The MRO skills gap: how UK engineering and maintenance firms stop the hidden talent drain

Why is MRO such a big opportunity for the UK?

Every aircraft flying today needs decades of inspections, repairs and overhauls. Aviation Week expects the global MRO market to reach about $139 billion in 2026, and across aerospace, aftermarket revenue now matches or beats the money made building new aircraft.

The UK is strong at the building part. The UK Innovation Report 2024 puts the UK’s share of aerospace original-equipment supply chains at around 13%, but its share of the global MRO market at only about 3%. Singapore, with far less manufacturing heritage, holds roughly 10%.

Closing even part of that gap would mean many more skilled jobs, many of them in places like the West of Scotland, where aerospace and engineering clusters already exist. But winning more MRO work needs more competent people, faster, and that’s where most growth plans stall.

What is the MRO skills gap?

The MRO skills gap is the distance between the technicians and engineers the sector needs and the number who are fully competent and available. Several pressures are hitting at once:

• Demand is soaring. Boeing’s 2025 outlook says the world will need about 710,000 new aircraft maintenance technicians over the next 20 years.
• The workforce is ageing. In North America, the average certified aviation mechanic is now 54 years old, and the 2025 shortfall is around 10% of what airlines need (ATEC and Oliver Wyman, 2025).
• Competence takes years. Training a skilled technician from scratch takes four to six years (Scottish Engineering skills gap analysis).
• Firms aren’t training enough. In the same Scottish analysis, demand for electrical and electronic technicians reaches 147% of today’s headcount by the end of 2027, yet only 24% of firms plan to train those roles in-house. About 20% of apprenticeship demand already goes unmet.
• The work is going digital. Predictive maintenance, digital twins, AI diagnostics, robotic inspection and composite repair all need technicians who are comfortable with data and digital tools, not only spanners.

And most UK MRO providers are small or medium-sized firms, many without an HR team, a training department or time to run big programmes. They feel every one of these pressures hardest.

What is the hidden talent drain?

When people talk about the cost of the skills gap, they usually mean vacancies. The bigger cost is hidden inside the people you already hired. We call it the talent drain: profit that hides at every stage of an employee’s journey, from hire to exit.

1. Hire. A mis-hire costs recruitment fees, management time and lost output. Leadership IQ found 46% of new hires fail within 18 months (more on the cost of a bad hire).
2. Onboard. A new employee in the UK takes an average of 28 weeks to reach full productivity, according to Oxford Economics. For licensed engineering roles it’s often far longer.
3. Train. When training lives in one expert’s head or a binder of SOPs, every new starter learns a slightly different version of the job.
4. Comply. Under Part-145, a maintenance organisation must establish and control the competence of everyone who maintains, manages or audits work. Proving that from spreadsheets and paper sign-offs eats days before every audit.
5. Retain. About one in five leavers walk out within their first 45 days (BambooHR, via Axonify), and replacing one employee costs a UK business about £30,600 (Oxford Economics, via HR Review).

How much does the talent drain cost an engineering firm?

Here’s a cautious worked example using a simple calculation. It counts only two costs: lost output while new hires ramp up, and the hiring cost of replacing leavers.

That’s about 4.7% of payroll, and it’s the conservative end. It leaves out mis-hires, the senior engineers’ time spent supervising and correcting, rework, scrap, audit findings and lost customers. Add those in and the full drain can approach 10% of payroll. For a 1,000-person engineering business, that is a multi-million-pound problem hiding in plain sight.

How do you build competent technicians faster?

You can’t make a four-year apprenticeship take four weeks. But you can stop wasting the time you do have, and get every new starter productive on real tasks much sooner. Five moves make the biggest difference.

1. Capture expert know-how before it retires

Your most experienced engineers carry the tricks that never made it into the manual. Film them doing the task on a phone, tablet or smart glasses while they talk it through. AI then turns the footage into step-by-step work instructions, translated where needed, in hours rather than months.

2. Guide people on the job, not in a classroom

Technicians learn fastest at the aircraft, the machine or the bench. Step-by-step instructions on smart glasses or a tablet keep their hands free, and a remote expert can see what they see when something unusual turns up. That cuts the shadowing time senior engineers spend repeating the same explanations. See the technology.

3. Make onboarding a 30-60-90 day path

Replace a pile of documents with a structured journey: safety and compliance first, then supervised tasks, then signed-off independent work. Pair every new starter with a mentor, and check in at day 30, 60 and 90. That’s how you keep the one-in-five who would otherwise walk out in the first six weeks (our onboarding guide).

4. Score competence, don’t assume it

Record every step, check and sign-off as the work happens. Observation checklists and skills matrices then show exactly who is competent on what, which certifications are about to expire, and where the gaps are, so audit evidence is ready before anyone asks (observation checklists).

5. Widen the talent pool

Automotive, energy, defence and general manufacturing all have people with transferable skills. A clear, guided path into MRO tasks, with competence proven step by step, makes cross-sector hiring far less risky.

Why SMEs can move faster than anyone

Large organisations need multi-year programmes to change how they train. A 40-person MRO shop or engineering firm doesn’t. Without an L&D department, the right tools matter more, not less: they need to go live in hours, run without IT projects, and work on the shop floor rather than at a desk.

That’s what Skills Velocity is built for. It captures your experts’ know-how, turns it into guided work and training, tracks competence for audits, and shows the impact in ramp-up time, retention and audit findings, not course completions. It’s the practical, on-the-ground half of any national skills push: the part that turns new investment, new centres and new apprenticeships into technicians who are competent, faster.

Frequently asked questions

What is MRO in aerospace?

MRO stands for maintenance, repair and overhaul: the inspections, repairs, component overhauls and modifications that keep aircraft and their engines safe and airworthy throughout their working life.

How long does it take to train an aircraft maintenance technician?

Training a skilled technician from scratch typically takes four to six years. Guided on-the-job learning can’t skip the licensing and experience requirements, but it does get new starters productive on real, supervised tasks much sooner.

How can MRO firms capture knowledge before experienced engineers retire?

Film experienced engineers performing key tasks while they explain what they’re doing, then turn the recordings into step-by-step digital work instructions. Store them where technicians can call them up at the point of work, and update them as lessons are learned.

How do you prove technician competence for a Part-145 audit?

Record competence as the work happens: signed-off steps, observation checklists, assessments and certification dates, all in one system. Then a skills matrix for any person, team or task is a click away, rather than days of searching through paper.

What does staff turnover cost an engineering firm in the UK?

Oxford Economics puts the cost of replacing one employee at about £30,600, mostly lost output while the replacement gets up to speed. For a 1,000-person engineering firm with 12% turnover, ramp-up and hiring costs alone come to around £2.1 million a year.

Ready to stop the drain?

Bring one SOP or task card to a demo and we’ll turn it into live, trackable training while you watch. Book a demo.