Ask any project manager on Hinkley Point C what keeps them up at night and the answer is rarely budget or schedule, it’s people. Specifically, the right people, with the right certifications, clearances, and mindset to work in one of the most regulated industries on earth.

The UK is in the middle of its biggest nuclear expansion in 70 years. New build, decommissioning, and defence programmes are all running simultaneously, and they’re all drawing from the same, dangerously thin talent pool.

This is the nuclear grade problem. And it’s bigger than most people outside the industry realise.

The numbers are stark. The nuclear sector currently employs close to 100,000 people across the UK, a record high, and a 55% increase over the past decade driven by major investment in new projects.

But growth in headcount is masking a more serious structural problem: the sector needs to recruit 40,000 additional workers by 2030, at more than double the current hiring rate. Meanwhile, the engineering construction workforce alone is forecast to need to grow from 35,900 to over 46,000 by 2030 and that’s a conservative estimate that doesn’t fully account for SMR programme acceleration.

Sizewell C alone is projected to support 70,000 jobs across the UK over its lifetime. That’s before you factor in the SMR programme; with X-Energy and Centrica announcing plans for up to 12 advanced modular reactors at Hartlepool, and Holtec, EDF and Tritax planning a major SMR hub at the former Cottam power station in Nottinghamshire.

The ambition is enormous. The workforce pipeline is not keeping up.

The phrase that comes up repeatedly when you speak to project directors and procurement teams is “nuclear grade.”

In most construction or engineering environments, you find a skilled person, give them a brief induction, and they’re contributing within days. Nuclear doesn’t work like that.

Every person working on a nuclear project needs to understand the regulatory environment, the safety culture, the documentation requirements, and the implications of getting any of it wrong. For specialist roles, you add years of nuclear-specific experience on top of the underlying technical qualification.

You cannot import a general welder from a construction site and expect them to operate to nuclear standards without significant time and investment. And for roles like Safety Case Engineers or Radiation Protection Advisors, there is no shortcut at all, competence is built over years, not weeks.

Based on what we see across active projects and what clients are telling us, these are the roles creating the most recruitment pressure right now:

Nuclear Safety Case Engineers & Safety Assessors

Arguably the hardest single role to fill in the sector. Safety case engineers are responsible for building and maintaining the documented argument that a nuclear facility is safe to operate. The work requires deep technical knowledge, regulatory familiarity, and a level of professional judgement that only comes from years of direct experience.

With every major programme, HPC, Sizewell C, defence submarines, decommissioning at Sellafield, simultaneously requiring safety case expertise, there simply are not enough competent people. Unlike almost any other sector, you cannot train your way to a senior safety case engineer in under five years.

Coded Welders (TIG/MMA)

There is no shortage of welders in the UK. There is a significant shortage of welders with nuclear-grade TIG and MMA certifications who are willing to gain site clearance and work in a nuclear environment.

HPC is actively advertising these roles at premium day rates and still struggling to fill them. The nuclear premium on standard welding rates reflects the certification burden, the compliance culture, and the fact that many experienced welders find higher flexibility elsewhere.

Steel erectors, electrical technicians, and welders are identified by the ECITB as among the roles facing the highest demand growth through to 2030.

Commissioning Engineers

Commissioning engineers are responsible for testing and verifying that systems work as designed before a plant becomes operational. On a project the scale of HPC, which is unlikely to generate first power before 2029/2030, the commissioning phase will require hundreds of qualified professionals.

The challenge is that nuclear commissioning is a niche within a niche. Experience from oil and gas or conventional power is transferable to a degree, but nuclear commissioning has its own regulatory requirements and documentation demands. The pipeline of people with direct nuclear commissioning experience is thin and will come under even greater pressure as SMR programmes move into delivery.

Radiation Protection Advisors (RPAs)

RPAs are being squeezed from two directions simultaneously. Legacy sites across the UK are progressing through decommissioning, a complex, decades-long process that requires constant radiation protection expertise. At the same time, new build activity is ramping up, creating fresh demand.

The qualification pathway for an RPA is long and regulated. You cannot create more of them quickly. And unlike some roles where oil and gas or defence crossover is relatively straightforward, RPA work is highly nuclear-specific.

Project Planners with Nuclear Experience

This one surprises people outside the industry. Surely a planner is a planner?

Not in nuclear. Nuclear programmes involve multi-decade timelines, complex multi-contractor interfaces, regulatory hold points, and documentation requirements that exist nowhere else. A planner who has managed large infrastructure projects but has never worked in nuclear will spend a significant proportion of their first year just understanding the environment.

People with genuine nuclear project planning and programme management experience are consistently flagged by clients as among the scarcest resources on any project.

Electrical Engineers (Systems Integration)

The nuclear sector’s growing need to interface with modern grid infrastructure, digital control systems, and renewable energy assets has created a new type of requirement: electrical engineers who understand both nuclear regulatory compliance and modern systems integration.

This crossover skillset is genuinely rare. Most engineers have depth in one area or the other, not both. As new build projects move into more advanced phases and SMRs begin to take shape, this gap will widen significantly.

The skills shortage isn’t new, and it isn’t the result of inaction. The industry has known about it for years. The challenge is structural:

• The UK had 16 functioning nuclear power stations in 1994. By 2024, it had five. A generation of young engineers chose other sectors; there was no nuclear career to speak of for much of the 2000s and 2010s.
• The people who built the last generation of UK plants are now retiring, taking with them decades of institutional knowledge that cannot simply be written down and transferred.
• Nuclear-specific competence takes years to develop. Unlike sectors where skills can be rapidly acquired, the regulatory and safety culture of nuclear requires sustained immersion.
• Security clearance requirements mean that international recruitment, a pressure valve used widely in construction and engineering, has significant limitations in nuclear, particularly in defence.
• The sector has historically struggled to attract diverse talent, limiting the size of the pool it draws from. The workforce remains predominantly male, and the industry is working to address this, but progress is slow.

The government recognises the scale of the problem. The National Nuclear Strategic Plan for Skills has set targets for doubling apprentice numbers, tripling PhDs, and launching national awareness campaigns. Nearly 3,500 early-careers starters entered the sector in 2024/25. The “Destination Nuclear” campaign is actively marketing the sector as a career destination.

These are the right interventions. But they are long-term plays. The 24GW ambition by 2050 and the 40,000 jobs needed by 2030 require a workforce that is being built right now, from a starting point that is already under pressure.

For clients and projects, the practical implications of the nuclear grade problem are well understood but worth stating clearly:

• Specialist roles will take longer to fill than equivalent roles in other sectors. Build this into your resourcing timelines.
• Competition for the best people is intense. Salary expectations have moved. A “market rate” from 2022 is no longer the market rate.
• Retention matters as much as recruitment. Once you have experienced nuclear professionals, the cost of losing them, and the difficulty of replacing them, is significant.
• Workforce planning needs to start earlier. The projects that are least affected by the skills shortage are the ones that engaged their supply chain and recruitment partners years ahead of peak demand.

For people considering a career in nuclear, or looking to transition from oil and gas, defence, renewables, or major infrastructure, the opportunity is genuinely significant. The sector is growing, the work is long-term, and the pay reflects the specialist nature of the roles.