Probabilistic safety assessment (PSA) engineerSalary, qualifications, career path and hiring demand, 2026 edition
A probabilistic safety analysis engineer builds and maintains quantitative models of nuclear risk: initiating events, event trees, fault tree analysis, equipment reliability, human error, common-mode failures, internal and external events, severe-accident progression and uncertainty. The job turns nuclear power plant design and plant-specific data into risk insights such as core-damage frequency and release frequency, then uses those insights to challenge reactor technologies, support nuclear regulatory commission safety cases and inform risk-sensitive decisions throughout the nuclear lifecycle.
PSA engineer is not a separately coded national wage occupation, so the ladder below is a TRX 2026 market model anchored to live nuclear postings and the broader US nuclear-engineer series. Westinghouse is advertising entry PRA engineering at $58,400–$73,000 and senior PRA work at $85,200–$106,500; Rolls-Royce SMR is advertising £48,000–£63,000 for a PSA engineer, while UK specialist assessor roles are reaching about £80,000.
There is no universal PSA licence. The gate is evidence that you can build, quantify, review and defend a model under a recognised framework: ASME/ANS standards and NRC guidance in the US, or ONR SAPs and PSA TAGs in the UK. Employers then screen for software depth, plant-systems understanding, HRA/CCF judgement, hazard modelling, uncertainty treatment, model configuration control and, on sensitive programmes, security clearance.
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
- Probabilistic risk assessment engineer · PRA engineer · probabilistic safety analyst · nuclear risk analyst · PSA specialist · risk engineer
- Entry qualification
- Degree in nuclear, mechanical, electrical, chemical or systems engineering, physics or mathematics. Graduate entry exists; plant-systems knowledge and quantitative modelling quickly become the real filters.
- Typical entry pay
- $58,400–$75,000 (US PRA Engineer I) · £38,000–£48,000 (UK early-career PSA/safety analyst).
- Senior pay
- $120,000–$160,000 principal, toward $185,000 lead/manager · £62,000–£80,000 principal, toward £100,000 lead/manager.
- Contract day rates
- £500–£700 established; £650–£900 principal, peer-review, hazards or cleared work; about $70–$130/hr US specialist consulting.
- Professional gate
- No single licence. CEng/PE helps; model ownership, peer-review closure, regulator-facing delivery and competence against PSA standards decide the shortlist.
- Security
- UK BPSS common, SC/DV on sensitive programmes. US plant access varies; federal, DOE/NNSA and naval work may add citizenship or clearance requirements.
- Where the work sits
- Utilities, reactor vendors, SMR/advanced-reactor developers, consultancies, new build, operating-fleet safety teams, regulators, national laboratories and defence nuclear.
- Travel
- Low to moderate. Plant walkdowns, peer reviews, customer workshops, design reviews and regulator meetings create periodic site travel.
- TRX segments
- Large new build · New technology development · Operating fleet · Defence nuclear · Decommissioning · Government / national laboratories
Six versions of the same job title
PSA is one discipline, but the work changes materially with plant lifecycle, hazard class and how the model is being used. The title is broad; the modelling boundary, standard and decision being supported are not.
Operating LWR Level 1 / LERF PSA
Maintains the internal-events model for an operating PWR/BWR: initiating events, event and fault trees, success criteria, component data, HRA, CCF, quantification, cutsets and importance measures.
Advanced reactor / new-build design PSA
Develops PSA while the design is still moving, using risk insights to change system architecture, redundancy, diversity, operator actions and safety classification rather than merely documenting a finished plant.
Fire, seismic and external-hazards PRA
Extends the model beyond internal events into fire scenarios, seismic fragility, flooding, high winds and other hazards where spatial data, screening and specialist engineering interfaces dominate.
Level 2 / severe-accident PSA
Starts from core-damage states and models containment response, accident progression, source-term/release categories and large or early release frequencies.
Risk-informed operations and licensing
Uses a maintained model to support configuration risk, maintenance planning, technical-specification changes, in-service inspection/testing, plant modifications and other risk-informed applications.
