Designed for process safety engineers, HSE managers, plant operators with safety responsibility, and contractors working on COMAH and high-hazard sites who need a defensible, employer-recognised process safety qualification.
The NEBOSH HSE Certificate in Process Safety Management — also known as the NEBOSH PSM Certificate — is the UK benchmark process safety qualification, co-developed with the Health and Safety Executive (HSE). It is held by process safety engineers, HSE managers and contractors working on COMAH and upper-tier sites across oil & gas, petrochemicals, chemicals, pharmaceuticals, refining, nuclear and water treatment.
The qualification is delivered as a single unit — PSM1 — covering eight elements from process safety leadership and hazard identification through to incident investigation and lessons learned from major-accident case studies including Buncefield, Texas City and Piper Alpha. The syllabus aligns to the HSE Process Safety Leadership Principles and the Energy Institute PSM Framework.
NEBOSH Process Safety Management training has become the recognised entry point for COMAH duty-holders and Tier-1 contractors moving into specialist process safety roles. KeyOstas delivers the qualification as bespoke in-company training only — we do not run open-cohort dates. Fee quotes are built around delegate numbers, your COMAH facility and the sector-specific scenarios your team needs covered, so get in touch for a tailored estimate.
QUICK ANSWER
The NEBOSH HSE Certificate in Process Safety Management is for delegates working in high-hazard industries (oil & gas, petrochemicals, chemicals, pharmaceuticals, refining, nuclear and water) who need to identify, assess and manage major-accident hazards. It is not the right starting point for someone new to health & safety.
YOUR PATHWAY
The NEBOSH HSE Certificate in Process Safety Management is the natural specialism for delegates already holding the General Certificate who are moving into a process safety, COMAH or high-hazard role. Here is how the NEBOSH ladder fits together.
By the end of the NEBOSH HSE Certificate in Process Safety Management you will have the technical depth and the practical confidence to lead process safety on a high-hazard site — from a single-stream COMAH operator to a Tier-1 EPC contractor.
HAZARD IDENTIFY & CONTROL
Apply HAZOP, HAZID and FMEA techniques to identify major-accident hazards on process plants and produce a defensible safety case for COMAH duty-holders.
Recognise process hazards from flammable atmospheres, runaway reactions, hot work and energy isolation — and prescribe a layered control strategy aligned to ALARP.
Match independent protection layers, safety instrumented systems (SIS) and SIL-rated controls to the major-accident risk profile of your plant under IEC 61511.
LEAD & COMPLY
Apply the HSE Process Safety Leadership Principles to drive board-level accountability, leading indicators and process safety KPIs across operations.
Run a credible Management of Change process, asset integrity programme (RBI, ageing plant) and pre-startup safety reviews aligned to the Energy Institute PSM Framework.
Demonstrate compliance with COMAH duties, Safety Reports, MAPP and ALARP justification — and confidently support an HSE intervention or competent authority audit.
PSM1 SYLLABUS
PSM1 is a single unit with eight syllabus elements, co-developed with the UK Health and Safety Executive (HSE). The syllabus aligns to the HSE Process Safety Leadership Principles and the Energy Institute PSM Framework, and uses real major-accident case studies including Buncefield, Texas City and Piper Alpha.
CHOOSING YOUR NEBOSH
The NEBOSH HSE Certificate in Process Safety Management is a focused specialist add-on for high-hazard industries. Most delegates take it after the General Certificate, or alongside Diploma study, when they move into a process safety or COMAH-facing role.
YOU ARE HERE
Best for: Process safety engineers, HSE managers and contractors on COMAH / high-hazard sites
Level: Specialist (vocational); not formally RQF rated
Format: In-company at your site (KeyOstas)
Duration: Minimum 28 taught hours + ~20 hrs private study (typically 4-day intensive)
Assessment: PSM1 single open-book exam (2 hrs)
Sectors: Oil & gas, petrochemicals, chemicals, pharma, refining, nuclear, water
GENERAL H&S
Best for: H&S advisers, line managers and anyone moving into H&S
Level: RQF Level 3
Format: Classroom, virtual or in-company
Duration: ~120 hrs total (10–14 days face-to-face)
Assessment: GNC1 open-book + GNC2 workplace risk assessment
Sectors: All UK industries
SENIOR PRACTITIONER
Best for: Senior H&S practitioners and aspiring CMIOSH
Level: RQF Level 6 (degree-equivalent)
Format: Classroom, virtual or distance learning
Duration: ~470 hrs total (~12 months)
Assessment: 3 written units + workplace research project
Sectors: All UK industries — strategic H&S leadership
CAREER OUTCOMES & UK SALARIES
The NEBOSH HSE Certificate in Process Safety Management opens specialist roles across UK high-hazard industries — oil & gas, petrochemicals, chemicals, pharma, refining, nuclear and water treatment. Many delegates take it after the General Certificate as the recognised process safety specialism for COMAH-facing roles.
