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Data Centre Technician: Racks, Power, Cooling, Cabling and Remote Hands

Learn the job behind the cloud: how data centres keep running, and how to rack servers, handle fibre, follow tickets and procedures, and work safely in a Lagos data hall.

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About this course

A hands-on course that follows a new night-shift technician through her first months at a Tier III colocation data centre in Lekki, Lagos. You will learn what a data centre is for and how it stays up: security and access, racks and servers, the power chain from the grid and generators through 2N UPS to A and B feeds, cooling and airflow with hot and cold aisles, and structured copper and fibre cabling. You will practise the core work of the job: racking equipment safely, doing rack power sums, inspecting and cleaning fibre, reading switch lights and console access, completing remote-hands tickets such as a hot-swap drive replacement, following change control and methods of procedure, handling incidents, doing rounds and keeping logs that others can trust. Safety and customer confidentiality run through every lesson: heavy lifting, electrical limits, gas fire suppression, laser light and never touching what is not in the ticket. The last lesson shows where the jobs are in Nigeria and how to grow. Lessons include narrated animated explainers, credited photos and short silent clips. Videos play only when you tap them, so no data is used until you choose. Free, like every Skillnaija course.

It is 9.40 pm in Lekki and Amaka Nwosu, 24, a computer science graduate on her first night shift, is standing in front of a steel door at Eko Data Hub. Her new badge beeps green. The first door opens into a small glass box, the mantrap, and closes behind her before the second door will even consider her fingerprint. Then the noise hits: a steady roar of thousands of fans, cold air pushing up through the floor tiles, rows of black cabinets blinking blue and green. Her shift lead, Mr Babatunde Akin, fifteen years in data centres, hands her a pair of ear defenders. "Welcome," he says. "Two rules before anything else. If it's not in the ticket, it doesn't happen. If it's not labelled, it doesn't exist."

Who this course is for

For technically curious people without a computer science degree — OND and HND holders, NYSC members, IT support staff, electricians and anyone who is comfortable with tools and wants a foot in the door of Nigeria's fastest-growing infrastructure sector. It is also a good first course for people who plan to move into networking, cloud or systems administration later and want to understand the physical layer first.

What you'll learn

By the end you will be able to

Pay, demand and the market in Nigeria

Nigeria's data-centre capacity has roughly tripled since 2022, with MainOne (Equinix), Rack Centre, Open Access Data Centres, Galaxy Backbone, Kasi and new hyperscale sites in Lagos, Abuja and Port Harcourt, plus the private facilities of banks, telcos and fintechs. Junior technician and facility-operations roles in 2026 start at roughly ₦150,000 to ₦300,000 a month at operators, more at multinationals and banks, with shift allowances, and move to ₦400,000 to ₦900,000 with a few years' experience and vendor certifications. The work is 24/7, on-site and physical, which is exactly why it is hard to offshore and why operators struggle to find trained hands.

Tools and what it costs to start

Nothing to buy. The course uses diagrams and photographs of real racks, cabling and power chains, and the project is a paper field pack. If you want to practise, a cheap cable tester and a set of patch cables are useful, and visiting a training lab or a colocation facility's open day is recommended in the final lesson.

Course syllabus — 12 lessons

  1. What a data centre is, and what a technician actually does16 min
  2. Security, access and how to behave in a data hall16 min
  3. Racks, servers and the parts you will touch16 min
  4. Racking and stacking equipment safely17 min
  5. Power: from the grid to the server17 min
  6. Cooling and airflow16 min
  7. Structured cabling: copper and fibre17 min
  8. Networks for data centre technicians16 min
  9. Remote hands: tickets and smart hands work17 min
  10. Change control, MOPs and incidents17 min
  11. Monitoring, rounds and preventive maintenance17 min
  12. Getting the job and growing in data centres17 min

Your project

Your Junior Technician Field Pack

One shared link (a Google Doc, or a folder with view access) containing every part. Hand-drawn diagrams photographed are fine.

You produce a junior technician's field pack: a labelled rack sketch, the power chain from utility to server with a hot-aisle/cold-aisle drawing, a live-rack safety checklist and a short statement of where you would apply and why. It is graded on accuracy and on whether an operations manager could hand it to a new hire.

Certificates on Skillnaija are earned, not issued for attendance: you submit this project, it is graded against a rubric, and passing issues a certificate anyone can verify. See the full project brief, rubric and free workbook →

Frequently asked questions

Is Data Centre Technician: Racks, Power, Cooling, Cabling and Remote Hands free?

Yes. Data Centre Technician: Racks, Power, Cooling, Cabling and Remote Hands is completely free on Skillnaija. You need a free account to open the lessons, and there is no charge for the course, the project, or the certificate.

How long does Data Centre Technician: Racks, Power, Cooling, Cabling and Remote Hands take to complete?

6 weeks · ~5 hrs/week. There are 12 lessons, about 3 hours of material in total. You learn at your own pace and your progress is saved.

Do I need any experience to start Data Centre Technician: Racks, Power, Cooling, Cabling and Remote Hands?

Beginner-friendly; basic computer skills needed. You can start from scratch — no prior experience is assumed.

What will I learn in Data Centre Technician: Racks, Power, Cooling, Cabling and Remote Hands?

You will build practical skills in Data hall security, access and conduct, Racks, servers and hot-swap components, Safe racking and stacking, Power chain, 2N redundancy and rack power sums, Cooling, airflow and PUE, Copper and fibre cabling, inspection and cleaning, Switch ports, consoles and out-of-band access, Remote hands and ticket work, Change control, MOPs and incident handling, Monitoring, rounds and preventive maintenance, Data centre careers in Nigeria. Every lesson is written for a Nigerian context, with examples drawn from how the work is actually done and paid for here.

Do I get a certificate for Data Centre Technician: Racks, Power, Cooling, Cabling and Remote Hands?

Yes, but it has to be earned. You complete the course project — Your Junior Technician Field Pack and submit it for grading. Passing the project issues a verifiable certificate; finishing the lessons alone does not.

Do I need a degree to work in a data centre in Nigeria?

Not for technician and facility roles. Operators hire OND/HND holders and career changers with electrical or IT support backgrounds, and value safety discipline and reliability over paper. A degree helps for engineering and management tracks later.

Which certifications should I get after this course?

CompTIA A+ or Network+ for the IT side, and a vendor course such as Schneider Electric's data centre fundamentals or the CDCTP for the facility side. This course gives you the vocabulary to pass those and the practical picture they assume.

Is the work dangerous?

It carries real electrical, lifting and equipment risks, which is why safety and ESD get their own lesson and why every operator has strict procedures. Trained technicians who follow procedure have a safe career; the course is blunt about what not to touch.

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