding and activated-component handling, which no other industry teaches.
• Particle accelerators and big-science facilities: RF heating, ultra-high vacuum, cryogenics, and pulsed power are the daily work at CERN-type laboratories, and the people who run them are among the closest fits.
• MRI and superconducting magnet manufacturing: coil winding, quench protection, and cryostat design carry over to HTS magnet production with a change of conductor.
• Aerospace and defence: precision assembly, configuration control, and working to tight tolerances with full traceability.
• Semiconductors: cleanroom discipline, vacuum deposition, and process control map onto HTS tape production and plasma-facing component manufacture.
• Oil and gas: pressure systems, coded welding, pipe stress analysis, and large-project delivery for plant construction; offshore project managers know how to run a first-of-a-kind build on a fixed budget.

Software engineers with real-time or high-performance computing experience also move across easily; most companies do not expect fusion knowledge in their first year.

Salaries in the US, UK, Germany, France, and Switzerland

Private American companies pay the most, competing for the same engineers as the technology and aerospace industries around Boston and Seattle. European public laboratories pay on fixed public-sector scales with strong pensions and job security.

Annual gross pay unless stated. US figures are posted ranges in Commonwealth Fusion Systems job adverts in Devens, Massachusetts, in October 2026; technician rates exclude a 10% shift differential. UK figures are from 2026 UKAEA graduate-scheme and UK Fusion Energy (STEP) adverts; the allowance is non-pensionable. German figures are the federal public-sector scale (TVöD Bund) valid from 1 May 2026, which IPP applies, calculated as 12 monthly payments before the annual bonus; E13 is the usual grade for scientists, E11 for engineers, and E9b for technicians. French figures are the 2027 Michael Page guide for R&D engineers in the Paris region, about 10% lower in Provence, and a 2025 Diplomeo survey of engineering graduates. Swiss figures are EPFL's 2026 postdoc scale, including the 13th month. ITER pays its staff on its own grade scale in net salaries exempt from French income tax. Figures are in local currency and not converted, since exchange rates move.

Data specific to fusion is thin outside the US, where several states require salary ranges in job adverts. The gap between American private pay and European public pay is wide, but European public posts come with defined-benefit pensions (UKAEA offers a final-salary scheme) and far less risk of a company running out of money. Start-up packages often include equity that cannot be sold until the company lists or is acquired.

Working conditions

Fusion work is concentrated in a few clusters, and moving to one of them is usually part of the job. In the US: the Boston area (CFS in Devens), Everett and Malaga in Washington (Helion, Zap Energy), Knoxville and Oak Ridge in Tennessee, Livermore and southern California, and northern New Jersey (Thea Energy). In Europe: Oxfordshire (UKAEA at Culham, Tokamak Energy), West Burton in Nottinghamshire for STEP, Munich and Greifswald, Darmstadt, and the Aix-en-Provence area around ITER and CEA Cadarache. Japan's are Kyoto and Tokyo; China's are Hefei, Shanghai, and Chengdu.

The workplace depends on where a machine is in its life. Design and physics teams work in offices and laboratories, often hybrid; STEP adverts expect three days a week on site. Factory roles are shift work: CFS's production technicians on the second shift work 2pm to 10.30pm, lift up to about 23 kg, and work around strong magnets, cryogens, and fumes, while its assembly technicians work on platforms around 7.6 metres high and in confined spaces. As plants move to construction, the conditions become those of a large energy construction site.

Security and export control matter more than in most clean-energy sectors, because fusion overlaps with weapons physics, lasers, and advanced materials. CFS adverts state that roles require compliance with US export-control laws, which can limit what a non-US citizen may work on. UK Fusion Energy requires a baseline personnel security check and warns that security clearance may be needed later.

Start-up risk is real, and it is the main thing to check before accepting an offer. General Fusion, one of the oldest private fusion companies, cut about a quarter of its roughly 140 staff in May 2025 when it ran short of money, before listing on Nasdaq in 2026. First Light Fusion in Oxford abandoned its own power-plant plans in 2025 to license its technology instead. Choose employers by funding runway and machine schedule, not by promised grid dates: ask how many months of cash the company holds, which milestone the next funding round depends on, and what happens to your team if that milestone slips.

