Level 3 Network Engineer

Salary: $6,500 – $8,500 per month

Position Overview

The Senior Network Engineer is responsible for providing advanced technical support, troubleshooting, implementation, and management of enterprise network infrastructure across multiple technologies and vendors. This role serves as the Level 3 technical escalation point for complex network incidents and works closely with support teams, infrastructure units, information security teams, external vendors, and business stakeholders to maintain a stable, secure, and highly available network environment.

Key Responsibilities

Advanced Support & Troubleshooting

• Provide L3 technical support for complex network incidents escalated from Tier 1/2 operations teams.

• Troubleshoot complex issues across enterprise LAN, WAN, Internet, WLAN, VPN, routing, switching, and perimeter security environments.

• Perform detailed network analysis using logs, packet captures, routing tables, and enterprise monitoring tools.

• Lead troubleshooting efforts for major incidents and provide hands-on technical support during critical outages.

• Perform root cause analysis (RCA) and identify permanent corrective actions.

Infrastructure Administration & Management

• Provide hands-on support and administration across a diverse, multi-vendor enterprise network environment, covering:

  • Enterprise Routing & Switching: Core, distribution, and access layer platforms, data center switching, and enterprise routers.

  • Next-Generation Firewalls & Security: Enterprise firewall appliances, site-to-site/remote access VPNs, security policies, and centralized management/analysis platforms.

  • Wireless & Cloud-Managed Infrastructure: Enterprise-grade wireless LAN architectures and cloud-managed network solutions.

Routing, Switching & Connectivity

Firewall & Perimeter Security

Wireless & SD-WAN

Network Projects & Change Management

• Participate in network migration, technology refresh, site expansion, and infrastructure improvement projects.

• Perform scheduled network device upgrades, firmware updates, configuration modifications, and architecture migrations.

• Prepare detailed implementation, verification, and rollback plans.

• Conduct pre-change and post-change validation checks.

• Coordinate with internal teams, external service providers, and stakeholders during implementation windows.

• Ensure all network architecture changes are properly documented, diagrammed, and communicated.

Incident & Problem Management

• Take full ownership of complex network incidents through to successful resolution.

• Participate in Major Incident Management protocols, providing timely technical updates to stakeholders.

• Perform detailed RCA for critical, recurring, or systemic network incidents.

• Identify automation and engineering opportunities to improve network reliability and reduce incident volume.

• Maintain up-to-date technical knowledge articles, runbooks, and standard operating procedures.

Required Technical Skills

Networking Foundations

• Deep understanding of TCP/IP stack, DNS, DHCP, NAT, VLANs, STP, Quality of Service (QoS), VPN architectures, and network security principles.

• Strong hands-on configuration and troubleshooting experience with enterprise routing and switching.

• Solid working knowledge of interior and exterior routing protocols (specifically BGP and OSPF).

• Advanced troubleshooting methodology utilizing packet captures (Wireshark) and diagnostic tools.

• Experience with enterprise network monitoring, alerting, and management platforms.

Vendor Platforms

• Enterprise Routing & Switching: Experience with industry-leading enterprise routing and switching platforms (Catalyst, Nexus, or equivalent).

• Enterprise Firewalls: Experience with market-leading next-generation firewalls, VPN gateways, and security policy management.

• Wireless Solutions: Experience managing enterprise wireless controllers and access point architectures.

• Note: Experience supporting multi-vendor enterprise environments is strongly preferred.

Qualifications & Experience

• Diploma or Bachelor’s Degree in Information Technology, Computer Science, Networking, or a related discipline.

• 5 to 8+ years of professional network engineering experience, with a heavy emphasis on L3 troubleshooting and operational support.

• Proven hands-on experience supporting enterprise-grade network environments.

• Professional-level industry certifications (e.g., CCNP, JNCIP, or equivalent vendor-recognized advanced certifications) are preferred.

• Familiarity with ITIL frameworks, specifically Incident, Problem, and Change Management processes.

Interested applicants, please Email, fabianling@recruitexpress.com.sg

Fabian Ling Tuong Liing

R25129353

Recruit Express Pte Ltd

EA Licence No: 99C4599

We regret that only shortlisted candidates will be contacted.