Confined space entry supervisor (nuclear)Salary, qualifications, career path and hiring demand, 2026 edition
A confined space entry supervisor controls who goes into vessels, tanks, pits and cells, and makes sure they come back out. Testing the atmosphere before and during entry, controlling access, maintaining communication with people inside, and having a rescue plan that would actually work. On nuclear sites the space may also be contaminated, which changes everything about the entry.
Confined space entry supervisors on nuclear sites earn a median of around $98,000 in the United States and roughly £48,000–£62,000 when qualified in the UK, rising to £86,000 at senior level. Rescue-capable supervisors who have undergone specialized training and can lead rescue services sit at the top of the range.
Confined space supervision qualification plus gas testing competence and rescue training are essential. Nuclear sites add radiological training, clearance, and understanding of osha regulations for confined space entry permit and safe working environment compliance.
The role at a glance
Everything an employer will ask about in the first fifteen minutes of a screening call.
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- Also called
- Entry supervisor · confined space controller · top man · entry controller · confined space safety supervisor
- Entry qualification
- Confined space supervision qualification plus gas testing and rescue training. Trade or safety background is typical. No degree required.
- Typical entry pay
- $70,000–$83,000 (US) · £30,000–£39,000 (UK entry)
- Senior pay
- $128,000–$146,000 (US) · £68,000–£86,000 (UK senior supervisor)
- Contract day rates
- £320–£450 for nuclear confined space supervision; £400–£560 for outage, decommissioning campaign and rescue-capable work; $65–$118/hr on US contract support
- Professional gate
- Confined space supervision and gas testing certification, with rescue competence required where the supervisor is part of the rescue arrangement.
- Security
- UK BPSS minimum, SC common. US: unescorted access authorisation under 10 CFR 73.
- Where the work sits
- Decommissioning contractors, outage service companies, operating utilities and specialist safety providers. Site-based, campaign-driven.
- Travel
- Moderate to high. Confined space supervisors follow outages and decommissioning campaigns.
- TRX segments
- Decommissioning & dismantling · Operating fleet · Fuel handling & fuel cycle · Large new build · Radioactive waste management · Fusion
Six versions of the same job title
"Confined space entry supervisor" changes with the space: an outage vessel entry, a contaminated cell on a decommissioning site, or tanks at a fuel-cycle plant. Note decommissioning leads, explained below. Meter = relative hiring volume across TRX's 2026 desk activity.
Decommissioning & dismantling
Controlling entries on decommissioning sites: contaminated cells, redundant vessels and legacy structures, where atmosphere and contamination are both uncertain. Sellafield, Magnox fleet, Dounreay.
Operating fleet
Outage confined space work: vessel and tank entries for inspection and maintenance, compressed into the outage window and often in radiological areas. US fleet, EDF UK fleet.
Fuel handling & fuel cycle
Entries at fuel-cycle facilities, where chemical atmospheres, process residues and contamination combine and the atmosphere hazard may be more significant than the radiological one. Sellafield, Urenco.
Large new build
Confined space control during construction and commissioning: tanks, vessels and voids being worked on before systems are in service. Hinkley Point C, Sizewell C.
Radioactive waste management
Entries at waste facilities, including vaults, silos and storage structures.
Fusion
Confined space control for fusion vessel access during maintenance and assembly campaigns. ITER, UKAEA.
What the week actually looks like
A composite day for a confined space entry supervisor on a nuclear site. Physically undemanding but requiring sustained attention. Campaigns and outages set the pace (noted below).
What confined space entry supervisors are paid in 2026
Bars show the 25th to 90th percentile of base salary. The marker is the median. Switch currency to move between the US and UK markets, which behave differently. Much of this work is contract and campaign based; day rates are given above. Source: TRX market analysis, Q3 2026.
