Network Infrastructure Engineer

Alphaeus Pte Ltd; Singapore; On-site; SGD 100,000 - 150,000; Full time

Job summary

Alphaeus Pte Ltd seeks an experienced Enterprise Network Engineer to support, maintain, and improve the company’s LAN/WAN, data centre connectivity and enterprise voice systems. You will configure Cisco switches/routers, manage CUCM/CUC, and ensure reliable network performance.

The role requires hands-on Cisco expertise, strong problem-solving, and collaboration with IT teams, vendors, and contractors. A Diploma/Degree in IT or related field is essential, with 5–6 years of relevant experience.

Qualifications

• Diploma or Degree in Information Technology, Computer Science, Computer Engineering, Telecommunications or a related discipline.
• 5-6 years of relevant experience in enterprise network engineering or infrastructure support.
• Hands-on experience with Cisco switches, routers and wireless infrastructure.
• Working knowledge of LAN, WAN, wireless networking and the routing and switching technologies listed above.
• Experience in network monitoring, incident resolution, troubleshooting and change implementation.
• Working knowledge of Cisco enterprise voice systems, including CUCM, CUC, IP telephony and voice gateways.
• Understanding of network security, patching, vulnerability remediation and IT audit requirements.
• Ability to maintain accurate technical documentation and coordinate with vendors and internal stakeholders.
• Familiarity with Ekahau wireless survey tools and Fluke network testers would be an advantage.
• Strong problem-solving, communication and teamwork skills.

Responsibilities

• Operate and support LAN, WAN, wireless networks, data centre connectivity and enterprise voice systems.
• Install, configure, maintain and troubleshoot Cisco switches, routers, wireless access points and associated network equipment.
• Monitor network availability, performance and alerts, investigate incidents and implement corrective actions.
• Provide Level 1 and Level 2 support, including troubleshooting, root cause investigation and escalation to vendors or specialist teams.
• Support routing and switching technologies, including BGP, EIGRP, OSPF, VLANs, STP, ACLs and MPLS.
• Implement approved network changes, infrastructure upgrades, equipment replacements and maintenance activities.
• Coordinate network projects with internal IT teams, telecommunications providers, equipment vendors and cabling contractors.
• Conduct wireless coverage assessments and site surveys, and perform network cabling inspections and connectivity testing.
• Support Cisco Unified Communications Manager (CUCM), Cisco Unity Connection (CUC), IP phones, Cisco Jabber, Webex, voice gateways and voicemail services.
• Handle voice user provisioning, extension configuration, phone registration and moves, adds, changes and deletions (MACD).
• Troubleshoot voice service issues using call detail records, gateway logs and other diagnostic information.
• Perform preventive maintenance, configuration reviews, software and firmware upgrades, and vulnerability remediation.
• Maintain network diagrams, configuration records, asset inventories and configuration management database (CMDB) information.
• Manage incidents, service requests and change tickets within agreed service-level agreements.
• Prepare operational reports and support capacity planning, audits and service improvement activities.

Skills

Network engineering

Problem solving

Teamwork

Documentation

Education

Diploma/ Degree in IT/ CS/ CE/ Telecom

Tools

Cisco switches

Cisco routers

CUCM

CUC

Cisco Jabber

Webex

Voice gateways

Ekahau

Fluke tester

Job description

Job Summary

Support the daily operation, maintenance and improvement of enterprise network and voice infrastructure, ensuring reliable connectivity and timely resolution of service incidents.

Key Responsibilities

• Operate and support LAN, WAN, wireless networks, data centre connectivity and enterprise voice systems.
• Install, configure, maintain and troubleshoot Cisco switches, routers, wireless access points and associated network equipment.
• Monitor network availability, performance and alerts, investigate incidents and implement corrective actions.
• Provide Level 1 and Level 2 support, including troubleshooting, root cause investigation and escalation to vendors or specialist teams.
• Support routing and switching technologies, including BGP, EIGRP, OSPF, VLANs, STP, ACLs and MPLS.
• Implement approved network changes, infrastructure upgrades, equipment replacements and maintenance activities.
• Coordinate network projects with internal IT teams, telecommunications providers, equipment vendors and cabling contractors.
• Conduct wireless coverage assessments and site surveys, and perform network cabling inspections and connectivity testing.
• Support Cisco Unified Communications Manager (CUCM), Cisco Unity Connection (CUC), IP phones, Cisco Jabber, Webex, voice gateways and voicemail services.
• Handle voice user provisioning, extension configuration, phone registration and moves, adds, changes and deletions (MACD).
• Troubleshoot voice service issues using call detail records, gateway logs and other diagnostic information.
• Perform preventive maintenance, configuration reviews, software and firmware upgrades, and vulnerability remediation.
• Maintain network diagrams, configuration records, asset inventories and configuration management database (CMDB) information.
• Manage incidents, service requests and change tickets within agreed service-level agreements.
• Prepare operational reports and support capacity planning, audits and service improvement activities.

Requirements

• Diploma or Degree in Information Technology, Computer Science, Computer Engineering, Telecommunications or a related discipline.
• 5-6 years of relevant experience in enterprise network engineering or infrastructure support.
• Hands-on experience with Cisco switches, routers and wireless infrastructure.
• Working knowledge of LAN, WAN, wireless networking and the routing and switching technologies listed above.
• Experience in network monitoring, incident resolution, troubleshooting and change implementation.
• Working knowledge of Cisco enterprise voice systems, including CUCM, CUC, IP telephony and voice gateways.
• Understanding of network security, patching, vulnerability remediation and IT audit requirements.
• Ability to maintain accurate technical documentation and coordinate with vendors and internal stakeholders.
• Familiarity with Ekahau wireless survey tools and Fluke network testers would be an advantage.
• Strong problem-solving, communication and teamwork skills.