Network Engineer

STARHUB LTD.; Singapore; On-site; SGD 66,960 - 111,600; Full time

Job summary

STARHUB LTD. in Singapore is seeking a Network Engineer to support and maintain mission-critical wireless and network infrastructure at client sites. You will troubleshoot, implement, and monitor Cisco and Aruba wireless solutions, switches, firewalls, and related services in a 24/7 environment.

You will coordinate with vendors, perform preventive maintenance, firmware upgrades, and participate in incident response. Strong communication and the ability to work after hours are essential.

Qualifications

• Diploma or Degree in IT/Networking required, with 3–5 years hands-on network/wireless experience.
• Strong knowledge of Cisco WLC and Aruba wireless, switching/routing, firewalls, DNS/DHCP/VLANs, and authentication systems.
• Experience with monitoring tools Cisco Catalyst Center, AirWave, SevOne, ServiceNow.
• Familiarity with incident management, RCA, and maintenance processes; enterprise or mission-critical experience is a plus.
• CCNA/CCNP, Aruba AC/AC Professional, ITIL Foundation preferred.

Responsibilities

• Support day-to-day wireless infrastructure operations and maintenance.
• Troubleshoot wireless connectivity, DNS, DHCP, captive portal, OTP login, and VLAN issues.
• Coordinate with vendors (Cisco/Aruba TAC) for issue resolution.
• Perform firmware upgrades, patches, and technology refresh for wireless/network gear.
• Assist in WLC upgrade activities, AP image updates, failover testing, and rollback planning.
• Prepare incident reports, RCA findings, and preventive recommendations.
• Maintain technical documentation and support after-hours maintenance when needed.
• Ensure governance, safety and change management compliance.

Skills

Troubleshooting

Stakeholder coordination

Communication

Independence

After-hours support

Education

Diploma/Degree in IT/Networking

Tools

Cisco Catalyst Center

AirWave

SevOne

ServiceNow

Job description

Job Description

This role will be based at client site. Network Engineer is responsible for supporting and maintaining mission-critical Wireless network infrastructure. The role involves troubleshooting, maintenance, incident response, preventive maintenance, implementation activities, vendor coordination, and support for large-scale wireless environments operating in a 24/7 environment.

Job Responsibilities

• Support day-to-day operations of wireless infrastructure including Cisco Wireless solutions, Aruba solutions, switches, firewalls, captive portals, and authentication systems.
• Perform troubleshooting for Wireless connectivity issues, DNS, DHCP, captive portal access, OTP login issues, VLAN routing, authentication failures, and internet access problems.
• Manage service technical escalations and support major incident troubleshooting during service disruptions.
• Support preventive maintenance, firmware upgrades, patching, and technology refresh activities for wireless and network infrastructure.
• Support WLC upgrade activities including Access Point image updates, failover testing, rollback planning, and validation activities.
• Work closely with vendor TAC such as Cisco TAC and Aruba TAC for issue analysis and problem resolution.
• Perform root cause analysis (RCA) and prepare incident reports, technical findings, and preventive recommendations.
• Support implementation activities including Access Point deployment, switch replacement, firewall migration, SSL certificate updates, and network migrations.
• Coordinate with stakeholders, vendors, contractors, and facility management teams during maintenance and implementation activities.
• Support testing activities such as congestion testing, failover testing, WiFi roaming optimization, and POE/network validation.
• Monitor infrastructure health using tools such as Catalyst Center, AirWave, SevOne, LogicMonitor, NetAlly.
• Fluent in ITSM Incident, Change Management, Service Request platforms such as ServiceNow.
• Maintain technical documentation including install plans, diagrams, inventory records, validation evidence, and maintenance reports.
• Support after-office-hour maintenance windows, standby support, and emergency troubleshooting activities.
• Ensure compliance with operational governance, safety requirements, and change management procedures.

Qualifications

Diploma or Degree in Information Technology, Computer Engineering, Network Engineering, or related field. Minimum 3–5 years of hands-on experience in network and wireless infrastructure support.

Strong knowledge of: Cisco Wireless LAN Controllers (WLC), Aruba Wireless solutions, Switching and routing technologies, Firewalls and network security concepts, DNS, DHCP, VLANs, and authentication systems

Experience with monitoring and management tools such as: Cisco Catalyst Center, AirWave, SevOne, ServiceNow

Familiarity with incident management, RCA preparation, and maintenance support processes. Experience supporting enterprise or mission-critical environments is an advantage. Good troubleshooting, communication, and stakeholder coordination skills. Ability to work independently and support after-hours maintenance activities when required.

Preferred Certifications

• Cisco Certified Network Associate (CCNA)
• Cisco Certified Network Professional (CCNP)
• Aruba Certified Mobility Associate/Professional
• ITIL Foundation Certification

Work Arrangement

Onsite support role. May require standby support, shift work, and after-office-hour maintenance activities depending on operational requirements.