How confined space supervision compares
US national medians, annualised from BLS May 2025 hourly data at 2,080 hours. The OHS specialist median is BLS OEWS May 2025; the specialism ranges are TRX market analysis.
| Occupation | Median | P10 | P90 | What moves the number |
|---|---|---|---|---|
| Confined space entry supervisor (nuclear) | $98,000 | $70,000 | $146,000 | Rescue capability, contaminated entries, campaign availability, clearance |
| Occupational health and safety specialists (BLS) | $81,140 | $52,000 | $130,000+ | The nuclear premium reflects contaminated entry work and clearance |
| Conventional safety HSE advisor (nuclear) | $102,000 | $70,000 | $158,000 | The broader conventional safety discipline |
| Site emergency response technician | $96,000 | $68,000 | $144,000 | The emergency response role alongside |
Sources: US BLS OEWS May 2025 for the coded occupations; TRX market analysis Q3 2026 for the specialism ranges. This is a specialist safety supervision role rather than a general HSE post, which is why it sits close to but below the broader advisor role.
Rescue capability
Supervisors qualified and equipped to lead a rescue, rather than relying on an external team, command a clear premium.
Contaminated entries
Spaces that are both confined and radiologically contaminated require combined competence that few supervisors hold.
Campaign availability with clearance
Decommissioning campaigns need supervisors continuously, and cleared people can start immediately.
Three ways in, and only one of them starts with a nuclear degree
This role is entered from trade or safety backgrounds and qualified relatively quickly, making it one of the faster specialist safety routes onto a nuclear site.
From the trades, United Kingdom
One to three years to qualified.
From safety
One to three years.
Career changer
Six to eighteen months, one of the faster safety entries.
Are you actually ready to compete for an entry supervision role?
Everything above tells you what the market pays and what it asks for. It does not tell you how your record reads against the other supervisors chasing the same campaign, and in a market where rescue capability and clearance decide who starts, 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 safety CV can still miss out if it does not show rescue capability or contaminated entry experience. The gap is the part you can fix.
Illustrative figures based on TRX shortlisting patterns across safety supervision vacancies. Your own score is generated by avua from your CV and the role you are targeting.
The credentials that actually gate the work
Gated by confined space and gas testing certification, with rescue competence the main differentiator.
| Credential | Jurisdiction | Required for | Time | Notes |
|---|---|---|---|---|
| Confined space supervision qualification | All | The role | Weeks | Progressive certification levels by space classification. |
| Gas testing competence | All | Atmosphere testing | Days–weeks | A distinct and essential qualification. |
| Rescue training | All | Rescue arrangements | Weeks | Required where the supervisor forms part of the rescue plan. |
| Breathing apparatus competence | All | High-risk entries | Weeks | Maintained through regular assessment. |
| Radiological training | All | Contaminated entries | Days–weeks | Required for most nuclear confined space work. |
| Unescorted access authorisation | United States | Site work | 4–10 wk | 10 CFR 73 background check. |
| CCNSG or safety passport | UK | Site access | Days | Standard for UK site work. |
| BPSS / SC clearance | UK | Site access | 2–20 wk | Often the main lead time before starting. |
Confined space certifications are portable between sites, which makes this role more mobile than most plant-qualified positions.
What appears on a 2026 confined space shortlist
Drawn from nuclear confined space specifications TRX has worked in the last twelve months, ordered by how often each is a hard filter.
Named on the specification
- Entry control — Managing who is in a space and for how long
- Atmosphere testing — Pre-entry and continuous monitoring
- Rescue arrangements — Ensuring a workable plan exists before entry
- Permit systems — Working within the site's entry permit regime
- Communication — Maintaining contact with people inside
- Hazard identification — Recognising what a space contains before entry
What decides between two shortlisted candidates
- Rescue capability — Able to lead a rescue rather than call for one
- Contaminated entry experience — Combined radiological and confined space work
- Decommissioning entries — Unknown conditions in legacy structures
- Breathing apparatus competence — For the highest-risk entries
- Existing clearance — Starting now rather than in two months
- Authority — The willingness to stop an entry against pressure
The 2026 demand map
Demand is driven by decommissioning and outages, both of which generate large volumes of confined space entries.