Defence / naval and high-hazard facility PSA
Applies probabilistic reasoning to naval propulsion, defence nuclear or non-standard facilities where hazards, mission states, security constraints and authorised safety-case arrangements differ from civil power.
What the week actually looks like
A composite day for a senior PSA engineer supporting a reactor design or operating plant. Most of the work is model-based, but the engineer spends almost as much time testing assumptions against system design, operating procedures, human actions and other safety disciplines as they do running the software.
What probabilistic safety assessment engineers are paid in 2026
There is no official wage series for the exact PSA/PRA engineer title. The ladders below are a TRX Q3 2026 market model anchored to live Westinghouse and Rolls-Royce SMR postings, current UK specialist PSA recruitment and the broader BLS nuclear-engineer distribution. Permanent base pay is shown; bonus, clearance, travel and overtime are excluded.
How probabilistic safety assessment engineering compares to adjacent roles
US figures use the BLS nuclear-engineer series where an official occupation exists and TRX Q3 2026 market models for specialist nuclear titles that are not separately coded.
| Occupation | Median | P10 | P90 | What moves the number |
|---|---|---|---|---|
| Probabilistic safety assessment engineer (nuclear) | $110,000 | $58,000 | $185,000 | Model ownership, Level 2/3, hazards, peer review, regulator interface |
| Nuclear engineers (all specialties, BLS May 2025) | $133,970 | $92,960 | $196,290 | Industry, geography, seniority and technical specialism |
| Nuclear safety case engineer (TRX market model) | $125,000 | $80,000 | $175,000 | Safety-case authority, licensing, ALARP, programme criticality |
| Nuclear reliability / risk engineer (TRX market model) | $115,000 | $75,000 | $165,000 | Systems depth, reliability data, maintenance and risk applications |
Anchors include Westinghouse 2026 PRA Engineer I at $58,400–$73,000, Westinghouse senior PRA at $85,200–$106,500, Rolls-Royce SMR PSA engineering at £48,000–£63,000 and a UK nuclear probabilistic safety assessor market range of £60,000–£80,000. BLS nuclear engineers: median $133,970, P10 $92,960, P90 $196,290, May 2025.
Level 2/3, fire and seismic PRA
Many engineers can maintain an internal-events Level 1 model; fewer can own severe-accident progression, external hazards or integrated hazard results and defend the interfaces between them.
Peer-review and regulatory closure
Engineers who have taken an ASME/ANS peer review from preparation through findings closure, or defended PSA scope with ONR/NRC, remove schedule and licensing risk for the employer.
Advanced-reactor risk-informed design
FOAK developers need PSA practitioners who can work before the design is mature, manage uncertainty honestly and turn risk insights into architecture and licensing decisions rather than retrospective justification.
Three ways in, and only one of them starts with a nuclear degree
PSA has a graduate route, but the strongest mid-career hires combine modelling with plant systems, deterministic safety or reliability experience. Software is taught faster than modelling judgement.
Graduate engineer into PRA / PSA
Five to ten years to senior level.
Systems / reliability engineer into PSA
Five to twelve years.
Deterministic safety / fault studies into PSA
Six to twelve years.
Are you actually ready to compete for a PSA engineer role?
A credible PSA CV needs more than “fault trees” and a software name. The shortlist is looking for model scope owned, plant systems modelled, Level 1/2/3 depth, hazards covered, HRA/CCF work, peer-review or regulator exposure, risk-informed decisions influenced and evidence that your model changes survived independent technical review. If those outcomes are buried under generic safety-engineering language, the hiring team will assume you supported the model rather than owned it.
Free resume scoring on avua, TRX's job search and application platform. Your score is yours; it is not shared with employers.The usual gap is not mathematics; it is proof that you owned model logic, assumptions, quantification and the engineering decision that followed.
Illustrative figures based on TRX shortlisting patterns across nuclear safety, risk and PSA/PRA vacancies. Your own score is generated by avua from your CV and target role.
