DWDM / Optical Transport Engineer
Industry: Telecommunications / Data Centre / Network Infrastructure
Role Summary
We are looking for a hands-on DWDM / Optical Transport Engineer to support the design, implementation, operation, maintenance, and troubleshooting of carrier-grade optical transport networks in Singapore.
The engineer will be responsible for day-to-day support of DWDM / OTN infrastructure, circuit provisioning, fault isolation, preventive maintenance, service activation, migration works, and coordination of after-office-hours maintenance or emergency restoration activities.
This role is suitable for a technically strong engineer who is comfortable working in live production environments, data centres, meet-me rooms, and customer / carrier interconnection facilities, and who can respond calmly and effectively during service-impacting incidents.
Fresh graduates can apply.
Key Responsibilities / Job Scope
1) Optical Network Operations
- Operate, maintain, and support DWDM optical transport systems in live environments.
- Monitor network health, alarms, optical performance, and circuit availability.
- Perform routine checks on optical links, transponders, muxponders, amplifiers, passive optical components, and related transport equipment.
- Support preventive maintenance and network housekeeping activities to maintain service stability.
2) Provisioning and Service Delivery
- Provision new optical circuits and customer services across backbone, inter-DC, and carrier interconnect environments.
- Perform service turn-up, light testing, patching, labelling, cross-connect verification, and end-to-end link validation.
- Coordinate with internal teams, carriers, data centres, and customers for implementation activities.
- Support migrations, re-routing, expansion works, and decommissioning of optical services.
3) Troubleshooting and Incident Response
- Investigate service issues such as LOS, LOF, LOA, BER degradation, CRC-related customer complaints, optical power imbalance, link instability, module mismatch, and interoperability issues.
- Carry out fault isolation using optical and transport-layer troubleshooting techniques, including checking fibre path, patching, optics, interface counters, and performance indicators.
- Work with remote hands, field contractors, carrier NOCs, and equipment vendors to restore services in the shortest possible time.
- Escalate issues appropriately and prepare incident findings / post-mortem summaries where required.
4) Testing and Acceptance
- Conduct and support technical testing such as:
optical power measurement
end-to-end light level verification
loopback testing
service activation checks
BERT / RFC-style validation where applicable
interoperability checks between optics / platforms
- Ensure all implemented links meet technical and operational acceptance standards before handover.
5) Data Centre and Site Activities
- Attend data centres, customer premises, POPs, or carrier facilities for implementation, troubleshooting, migration, and emergency restoration work.
- Perform rack-level work including patching, tracing, port verification, physical inspection, basic equipment replacement, and coordination of smart hands / remote hands.
- Maintain accurate labelling, documentation, fibre records, and patching standards.
6) Documentation and Reporting
7) Change Management and Maintenance
- Plan and execute scheduled maintenance, service migrations, and midnight / after-hours cutovers with minimal downtime.
- Participate in change reviews, risk assessments, rollback planning, and implementation planning.
- Ensure proper communication before, during, and after maintenance windows.
8) Stakeholder Coordination
- Liaise with:
carrier/ telco NOCs
data centre operators
vendors/ OEM support teams
field engineers / contractors
internal sales / project / operations teams
customers where technical clarification is needed
- Provide clear technical updates during incidents and implementation work.
Requirements
Mandatory Requirements
- Degree in Telecommunications, Electronics, Electrical Engineering, Computer Engineering, Network Engineering, or related discipline.
- Proven experience in DWDM / optical transport / transmission network support.
- Good understanding of:
DWDM / CWDM concepts
optical attenuation and power budget
transceivers / optics compatibility
fibre patching and fibre troubleshooting
optical transport service activation and fault isolation
- Able to work independently at data centre and site environments.
- Able to support after office hours maintenance, midnight cutovers, and rare emergency downtime restoration.
- Must be able to travel independently to islandwide sites / data centres at short notice, especially for urgent service restoration or planned maintenance.
- Strong sense of responsibility, urgency, and ownership during network incidents.
Preferred / Added Advantage
Soft Skills / Behaviour
- Calm and methodical in troubleshooting live incidents.
- Strong documentation discipline.
- Able to communicate clearly with both technical and non-technical stakeholders.
- Good planning and execution skills for maintenance works.
- Willing to be hands-on and physically attend sites when required.
- Team player with strong accountability.
Working Conditions
- Normal office hours, with requirement to support:
- after-hours maintenance windows
- midnight cutovers
rare emergency restorations / downtime
standby duty where required
- Role may require travel to:
data centres
- POPs
customer sites
carrier / interconnection facilities across Singapore