Key employers

Tokamaks and stellarators (magnetic confinement)

• Commonwealth Fusion Systems - US, Devens (Massachusetts); building SPARC, roughly 75-80% structurally complete in August 2026 and aiming for scientific breakeven in 2027, then the 400 MWe ARC plant in Virginia
• Tokamak Energy - UK, Milton Park (Oxfordshire); spherical tokamaks and HTS magnets, holds a £70 million magnet contract for STEP running to 2029
• Proxima Fusion - Germany, Munich; stellarator developer, building the Alpha demonstrator with net energy targeted for 2031
• Type One Energy - US, Knoxville (Tennessee); stellarator plant Infinity Two planned with TVA at Bull Run, filed an initial licence application in January 2026
• Thea Energy - US, Kearny (New Jersey); planar-coil stellarator, raised $100 million in May 2026 and plans its Eos machine around 2030
• Gauss Fusion - Germany; industry-led stellarator company, targets a demonstrator in the mid-2030s
• Energy Singularity - China, Shanghai; HTS tokamak HH70 running since 2024, successor HH170 in development

Inertial and pulsed approaches

• Helion - US, Everett and Malaga (Washington); pulsed magnetic fusion, building the Orion plant to supply Microsoft with 50 MW from 2028
• TAE Technologies - US, southern California; beam-driven field-reversed configuration, merging with Trump Media in a deal valued at about $6 billion
• Zap Energy - US, Everett (Washington); sheared-flow Z-pinch with no magnets, added a fission strategy in 2026
• General Fusion - Canada, Richmond (British Columbia); magnetised target fusion, listed on Nasdaq in July 2026
• Focused Energy - Germany and US, Darmstadt and Austin; laser fusion, raised $240 million in May 2026
• Marvel Fusion - Germany, Munich, with a laser facility at Colorado State University; laser-driven fusion plus industrial lasers
• Inertia Enterprises - US, Livermore (California); commercialising the NIF laser approach
• First Light Fusion - UK, Oxford; now licenses its amplifier technology rather than building its own plant

Components and fuel cycle

• Kyoto Fusioneering - Japan, with bases in the UK, US, and Germany; plant engineering, gyrotrons, and fuel-cycle systems, co-owner of UNITY-2 in Canada

Public laboratories and programmes

• ITER - France, Saint-Paul-lez-Durance; 33-nation tokamak, research operations from 2034
• Fusion for Energy - Spain, Barcelona; the EU agency that manages Europe's contribution to ITER
• UKAEA and UK Fusion Energy (STEP) - UK, Culham and West Burton; the national lab, its RACE remote-handling centre, and the STEP prototype plant (UK Industrial Fusion Solutions was renamed UK Fusion Energy in March 2026)
• Max Planck Institute for Plasma Physics - Germany, Garching and Greifswald; ASDEX Upgrade tokamak and Wendelstein 7-X stellarator
• CEA IRFM - France, Cadarache; operates the WEST tokamak beside the ITER site
• EUROfusion - EU-wide consortium funding the European research programme
• Princeton Plasma Physics Laboratory - US, New Jersey; national fusion laboratory and the NSTX-U spherical tokamak
• Lawrence Livermore National Laboratory - US, California; home of the National Ignition Facility
• Oak Ridge National Laboratory - US, Tennessee; fusion materials, fuel-cycle research, and the host of the US ITER project office
• ASIPP - China, Hefei; runs the EAST tokamak and is building BEST
• QST - Japan, Naka; operates the JT-60SA tokamak with the EU
• Korea Institute of Fusion Energy - South Korea, Daejeon; operates the KSTAR superconducting tokamak

Two other clean-energy sectors share much of fusion's engineering base: high-voltage conversion and grid connection link it to grid and utilities, and the power-electronics skills behind pulsed-power machines are also in demand in energy storage.

Outlook to 2030

The next four years will test the schedules on which today's hiring rests. CFS aims to show scientific breakeven on SPARC in 2027, the same year ASIPP plans to complete BEST in Hefei. Helion has promised Microsoft electricity from Orion in 2028, Thea Energy plans its Eos machine around 2030, and Proxima Fusion targets net energy from Alpha in 2031. If even two of those land close to plan, the industry moves from building one-off machines to building plants, and the demand shifts from magnet winders and physicists to construction trades, operators, and licensing staff. If they slip as ITER did, the $14.24 billion raised since 2021 will have to stretch further, and the companies with the longest runway will be the ones still hiring.