Copper or Fibre: Which Specialism Holds Its Value for the Next Five Years
The Question Engineers Keep Asking
Sooner or later, most structured cabling engineers are asked, or ask themselves, which way to lean. Keep building depth on copper, where most of the day to day commercial work still sits, or commit properly to fibre, where the headlines and the data centre programmes seem to be.
It is a fair question, because training time and certification costs are real, and the projects you get offered depend heavily on what your CV says you are good at. It is also a question that tends to get answered with slogans. Fibre is the future. Copper is dying. Neither is a useful guide to where the work will actually be.
A better way to approach it is to look at where each medium is being specified today, what is driving that, and which skills sit on top of both.
Where Fibre Demand Is Coming From
The strongest pull on fibre skills is inside data centres, and specifically AI data centres. Densely packed GPU clusters need far more connections between servers, switches and storage than a traditional hall. Speaking to the Fiber Broadband Association in April 2026, AFL's Director of Strategic Innovation described the increase inside the walls of AI facilities as anything between a 10 and 20 fold increase in fibre compared with traditional configurations.
That demand is not only about volume. High fibre count trunks, MPO and MTP connectivity, very low loss budgets and tight documentation requirements mean data centre fibre work rewards precision. Engineers who can terminate, test and certify high density links to a data centre standard are in a different position from engineers who have pulled some fibre on a commercial job.
Outside the data hall, telecoms networks remain a major source of fibre work. In the UK, Openreach has been building towards 25 million premises passed with full fibre by the end of 2026, and tracking by thinkbroadband in September 2026 put the number of premises ready for service at around 23.5 million. Openreach has also set out plans to continue building beyond that. Across Europe, similar programmes are running at different stages.
The honest caveat is that access network fibre and data centre fibre are related but different trades. Splicing and building out a street network is not the same job as certifying MPO trunks in a live hall, and the progression routes differ. It is worth being clear which fibre you mean when you plan your next step.
Why Copper Is Not Going Anywhere
The case for copper is less visible but just as solid. Almost every commercial building still relies on copper for the last connection to the device, and the devices are changing in ways that make that copper more demanding, not less.
Wi-Fi 7 access points are the clearest example. They typically need multi-gigabit uplinks and higher Power over Ethernet budgets, which is why Cat6A is widely treated as the practical minimum for new wireless deployments. Power over Ethernet itself has grown up: the IEEE 802.3bt standard supports up to 90W at the power sourcing equipment, enough to run lighting, cameras, access control and displays from the network.
Each of those trends makes the quality of the copper installation matter more. Higher power means more heat in bundles. Higher data rates mean less tolerance for poor terminations, kinks and untidy containment. A copper engineer who understands bundle sizing, heat and certification to Cat6A performance is not doing yesterday's job. They are doing the job that makes a modern building work.
Copper also stays close to the equipment inside data centres, where short connections within and between racks are frequently copper based. The balance there shifts towards fibre as speeds rise, but the physical layer is rarely all one medium.
What Actually Holds Its Value
Looking five years ahead, the more useful question is not which medium wins, but which skills stay scarce. Three stand out.
The first is testing and certification. Whatever is installed has to be proven, and the engineers who can plan a test regime, interpret results and produce a clean handover pack are consistently in demand on both copper and fibre projects.
The second is working in demanding environments. Live data centres, occupied offices and critical sites all require discipline around method statements, access and documentation. That experience travels across media and across countries.
The third is range. Engineers who can move between copper and fibre on the same project are easier to deploy and harder to replace, particularly on smaller teams or multi-site programmes where a single specialist per medium is not practical.
A Practical Way to Decide
If you are mainly copper today, adding fibre is the move with the most upside, especially if data centre work appeals. Start with a recognised foundation qualification such as the FOA's CFOT, get real hours on termination and testing, then build towards data centre specific credentials if that is the direction.
If you are mainly fibre today, do not let copper skills fade. Being able to install and certify Cat6A properly, and to understand Power over Ethernet and heat, keeps you useful on the commercial projects that make up a large share of the market.
If you are early in your career, avoid over specialising too soon. A few years of broad exposure, followed by a deliberate choice based on the projects you enjoy, tends to produce a stronger position than choosing a side on day one.
And whichever way you lean, make testing part of your identity rather than an afterthought. It is the skill that sits on top of both media, and it is the one that most often decides who gets the more interesting work.
A Final Thought
Fibre is growing fastest, particularly in data centres, and it rewards engineers who invest in it properly. Copper is not shrinking in importance, it is becoming more demanding. The engineers who hold their value best over the next five years will be the ones who can work confidently across both and prove their work to a standard someone else can audit.
iCobus works with structured cabling, fibre and ICT specialists across the UK and Europe, on data centre, commercial and telecoms projects. If you are weighing up your next step, our consultants are happy to talk through where your current skills are most in demand.
