Nuclear fitterSalary, day rates, contract work and hiring demand, 2026 edition
A nuclear fitter does the mechanical trade work on nuclear sites: stripping and rebuilding pumps and valves, replacing seals and bearings, installing plant and dismantling it again. It is the same craft as mechanical maintenance, but the term usually describes the contract and outage market, where fitters move between stations and campaigns rather than holding a permanent post at one.
Nuclear fitters earn a median of around $96,000 in the United States and roughly £42,000–£55,000 once qualified in the UK as staff, rising to £78,000 at senior level. Contract fitters bill £300–£440 a day, and £380–£540 for outage, campaign and specialist work.
A mechanical apprenticeship or time-served trade, plus site induction and qualification, security clearance and the medical requirements for plant work.
The role at a glance
Everything an employer will ask about in the first fifteen minutes of a screening call. Note this describes the trade and contract market; the permanent staff equivalent is covered separately.
- Also called
- Mechanical fitter · maintenance fitter · plant fitter · pipefitter (where pipework is the focus) · outage fitter
- Entry qualification
- Mechanical apprenticeship or time-served trade. No degree, and fitters from other heavy industries convert directly.
- Typical entry pay
- $68,000–$82,000 (US) · £24,000–£32,000 (UK apprentice), £42,000+ once qualified
- Senior pay
- $128,000–$148,000 (US) · £62,000–£78,000 (UK senior fitter)
- Contract day rates
- £300–£440 for nuclear fitting; £380–£540 for outage, decommissioning campaign and specialist work; $58–$105/hr on US contract fitting
- Professional gate
- No licence. Trade qualification plus site induction and task qualification, which for contract fitters is repeated at each new site.
- Security
- UK BPSS minimum, SC for some sites. US: unescorted access authorisation under 10 CFR 73.
- Where the work sits
- Outage and maintenance contractors, decommissioning contractors, and directly for licensees. Site-based, campaign-driven.
- Travel
- High for contract work. Fitters follow outages and campaigns between sites, and living away is normal.
- TRX segments
- Operating fleet · Decommissioning & dismantling · Large new build · Fuel handling & fuel cycle · Radioactive waste management · Fusion
Six versions of the same job title
"Nuclear fitter" changes with the campaign: an outage at an operating station, a dismantling programme, or an installation contract on a new build. Note that unlike most roles here, decommissioning runs close to the fleet, because dismantling is fitting work. Bar shows relative hiring volume across TRX's 2026 desk activity.
Operating fleet
Outage and maintenance fitting at operating stations: pump and valve overhauls, seal and bearing replacement, pipework, and the large volume of mechanical work compressed into outage windows. US fleet, EDF UK fleet.
Decommissioning & dismantling
Dismantling work on decommissioning sites, which is fitting in reverse: cutting, breaking down and removing plant, frequently in contaminated conditions and protective equipment. Sellafield, Magnox fleet, Dounreay.
Large new build
Mechanical installation at new build sites: placing and connecting equipment, pipework installation and the preparation work before commissioning. Hinkley Point C, Sizewell C.
Fuel handling & fuel cycle
Fitting work at fuel-cycle plants, covering process equipment maintenance and modification in areas with continuous contamination risk. Sellafield, Urenco.
Radioactive waste management
Fitting work at waste facilities, supporting processing plant, handling equipment and packaging machinery.
Fusion
Mechanical fitting for fusion assembly and maintenance, including precision installation of components. ITER, UKAEA.
What the shift actually looks like
A composite day for a nuclear fitter during an outage or campaign, which is when most of this work happens. Long shifts, high tempo, defined end date — noted below.
What nuclear fitters are paid in 2026
Bars show the 25th to 90th percentile of base salary for staff positions. The vertical marker is the median. Switch currency to move between the US and UK markets. Note that a substantial proportion of fitters work contract, where day rates rather than salary apply; those are given above.
