Data centre engineer

What does a data centre engineer do?

A data centre engineer keeps the servers, storage, network equipment, power and cooling in a data centre running.

You monitor systems, fix faults and help install new equipment. You also keep records of what was changed and why.

The role sits in the infrastructure or operations team. In Singapore, that means a data centre operator, a bank, a telco, a government agency or a large enterprise with its own facility. Operators host equipment for many customers, while enterprises run their own halls.

You work with network engineers, systems administrators, facilities and electrical teams, vendors and the service desk. Business teams and customers rely on you for uptime. You often escalate recurring faults to senior engineers or managers.

What the work involves

• Watch monitoring dashboards for alarms on power, temperature, network links and server health.
• Troubleshoot hardware and connectivity faults, then record the cause and the fix.
• Rack, cable and label new servers and network gear during planned installation windows.
• Track capacity: rack space, power draw, cooling and bandwidth.
• Update runbooks, asset records and shift handover notes.
• Log service level results and flag incidents that keep coming back.

Pay in Singapore

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Skills a data centre engineer needs

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Data centre engineer job description

We are hiring a data centre engineer to monitor, maintain and support the equipment in our Singapore data centre.

You will respond to incidents, assist with installations and keep documentation accurate. You will work in shifts with network, systems and facilities teams. Experience with Linux, networking basics and ITIL processes is useful.

Responsibilities

• Monitor data centre systems and respond to alarms within agreed service levels.
• Troubleshoot and resolve hardware, power, cooling and connectivity incidents.
• Install, cable, label and decommission servers and network equipment.
• Follow the organisation's change, incident and access procedures.
• Keep asset records, diagrams and runbooks up to date.
• Collect data on bandwidth, power and space to support capacity planning.
• Record incidents and resolutions so the team can refer to them later.
• Help prepare and test disaster recovery and business continuity plans.
• Track service level results and report recurring faults to senior staff.
• Escalate vendor or contract breaches to the right owner.

Requirements

• Diploma or degree in IT, computer engineering, electrical engineering or a related field. Some employers accept experience instead.
• Zero to 3 years in data centre, server or network support is typical for entry and mid roles.
• Working knowledge of TCP/IP, switching, cabling and basic Linux commands.
• Familiarity with ITIL incident, problem and change management.
• Willingness to work shifts, including nights, weekends and public holidays.
• Ability to lift equipment and work in a cool, noisy environment.

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Data centre engineer career path

Most data centre engineers start in monitoring and support, then take on more independent troubleshooting and planning.

Senior steps move toward running operations and managing vendors and teams.

1. Associate data centre operations engineer

   Entry · SkillsFuture title

   You monitor systems, support equipment installation and troubleshoot recurring issues with guidance. You also keep internal documentation current.

2. Data centre operations engineer

   Mid · SkillsFuture title

   You handle incidents on your own, work on capacity and service level tracking, and help plan set-ups and disaster recovery.

3. Senior data centre engineer

   Senior

   You lead complex fixes and installations, review changes and coach junior staff. You advise on vendor choices and design impacts.

4. Data centre operations manager

   Lead

   You run a shift team or site, own service levels and incident response, and manage vendors and budgets.

5. Head of data centre operations

   Head

   You are accountable for the reliability, capacity and risk of one or more sites, and you report to senior technology leaders.

Steps marked "SkillsFuture title" follow the career pathway in the SkillsFuture Skills Framework. The others are titles commonly used in Singapore.

Related jobs and their pay

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Data centre engineer interview questions

We wrote these questions from the skills this job needs. They are not an official question bank.

1. A server in a rack stops responding. How do you find out whether the fault is hardware, power or network?

   What a good answer covers

   • Check monitoring and alarms first, then the physical state: lights, power and cable seating.
   • Test the power feed and the power distribution unit port.
   • Use the out-of-band management port to view logs and console.
   • Check the switch port, VLAN and link status.
   • Swap parts or cables one at a time and record each step.

2. Explain N+1 and 2N redundancy for power and cooling. When would a customer pay for 2N?

   What a good answer covers

   • N+1 adds one spare unit beyond the capacity needed; 2N duplicates the full system.
   • Mention UPS, generators and A and B power feeds.
   • 2N suits workloads that cannot tolerate downtime, such as payments or trading.
   • Higher redundancy costs more and uses more space.
   • Failover needs to be tested for redundancy to help.

