Why the most important buildings of the AI age can't find enough people

Every chatbot answer, every video call, every card payment ends up as electrons in a building most people have never seen the inside of. Those buildings — data centres — are being built faster than at any point in history, and the industry has a problem it doesn’t like to admit: it cannot find enough people to run them.

Not software engineers. The other kind. The people who keep the power on and the cooling running: technicians, electricians, mechanical engineers, shift leads, the operations teams who walk the floor at 3am.

The quiet career nobody told you about

Here’s what three decades in critical infrastructure have taught me about this industry:

• You don’t need a degree. I started as a generator mechanic. The floor is full of ex-electricians, ex-forces, ex-IT people, and career changers who learned fast and took procedures seriously.
• It pays properly. Entry-level roles beat most trades work; senior technicians and shift leads earn comfortably above the national average, before shift premiums.
• It’s genuinely interesting — if you like systems. A data centre is a power station, a refrigeration plant, a fire-protection system, and a fortress, all pretending to be a warehouse.
• And the demand curve only points one way. AI workloads have changed the physics of these buildings — higher density, liquid cooling, bigger sites — and every change creates jobs that didn’t exist five years ago.

What this site is

The DC Engineer is a field manual, not a content farm. Two routes:

Route A — Break in. What the job titles mean, what they pay, which entry route fits your background, and how to pass the interviews.

Route B — Level up. You’re already inside. Now build the systems depth and incident judgement that move you from technician toward principal engineer.

Everything here is written by one engineer — me — from 30 years on the floor: military-contractor power plants in Kuwait, QA/QC inspection, critical power across London, colocation shift leadership through a triple ISO certification, and hyperscale operations since 2021. No vendor sponsorships, no recruiter commissions, and I never write about any specific employer.

Start here

The free starter pack covers the role map, realistic salaries, entry routes by background, and the ten interview questions you should be ready for. The full curriculum — every system in the building, plus the career guide — is in the book, launching this summer.

Welcome aboard. Mind the step plates.