How nuclear fitting compares
US national medians. The industrial machinery mechanic median is BLS OEWS May 2025; the specialism ranges are TRX market analysis.
| Occupation | Median | P10 | P90 | What moves the number |
|---|---|---|---|---|
| Nuclear fitter | $96,000 | $68,000 | $148,000 | Campaign availability, specialism, contract vs staff, clearance |
| Industrial machinery mechanics (all industries) | $62,690 | $42,000 | $95,000+ | The nuclear premium is wide even for contract trade work |
| Mechanical maintenance technician (nuclear) | $102,000 | $72,000 | $155,000 | The permanent staff equivalent with full site qualification |
| Nuclear technician (umbrella) | $98,000 | $68,000 | $152,000 | The technician umbrella across all specialisms |
Sources: US BLS OEWS May 2025 for the coded occupations; TRX market analysis Q3 2026 for the specialism ranges. Staff figures sit slightly below the permanent mechanical maintenance technician role, which carries full site qualification and a stable post; contract fitters trade that security for day rates and flexibility.
Specialist equipment work
Valve, pump and turbine specialists command the highest day rates during outages.
Decommissioning campaigns
Dismantling in contaminated conditions and protective equipment pays above conventional fitting.
Reputation and availability
In a market that runs on word of mouth, fitters known to deliver are called first and negotiate better rates.
Three ways in, and one of them is open to everyone
This is among the most accessible skilled routes into nuclear. A mechanical trade plus site induction is genuinely enough to start, and the contract market means work can be found without committing to one employer.
Apprenticeship, United Kingdom
Four to six years to qualified.
Time-served conversion
Weeks to months, the fastest entry in this family.
Career changer
Six to eighteen months if you need the trade first.
Are you actually ready to compete for nuclear fitting work?
Everything above tells you what the market pays and what it asks for. It does not tell you how your CV reads against the other fitters chasing the same campaign, and in a market that runs on reputation and availability, that is the part that costs candidates the work.
Free resume scoring on avua, TRX's job search and application platform. Your score is yours — it is not shared with employers.A strong trade CV can still miss out if it does not show nuclear site experience or specialist equipment work. The gap is the part you can fix.
Illustrative figures based on TRX shortlisting patterns across fitting vacancies. Your own score is generated by avua from your CV and the role you are targeting.
The credentials that actually let you work on site
Gated by trade qualification and site access, with clearance usually the main lead time for contract work.
| Credential | Jurisdiction | Required for | Time | Notes |
|---|---|---|---|---|
| Mechanical trade qualification | All | Everything | 3–4 yrs | Apprenticeship or time-served equivalent. |
| Site induction and task qualification | All | Working on site | Days–months | Repeated at each new site for contract fitters. |
| Unescorted access authorisation | United States | Plant work | 4–10 wk | 10 CFR 73 background check; the main US lead time. |
| Radiological training | All | Controlled area work | Days–weeks | Required for most nuclear fitting work. |
| Medical fitness | All | PPE and plant work | Ongoing | Including respiratory protection where required. |
| CCNSG or equivalent safety passport | UK | Site access | Days | Standard for UK site work. |
| Specialist credentials | All | Better-paid work | Varies | Valve, rigging, confined space and similar. |
| BPSS / SC clearance | UK | Site access | 2–20 wk | The main UK lead time; worth obtaining early. |
For contract fitters, clearance and induction are repeated overheads. Confirm what a site requires and how long it takes before committing to a campaign.
What appears on a 2026 fitting shortlist
Drawn from nuclear fitting specifications TRX has worked in the last twelve months. Ordered by how often a hiring manager treats it as a hard filter rather than a nice-to-have.
Named on the specification
- Mechanical fitting — Stripping, overhauling and rebuilding plant
- Hand and power tools — Competent, safe practical work
- Precision work — Alignment, clearances and tolerances
- Drawings and manuals — Working from technical documentation
- Permits and isolations — Working safely on plant
- Trade qualification — Apprenticeship or time-served
What decides between two shortlisted candidates
- Valve and pump specialism — The most common and most valuable expertise
- Nuclear site experience — Knowing how these sites work saves induction time
- Decommissioning and PPE work — Comfortable and effective in protective equipment
- Existing clearance — Cleared fitters can start immediately, which matters on campaigns
- Reliability and reputation — The outage market runs on word of mouth
- Willingness to travel — Following campaigns is where the rates are
The 2026 demand map
Demand is campaign-driven, following outage schedules and decommissioning programmes. Highly mobile work with a large contract market.