3. Why do hot aisle and cold aisle layouts matter, and what makes cooling harder in Singapore?

   What a good answer covers

   • Separate aisles stop hot exhaust air mixing with cold intake air.
   • Blanking panels and containment improve airflow.
   • Singapore's heat and humidity raise cooling load and affect efficiency.
   • Watch temperature and humidity sensors for hot spots.
   • Dense racks need more careful airflow planning.

4. A Linux server is slow and the load is high. Which commands do you run and what do you look for?

   What a good answer covers

   • Use top or htop to see CPU, memory and the busiest processes.
   • Check disk use and input/output with df and iostat.
   • Check memory and swap with free.
   • Read system logs with journalctl or in /var/log.
   • Check network connections with ss, then escalate with notes.

5. A new server cannot reach the network. Walk through your checks from the cable upward.

   What a good answer covers

   • Check the cable, transceiver and port light.
   • Check switch port status, speed and VLAN assignment.
   • Check the IP address, subnet mask and gateway on the server.
   • Test with ping to the gateway, then beyond it.
   • Check for IP conflicts, DNS and firewall rules.

6. What is the difference between an incident, a problem and a change in ITIL? Give a data centre example of each.

   What a good answer covers

   • An incident is an unplanned interruption, such as a failed power supply.
   • A problem is the underlying cause, such as a faulty batch of supplies.
   • A change is a planned modification, such as replacing the batch.
   • Problem records help stop incidents from repeating.
   • Changes need approval, a plan and a rollback.

7. You must install ten servers in a live hall. How do you plan the work?

   What a good answer covers

   • Check rack space, power, cooling and network port capacity first.
   • Raise a change request with a window, steps and rollback plan.
   • Prepare labels, cables and rack positions beforehand.
   • Test and burn in the equipment before it goes live.
   • Update asset records and diagrams once done.

8. How would you track capacity in a data centre, and what warning signs would you report?

   What a good answer covers

   • Track space, power draw, cooling and network bandwidth together.
   • Record usage over time and compare with limits.
   • Flag racks near their power or cooling ceiling.
   • Note upcoming customer or project demand.
   • Report to senior staff early so procurement has lead time.

1. At 2 am, an alarm shows rising temperature in one hall after a cooling unit fails. What do you do?

   What a good answer covers

   • Confirm the alarm with sensors and a physical check.
   • Follow the incident runbook and notify the on-call manager and cooling vendor.
   • Reduce heat load if allowed, such as moving or powering down non-critical systems.
   • Update affected customers or teams at set intervals.
   • Document the timeline and join the post-incident review.

2. A hardware vendor keeps missing the agreed time to replace failed parts. What do you do?

   What a good answer covers

   • Gather the dates and times of each missed target.
   • Check the contract terms for the service level.
   • Escalate the breach to the contract owner with evidence.
   • Look at spare parts on site as a short-term fix.
   • Raise the pattern as a recurring issue with senior management.

3. A contractor says a manager approved their entry to a customer cage, but the name is not on the access list. What do you do?

   What a good answer covers

   • Hold entry until the approval is verified.
   • Contact the named manager or the access control owner using known contacts.
   • Follow the visitor and escort policy.
   • Record the request and the outcome.
   • Explain the reason politely and offer the correct process.

1. Describe a mistake you made during maintenance or an installation. What happened next?

   What a good answer covers

   • Choose a real, specific example.
   • Say how you spotted it and who you told.
   • Explain the fix and the impact.
   • Describe the checklist or habit you changed afterwards.
   • Show you took ownership and did not blame others.

2. How do you hand over to the next shift when an incident is still open?

   What a good answer covers

   • Write down the status, actions taken and next steps.
   • List contacts, tickets and vendor references.
   • Talk through the handover in person or on a call.
   • Flag risks and deadlines clearly.
   • Confirm the next person understands before you leave.

1. You are decommissioning servers that held customer personal data. How do you handle the disks under the Personal Data Protection Act (PDPA)?

   What a good answer covers

   • Explain that the organisation must protect personal data it holds and not keep it longer than needed.
   • Confirm what data sits on each device using asset records.
   • Use approved wiping or physical destruction and keep certificates.
   • Track the chain of custody for each disk.
   • Involve the data protection officer if you are unsure.

2. A bank customer hosts systems in your data centre. What kind of controls would you expect them to ask about?

   What a good answer covers

   • Mention that financial institutions follow Monetary Authority of Singapore (MAS) technology risk and outsourcing expectations.
   • Expect questions on physical access, resilience and incident reporting.
   • Expect requests for audit rights and evidence of testing.
   • Keep logs, records and procedures ready for review.
   • Pass formal compliance questions to the compliance or risk team.

Common questions about a data centre engineer job

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