Typical job titles
UK earning potential
Indicative UK ranges. Senior major-hazards roles in oil & gas regularly exceed £100k base; contract day rates £550–£800/day.
Salary indicators based on Reed.co.uk, Indeed UK and the Energy Institute salary survey, April 2026. Top-hiring sectors: refining (Stanlow, Lindsey, Pembroke, Fawley, Humber), petrochemicals (Teesside, Grangemouth, Wilton), pharmaceuticals (GSK, AstraZeneca, Pfizer UK), specialty chemicals (INEOS, Synthomer, Croda), distilleries, nuclear (Sellafield, EDF) and Tier-1 EPC contractors.
ASSESSMENT
PSM1 is the single unit of the qualification, assessed by one open-book question paper set and marked by NEBOSH. The exam uses scenario-based questions drawn from real major-accident incidents, so delegates apply what they have learned to plant-realistic situations.
Format: One scenario-based question paper, set and marked by NEBOSH
Duration: 2 hours (open-book)
Pass mark: Set by NEBOSH each sitting
Sittings: NEBOSH-set sittings 4× a year (Feb / May / Aug / Nov)
Results: Typically returned within 50 working days
Resits: Resit PSM1 only at the next NEBOSH-set sitting (no need to re-attend the course)
Every KeyOstas PSM tutor is a working process safety practitioner with real COMAH, HAZOP and major-accident experience to bring to the room — not a career trainer.
Structured pre-exam coaching to get your delegates ready for the open-book PSM1 paper — drawing on real major-accident scenarios from your sector.
KeyOstas brings the NEBOSH PSM Certificate to your COMAH or upper-tier site, scheduled around shift patterns and turnaround windows.
Post-exam support that keeps delegates progressing — not just a certificate handed over and forgotten.
THE NUMBERS
1
Co-developed with HSEThe only NEBOSH process safety qualification built directly with the UK Health and Safety Executive — the regulator that investigates major-accident hazards.
6/6
UK refineries trainedDelegates from every major UK refining cluster — Stanlow, Lindsey, Pembroke, Fawley, Humber and Phillips 66 — have completed NEBOSH PSM training.
#1
UK process safety certificateThe benchmark process safety qualification for COMAH duty-holders, recognised across oil & gas, chemicals, pharma, refining and nuclear sectors.
The NEBOSH HSE Certificate in Process Safety Management was exactly what our team needed. Delivered on-site by KeyOstas, the course worked through Buncefield and Texas City in real depth and gave our process engineers a framework they could actually apply to our PHA reviews and bow-tie analyses. All four of our delegates passed first time, and our COMAH safety report has tightened up as a direct result.
Mark Webster
Process Safety Lead, Northgate Petrochemicals Ltd, Humberside
WHY KEYOSTAS
01
Top-tier accreditation status with NEBOSH — the recognised mark for centres meeting the highest delivery and learner-outcome standards.
02
One of NEBOSH's longest-standing accredited centres — centre number 009, trading and training since 1984.
03
Our PSM tutors are working oil & gas, chemicals or pharma process safety engineers — not career trainers. They bring real COMAH experience to the room.
DELIVERY MODEL
KeyOstas delivers the NEBOSH HSE Certificate in Process Safety Management in-company at your site — not at fixed training venues. We come to your COMAH or upper-tier facility, scheduled around your shift patterns and turnaround windows.
Bring NEBOSH PSM to your siteUK-wide and international in-company delivery — typically 4-day intensive, 6 to 12 delegates per cohort. Pricing on application — fee quotes built around delegate numbers and site requirements.
Get a fee quote →FAQ
The NEBOSH HSE Certificate in Process Safety Management (often called NEBOSH PSM or PSM Certificate) is a specialist process safety qualification co-developed by NEBOSH and the UK Health and Safety Executive (HSE). It's designed for staff in high-hazard industries — oil and gas, petrochemicals, chemicals, pharmaceuticals, refining, nuclear and water — who need to identify, assess and manage major-accident hazards on COMAH and upper-tier sites.