The credentials that actually gate the work
PSA engineering is gated by modelling competence, recognised standards and programme access rather than one statutory professional licence.
| Credential | Jurisdiction | Required for | Time | Notes |
|---|---|---|---|---|
| Engineering / physics / maths degree or equivalent | All | Most PSA roles | 3–4+ yrs | Several STEM routes accepted. |
| Hands-on PSA / PRA competence | All | Model ownership | 2–5 yrs | Event/fault trees, HRA/CCF, data and quantification. |
| RiskSpectrum / CAFTA / SAPHIRE | All | Production modelling | Months–years | Tool varies; logic is transferable. |
| ASME/ANS + NRC guidance | US | US PRA applications | Role-specific | RG 1.200; advanced-reactor guidance where relevant. |
| ONR SAPs + PSA TAGs | UK | UK safety cases / GDA | Role-specific | NS-TAST-GD-030 and 116 are core references. |
| HRA / CCF / uncertainty | All | Senior scope | 2–6 yrs | Weak assumptions can dominate results. |
| BPSS / SC / DV or site access | UK / US | Sensitive programmes | 2–20+ wk | Programme-specific access requirement. |
| CEng / PE | UK / US | Senior credibility | 4–8 yrs | Preferred, not universally required. |
US work commonly references ASME/ANS PRA standards and NRC guidance such as RG 1.200; UK dutyholders use ONR SAPs and TAGs including NS-TAST-GD-030 and 116. Clearance is programme-specific.
What appears on a 2026 PSA engineering shortlist
Recruiters screen for people who can own a defensible probabilistic model, not simply operate a modelling package.
Named on the specification
- Fault-tree and event-tree modelling — Initiating events, success criteria, dependencies, cutsets and traceable logic.
- HRA, CCF and reliability data — Human actions, dependency, common-cause failure and defensible component data.
- RiskSpectrum / CAFTA / SAPHIRE — Practical model development, quantification, database handling and configuration control.
- Internal and external hazards — Internal events plus credible fire, seismic, flooding or other hazard modelling.
- Uncertainty and risk metrics — CDF/LERF, importance measures, sensitivity cases and clear treatment of uncertainty.
- Standards and safety-case integration — Regulatory expectations, technical writing and connection to engineering decisions.
What decides between two shortlisted candidates
- Level 2 / Level 3 capability — Severe-accident progression, containment, release and consequence interfaces.
- Peer-review finding closure — Preparing for challenge, resolving findings and demonstrating model quality.
- Advanced-reactor risk-informed design — Applying PSA before design maturity and influencing architecture or licensing.
- Fire and seismic PRA — Specialist hazard capability combining risk methods with spatial, fire or fragility knowledge.
- Risk-informed applications — Configuration risk, technical specifications, maintenance, inspection/testing or plant changes.
- Regulator and multidisciplinary influence — Explaining probabilistic results without overstating numerical precision.
The 2026 demand map
Demand follows programmes where risk is shaping design, licensing, life extension or operating decisions: UK new build/SMRs, the US fleet and advanced reactors.
| Programme | Location | Phase in 2026 | Engineering demand |
|---|---|---|---|
| Rolls-Royce SMR | UK | GDA progressing; UK preferred SMR technology | Very high; live Level 1/2/3 PSA hiring. |
| Sizewell C | Suffolk, UK | Full construction after FID / financial close | High; EPR safety case and design-change risk support. |
| Hinkley Point C | Somerset, UK | Peak construction / reactor fit-out | High; safety-case maturation and commissioning interfaces. |
| Sizewell B | Suffolk, UK | Operating PWR; life extension to 2055 | High; model maintenance, PSR and plant-change analysis. |
| EDF UK fleet | UK | Operations / life extension / defuelling | Medium-high; operating and transition risk assessments. |
| Westinghouse / US fleet services | US | Fleet PRA upgrades and risk-informed applications | High; live 2026 entry and senior PRA hiring. |
| TerraPower Natrium | Wyoming, US | Construction since April 2026 | Very high; advanced-reactor PRA and licensing. |
| newcleo LFR-AS-200 | US / Europe | NRC pre-application; Level 1/2 PRA | Very high; live 2026 PRA recruitment. |
| X-energy Xe-100 | US / UK | Pre-application / 2026 regulatory engagement | High; HTGR risk-informed design and licensing. |
| Kairos Hermes | Oak Ridge, US | Advanced test reactor under construction | High; advanced-reactor safety and risk analysis. |
Programme phases move. This table reflects confirmed 2026 status and active PSA demand centres; it does not imply every organisation has a live vacancy today.