| Programme | Location | Phase in 2026 | Engineering demand |
|---|---|---|---|
| Sellafield & NDA estate | Cumbria, UK | Decommissioning | Very high; cells and vessels never designed for entry |
| US operating fleet | Nationwide | Outages | Very high; concentrated vessel and tank entry work |
| Magnox and Dounreay | UK | Decommissioning | Sustained campaign demand |
| EDF UK fleet | UK | Outages | Seasonal entry supervision demand |
| Outage contractors | Global | Seasonal peaks | The main route for contract supervisors |
| Fuel-cycle facilities | Global | Operations | Chemical and contaminated atmospheres |
| Hinkley Point C | Somerset, UK | Construction and commissioning | Tank and vessel work |
| Waste facilities | UK & global | Operations | Vault and silo entries |
| Specialist safety providers | Global | Cross-programme | Supplying entry supervision to sites |
| ITER / fusion | France & UK | Assembly and maintenance | Vessel access campaigns |
Outage schedules are published ahead, making entry supervision demand seasonal and predictable. TRX tracks the outage calendar.
Decommissioning entries are the hardest work there is
An outage vessel entry is into a space with known contents and a known history. A decommissioning cell entry may be into a structure nobody has been inside for decades, with residues nobody has characterised, contamination that has not been surveyed and an atmosphere that could be anything. That combination makes decommissioning the most demanding confined space environment in the industry and the largest source of demand for supervisors who can handle it.
Combined competence is the constraint
Confined space supervisors are recruitable from general industry. Supervisors who also hold rescue capability and understand radiological working are a much smaller group, and decommissioning entries require all three. As the NDA estate accelerates, contractors report that entry supervision with combined competence is a genuine constraint on how many entries can be run at once.
Adjacent and onward roles
Confined space supervision sits within site safety and connects to rescue and HSE roles. These are the moves TRX sees most often.
Questions we get asked every week
How much does a confined space entry supervisor earn in 2026?
In the United States the market runs from about $70,000 as a trainee to $98,000 at the median, with lead supervisors past $146,000. In the UK, qualified supervisors earn £48,000–£62,000, rising to £86,000 at senior level. Contract supervisors bill £320–£450 a day, and £400–£560 for outage, decommissioning and rescue-capable work. These figures reflect the specialized nature of confined space entry supervisor nuclear vacancy roles, where safety compliance and permit space entry operations are critical.
What qualifications do you need for nuclear confined space supervision?
Confined space supervision qualification at the appropriate level, gas testing competence for atmosphere monitoring, and rescue training where you form part of the rescue arrangement are essential. Nuclear sites add radiological training and security clearance. Proper training in safety procedures, atmospheric testing, and rescue procedures ensures safety measures are effectively implemented during permit required confined spaces entry operations.
Can you become a confined space entry supervisor without nuclear experience?
Yes. Entry supervisors from petrochemical, water treatment, offshore and construction transfer directly, and fire service or rescue backgrounds are particularly valued. The nuclear-specific addition is radiological competence, since many entries are into contaminated spaces where the confined space and radiological hazards have to be managed together. This includes understanding permit space entry operation safety practices and ensuring continuous communication and safety equipment are in place.
Is nuclear confined space supervision a good career in 2026?
Demand is strong and growing, particularly across the decommissioning estate where entries into legacy structures are constant, and qualification is faster than most specialist routes. The honest caveat: it is campaign-driven with travel and periods between contracts, and the role carries real responsibility for people's lives with the pressure that brings. Safety compliance and preventing unauthorized entry are key duties.
What is the difference between an entry supervisor and an HSE advisor?
A conventional safety HSE advisor covers site safety broadly: risk assessments, inspections, incident investigation and safety management across all activities. A confined space entry supervisor holds a specific operational responsibility for individual entries: testing the atmosphere, controlling access, monitoring conditions and maintaining the rescue arrangement. Put simply, one advises on safety across the site and the other controls a particular high-risk activity in real time. The entry supervisor's authority is immediate and specific, and includes stopping an entry on their own judgement to ensure safe entry and acceptable entry conditions.
What decides who gets nuclear confined space work in 2026?
Rescue capability decides the best-paid work, because supervisors who can lead a rescue rather than wait for one are worth considerably more. Existing clearance comes next, since campaigns need people who can start now. Confined space certification, gas testing competence and contaminated entry experience are the near-universal filters. Employers also look for thorough training in safety measures, communication systems, and rescue procedures to protect employees and ensure safety compliance during entry operations.
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.