It's aimed at process safety engineers, HSE managers, plant operators with safety responsibility, contractors working on high-hazard sites, and anyone who supports a COMAH safety report. Existing NEBOSH General Certificate holders moving into a high-hazard role often take it as a specialism. It's not the right starting point for office-based H&S advisers — they should do the NEBOSH General Certificate first.
NEBOSH stipulates a minimum of 28 taught hours plus around 20 hours of private study (~48 hours total). KeyOstas typically delivers this as a 4-day intensive on the client's site, scheduled to fit around shift patterns and turnaround windows in high-hazard plants.
PSM1 has eight elements: process safety leadership, hazard identification, risk control hierarchy, fire and explosion hazards, safety integrity and protection layers, asset integrity and management of change, contractor and operator competence, and incident investigation including lessons from Buncefield, Texas City and Piper Alpha. The full syllabus aligns to the HSE Process Safety Leadership Principles and the Energy Institute PSM Framework.
PSM1 is assessed by a single open-book question paper exam, set and marked by NEBOSH. The paper runs for 2 hours and uses scenario-based questions drawn from real high-hazard incidents. Pass mark is set by NEBOSH each sitting. Results are typically returned within 50 working days.
The NEBOSH HSE Certificate in Process Safety Management is not formally rated against the RQF in the same way as the NEBOSH General Certificate (Level 3). It's pitched at a vocationally specialist level for delegates who already work in or support high-hazard industries. Some employers treat it as Level 3+ equivalent.
KeyOstas delivers the NEBOSH PSM Certificate as in-company training only — pricing is on application. Fee quotes are built around delegate numbers, location and any HSE/COMAH-specific scenarios you want covered. Get in touch and we'll send a tailored fee quote within one working day.
NEBOSH approves virtual/online delivery of the PSM Certificate. KeyOstas focuses on in-company delivery (face-to-face on your site or virtual classroom for distributed teams) so that scenarios can be tied to your real assets, your COMAH report and your control rooms. Pure self-paced e-learning isn't currently part of our PSM offer.
The NEBOSH General Certificate (Level 3) is the foundation H&S qualification for all sectors. The NEBOSH Diploma (Level 6) is the senior-practitioner qualification covering H&S management at a strategic level. The NEBOSH HSE Certificate in Process Safety Management is a focused specialist add-on for high-hazard industries — most delegates take it after the General Certificate or alongside Diploma study.
You can resit PSM1 at the next available NEBOSH-set sitting. NEBOSH sets resit fees centrally (typically around £160 per attempt) and KeyOstas offers a free tutor catch-up session ahead of any resit booked through us. There is no requirement to retake the taught course — the resit is exam-only.
On its own, the PSM Certificate doesn't grant IOSH membership. Combined with the NEBOSH General Certificate it supports application to TechIOSH (Technical Member of IOSH). For Energy Institute progression, PSM is widely recognised as relevant CPD and counts toward MEI / CEng route evidence.
Yes — the qualification was co-developed with the UK Health and Safety Executive (HSE), making it the only NEBOSH process safety certificate built directly with the regulator. NEBOSH awards the qualification; HSE provides the technical content and case studies.
Roles include process safety engineer (£42–£70k UK), HSE manager on COMAH sites (£55–£85k), major hazards advisor (£50–£75k), Energy Institute PSM specialist (£60–£90k), and contractor process safety lead at Tier-1 EPC firms (£55–£85k). Senior process safety roles in oil & gas regularly exceed £100k base.
KeyOstas delivers in-company NEBOSH PSM training across the UK and internationally — including refining clusters (Humberside, Stanlow, Pembroke, Fawley), petrochemicals (Teesside, Grangemouth), pharmaceutical sites and offshore. Virtual classroom delivery is available for distributed teams in EMEA and the Middle East.
The NEBOSH HSE Certificate in Process Safety Management is technically demanding — it assumes delegates already work in or support high-hazard industries (oil & gas, chemicals, pharma, refining, nuclear). The PSM1 paper is open-book and scenario-based, so it tests applied judgement rather than rote memory. Most candidates with relevant operational or engineering exposure pass first time when supported with KeyOstas tutor coaching, mock papers and HAZOP / LOPA walk-throughs. Delegates without prior process safety exposure should consider the NEBOSH General Certificate first.
Speak to a senior NEBOSH tutor about your situation, study mode and start dates.
Or talk to a tutor: 0330 056 9534