PSA is moving upstream.
Rolls-Royce SMR is recruiting across Level 1/2/3 while design progresses; newcleo is building an integrated Level 1/2 model during NRC engagement; Natrium is already in construction after its 2026 permit. The valuable engineer uses probabilistic insight early enough to change design, not merely quantify it afterwards.
People who can defend the chain from plant reality to risk result.
Fire/seismic plus systems depth, HRA plus operations credibility, Level 2 plus severe-accident physics, and advanced-reactor PSA plus licensing are hard combinations to hire. Software users are trainable; engineers who challenge assumptions, close peer-review findings and explain uncertainty to regulators are scarcer.
Adjacent and onward roles
PSA sits between nuclear safety, reliability, systems engineering and licensing. These are the closest technical siblings and progression routes.
Questions nuclear engineers ask when deciding whether PSA is the right safety specialism and whether their current experience will transfer
How much does a probabilistic safety assessment (PSA) engineer earn in 2026?
The exact title is not separately coded nationally. TRX models US pay from about $58,400–$75,000 at graduate/PRA Engineer I level through $120,000–$160,000 at principal level and about $145,000–$185,000 for lead/manager scope. In the UK, a current Rolls-Royce SMR PSA role is £48,000–£63,000, with experienced specialist assessor roles around £60,000–£80,000 and lead-level market pay modelled above that. These figures reflect demand for engineers skilled in complex probabilistic safety analysis and quantitative risk assessment.
Do you need a nuclear engineering degree or professional licence?
No single degree or licence is mandatory. Nuclear, mechanical, electrical, chemical and systems engineering, physics and mathematics are all credible entry backgrounds; Westinghouse's 2026 entry role accepts several engineering disciplines, while Rolls-Royce SMR asks for engineering, physics, maths or equivalent relevant experience. CEng/PE helps at senior level, but model ownership, technical guidance, and nuclear reactor design judgement matter more.
What is the difference between a PSA engineer and a nuclear safety case engineer?
A PSA engineer builds the probabilistic risk assessment (PRA) model: what can fail, how sequences combine, how likely they are and what risk metrics result. A safety case engineer owns a broader justification using deterministic safety assessment, engineering substantiation, PSA techniques, human factors and other evidence. PSA is one of the strongest quantitative inputs to the case, but it is not the whole case.
What do Level 1, Level 2 and Level 3 PSA mean?
Level 1 estimates accident sequences leading to core damage or an equivalent severe plant state. Level 2 starts from those sequences and evaluates containment/plant response, severe-accident progression and radioactive release; Level 3 takes release information into off-site consequence and public/environmental risk. Many jobs are Level 1/LERF-heavy, so genuine Level 2/3 experience is a differentiator.
Which software and methods are most valuable?
RiskSpectrum is prominent in UK and European hiring, while CAFTA and SAPHIRE are common US tools; the model package matters, but fault-tree and event-tree modelling, human reliability analysis (HRA), common-cause failure (CCF), reliability data, seismic events and external hazard modelling, and uncertainty treatment are the transferable core. Increasingly, SQL, Excel automation and scripting help because large PSA models are data-management problems as well as safety models.
Is PSA engineering in demand in 2026?
Yes, especially where programmes are simultaneously designing, licensing or extending nuclear assets. Rolls-Royce SMR has a live Level 1/2/3 PSA hiring, Sizewell C is in full construction after financial close, Sizewell B has a path to 2055, Natrium entered construction in April 2026 and newcleo is actively developing an integrated Level 1/2 PRA during NRC engagement. The tightest market is for senior people who can provide technical guidance, own model quality and regulatory challenge, not simply run quantification.
We only recruit in nuclear. That is the whole point.
TRX works across operating-fleet risk, new build, SMRs, advanced reactors, defence nuclear and safety-case programmes in 14+ countries. Send us your CV and we will tell you whether it reads as PSA ownership, adjacent safety/reliability experience or a credible route into probabilistic safety — and which specialism your experience fits.