Most shortage stories are cyclical. A sector overhires, pay spikes, training places fill, and four years later the gap has closed. The trades are different, and the reason is arithmetic rather than sentiment: the workforce is old, the replacement rate has sat below the retirement rate for two decades, and the pipeline takes three to five years to produce a competent journeyman. You cannot close that quickly even if everyone tries.
In most developed markets the median age in the electrical, mechanical and lift trades sits well above the national workforce median. Demand meanwhile is rising from three directions: electrification of heating and transport, data centre construction, and an ageing building stock that needs servicing rather than building.
The trades where the gap is widest
General construction labour follows the housing cycle. The persistent shortages sit in the licensed and maintenance-heavy specialisms, where training is long and the work cannot be deferred.
Electricians
The broadest shortage and the one most exposed to electrification — EV charging, heat pumps, battery storage, solar, and the grid work behind it. Industrial and commercial electricians with controls or high-voltage authorisation are scarcer still, and command a clear premium over domestic work.
HVAC and refrigeration
Pulled in two directions: heat pump installation on the domestic side, data centre and cold chain work on the commercial side. Refrigeration specifically is short almost everywhere, partly because refrigerant rules require certification a general HVAC engineer may not hold.
Lift and escalator engineering
A small, well-paid and quietly protected trade. The equipment is safety-critical, statutorily inspected and cannot be maintained remotely. Entry is almost entirely through employer-run apprenticeships with limited places, which is why the shortage persists.
Industrial maintenance and mechatronics
Keeping automated production and warehouse equipment running. The role has shifted from mechanical fitting toward a mix of mechanical, electrical, pneumatics, PLC and networked diagnostics. Every automation project creates maintenance demand nobody staffs for at the planning stage.
Medical equipment servicing
Biomedical technicians service imaging, surgical and life-support equipment in hospitals. The work sits under regulatory and manufacturer requirements, pays well relative to training length, and is largely recession-proof. It is also the trade most people have never heard of.
| Role | Why it pays | Time to qualify |
|---|---|---|
| Industrial / commercial electrician | Licensed work, electrification demand, high-voltage premium | 3–5 years apprenticeship |
| HVAC and refrigeration engineer | Certification-gated, year-round emergency call-out | 2–4 years |
| Lift and escalator engineer | Safety-critical, statutory inspection, tiny talent pool | 3–4 years, employer-sponsored |
| Industrial maintenance technician | Downtime costs are enormous; multi-skilled pool is thin | 2–4 years |
| Biomedical equipment technician | Regulated environment, manufacturer training required | 2–4 years plus vendor certification |
| Controls and PLC specialist | Bridges trade and engineering; scarce combination | 1–2 years on top of a trade |
The routes in
Three work, and they suit different starting points.
- Apprenticeship. Earn while you train, typically three to five years, ending with a recognised qualification and licence or registration. The strongest route if you can get a place, and competition for the better programmes is real.
- College or technical school first. A one to two year programme, then an apprenticeship or technician role. Faster to a first job in some markets, slower and costlier overall, and you pay rather than earn at that first stage.
- Sideways from a related trade or the military. Underused. Mechanical, electrical or armed-forces technical experience often lets you enter partway through an apprenticeship rather than at the start. Ask about credit for prior experience; employers rarely advertise it.
Licensing is where markets diverge most sharply. In the US it is set at state and sometimes city level, with separate apprentice, journeyman and master tiers and limited reciprocity. In the UK, competence is evidenced through recognised qualifications and scheme registration rather than a government licence. In the EU, rules vary by country but qualifications are broadly recognised across member states. Australia and Canada use formal trade certification with defined national recognition. Verify your own market first: a qualification that does not transfer is expensive.
The economics that make this worth a look
A licensed trade reaches full earning capacity in three to five years with little or no debt, because you are paid throughout training. Compare that with a four-year degree that starts earning at year five with a loan attached. The trades' weakness is not the money — it is that the money plateaus unless you specialise, supervise or run your own business.
What the work is actually like
Be honest about the trade-offs. The work is physical and the physicality accumulates; knees, shoulders and backs are the standard complaints of a twenty-year tradesperson. Call-out rotas are common in maintenance trades, which is where a chunk of the pay comes from. Conditions are unglamorous — plant rooms, roofs, crawl spaces, night shifts.
Against that: the work is tangible and finishes, demand does not evaporate in a downturn the way office hiring does, and the skill cannot be offshored.
The ceiling in the trades is not the tools. It is whether you move into supervision, specialisation or ownership by your mid-thirties — that is where the earnings curve splits.
Where careers go from there
The people who do best rarely stay purely on the tools. The common progressions are supervision and site management; specialisation such as controls, high voltage or a manufacturer's equipment; inspection and compliance, which is indoor and better paid; training and assessing; and running a contracting business, the highest-ceiling and highest-risk route.
The specialist path is the most undervalued. Adding a scarce competence — PLC programming, refrigerant certification, a specific imaging platform — to an existing trade takes a year or less and moves you into a much smaller labour pool.