| Programme | Location | Phase in 2026 | Engineering demand |
|---|---|---|---|
| US operating fleet | Nationwide | Refuelling outages | Very high; large seasonal outage craft demand |
| Sellafield & NDA estate | Cumbria, UK | Decommissioning | Very high; dismantling is fitting work at scale |
| EDF UK fleet | UK | Outages and life extension | High; larger outage scopes as plant ages |
| Hinkley Point C | Somerset, UK | Mechanical installation | Very high; large installation programme |
| Outage contractors | Global | Seasonal peaks | The main employer route for contract fitters |
| Magnox and Dounreay | UK | Decommissioning | Sustained campaign work |
| Sizewell C | Suffolk, UK | Construction | Growing installation demand |
| Fuel-cycle facilities | Global | Operations | Process plant maintenance |
| Waste facilities | UK & global | Operations | Plant maintenance and modification |
| ITER / fusion | France & UK | Assembly | Precision mechanical installation |
Outage schedules are published years ahead, which makes campaign work unusually predictable. TRX tracks the outage calendar and campaign hiring cycles.
Decommissioning is as large as the outage market now
Nuclear fitting has traditionally followed outages, but dismantling is fitting work too, and the NDA estate generates continuous campaign demand that does not depend on a refuelling calendar. For fitters, that means two substantial markets rather than one, and decommissioning work is often longer and more stable than outage campaigns, though it involves more time in protective equipment.
The trade that everything else waits for
Mechanical fitting is the largest craft requirement in nuclear and the most acutely short. Apprenticeship numbers fell for years, the existing population is ageing, and outages, decommissioning and new build now compete for the same fitters at the same time. Rates have risen accordingly, and contractors report that campaign start dates are increasingly set by craft availability rather than plant schedules.
Adjacent and onward roles
Fitting leads to specialism, supervision or permanent staff positions. These are the moves TRX sees most often.
Questions we get asked every week
How much does a nuclear fitter earn in 2026?
As staff, fitters earn from about $68,000 as an apprentice to $96,000 at the median in the US, and £42,000–£55,000 once qualified in the UK, rising to £78,000 at senior level.
Contract fitters bill £300–£440 a day, and £380–£540 for outage, decommissioning campaign and specialist work. A substantial proportion of the market works contract by choice.
Do you need qualifications to be a nuclear fitter?
Yes, a mechanical trade. An apprenticeship or time-served equivalent is the foundation.
On top you need site induction, radiological training, a safety passport in the UK, and security clearance, which is usually the main lead time before you can start.
Can you become a nuclear fitter without nuclear experience?
Yes, and it is among the fastest entries into the industry. Time-served fitters from manufacturing, offshore, marine, refining and construction convert directly, often within weeks once clearance is in place.
Nuclear does not require prior nuclear work, though existing clearance is a genuine advantage because it lets you start immediately when a campaign needs people.
Is nuclear fitting a good career in 2026?
Demand is exceptional, with outages, decommissioning and new build competing for the same fitters, and rates have risen accordingly. The contract market offers good money and variety for those who want it.
The honest caveat: the work is physical, often in protective equipment, involves long shifts and living away, and contract work is campaign-driven, so the pattern is intense periods followed by finding the next job.
What is the difference between a nuclear fitter and a mechanical maintenance technician?
The craft is the same. The difference is usually employment: a mechanical maintenance technician is typically permanent station staff, fully site-qualified, working a maintenance programme at one plant. A nuclear fitter more often works contract or campaign, moving between outages, decommissioning programmes and installation contracts.
Put simply, one holds a post and the other follows the work. Many people do both across a career, and the distinction is about the market rather than the skills, though permanent technicians accumulate deeper plant-specific qualification.
What decides who gets nuclear fitting work in 2026?
Reputation and availability lead, because the campaign market runs on word of mouth and contractors call people they know will turn up and deliver. Existing clearance matters enormously, since it lets you start now rather than in two months.
Trade qualification, specialist equipment experience and willingness to travel are the near-universal filters.
We only recruit in nuclear. That is the whole point.
TRX works across large new build, fusion, new technology development, decommissioning, radioactive waste management and nuclear medicine, in 14+ countries. Send us your CV and we will tell you honestly which path your experience actually fits, and what it is worth.