L3 Network Engineer (1-year renewable) #IAC

Recruit Express Pte Ltd; Singapore; On-site; SGD 90,000 - 120,000; Full time

Job summary

Recruit Express Pte Ltd is seeking an experienced Network Engineer to deliver L3 support for complex incidents across LAN/WAN/WLAN and VPN environments in Singapore.

You will manage multi-vendor networks (Cisco, Fortinet, Palo Alto, Juniper, Meraki, UniFi), perform RCA, and drive continuous improvement with ITIL processes.

Qualifications include a diploma or degree in IT or networking and 5–8+ years of hands-on experience.

Qualifications

• 5–8+ years of network engineering experience with strong L3 troubleshooting.
• Hands-on experience with enterprise routing, switching, firewalls, and network security.
• Familiarity with multiple vendors: Cisco, Fortinet, Palo Alto, Juniper, Meraki, UniFi.
• Solid knowledge of TCP/IP, DNS, DHCP, NAT, VLAN, VPN, BGP, and OSPF.
• Experience with ITIL Incident, Problem, and Change Management.
• Relevant certifications (CCNP, JNCIP, Fortinet, Palo Alto) are advantageous.

Responsibilities

• Provide L3 support for complex network incidents escalated from L1/L2.
• Troubleshoot LAN/WAN/WLAN, VPN, routing, switching, and Internet connectivity issues.
• Lead major incident troubleshooting, perform RCA, and implement permanent fixes.
• Coordinate with vendors and internal teams; maintain network documentation.

Skills

L3 troubleshooting

Incident management

Root Cause Analysis

Technical leadership

Network monitoring

Education

Diploma or Degree in Information Technology, Computer Science, Networking, or a related discipline

Tools

Cisco

Fortinet

Palo Alto

Juniper

Meraki

UniFi

Networking hardware

Job description

Job Responsibilities

1. L3 Network Support & Incident Management

• Provide L3 support for complex network incidents escalated from L1/L2 teams.
• Troubleshoot LAN, WAN, WLAN, VPN, routing, switching, Internet connectivity, and firewall issues.
• Perform network analysis using logs, packet captures, monitoring tools, and diagnostic utilities.
• Lead major incident troubleshooting, conduct Root Cause Analysis (RCA), and implement permanent corrective actions.
• Provide technical guidance to L1/L2 engineers and ensure incidents are resolved within agreed SLAs.

2. Network Infrastructure & Security

• Manage and troubleshoot multi-vendor network environments, including Cisco, Fortinet, Palo Alto, Juniper, Cisco Meraki, and UniFi.
• Configure and support routers, switches, firewalls, wireless infrastructure, and VPN connectivity.
• Troubleshoot routing and switching protocols, including BGP, OSPF, VLAN, STP, VRF, and LACP.
• Manage firewall policies, NAT, security profiles, and high-availability configurations.
• Support wireless connectivity, authentication, performance, and SD-WAN where applicable.

3. Network Projects & Change Management

• Participate in network upgrades, migrations, refreshes, and infrastructure improvement projects.
• Prepare implementation and rollback plans and conduct pre- and post-change validation.
• Coordinate network changes with internal teams, vendors, and stakeholders.
• Maintain accurate network documentation, configurations, and troubleshooting procedures.

4. Problem Management & Continuous Improvement

• Take ownership of complex and recurring network issues through resolution.
• Perform RCA, identify preventive measures, and improve network reliability.
• Participate in major incident management and technical bridge calls.
• Support proactive network monitoring and service improvement initiatives.
• Any other ad-hoc duties as assigned by supervisor

Requirements

• Diploma or Degree in Information Technology, Computer Science, Networking, or a related discipline.
• 5–8+ years of network engineering experience, including strong L3 troubleshooting capabilities.
• Strong hands‑on experience in enterprise routing, switching, firewalls, and network security.
• Experience with multiple vendors, preferably Cisco, Fortinet, Palo Alto, Juniper, Meraki, and/or UniFi.
• Good knowledge of TCP/IP, DNS, DHCP, NAT, VLAN, VPN, BGP, and OSPF.
• Experience with network monitoring tools, packet analysis, and ITIL Incident, Problem, and Change Management.
• CCNP, JNCIP, Fortinet, Palo Alto, or equivalent certifications are advantageous.