L2 Network Security Engineer_2026

Role Overview

We are hiring a Level 2 Network Engineer to join our Managed Services team as a hands-on technical escalation point. You will handle incidents and problems escalated from Level 1 Support, troubleshoot complex network and firewall issues, support infrastructure changes and tech refresh projects, and contribute to a disciplined, documentation-driven operations culture.

This role demands proven, real-world troubleshooting experience – not just configuration knowledge. You should be able to diagnose and resolve routing, switching, wireless, and firewall issues under pressure, with a structured and methodical approach.

Key Responsibilities

• Troubleshoot and resolve IP services, routing, switching, firewall, wireless, and FTTx issues escalated from the NOC and Technical Support teams.
• Diagnose connectivity issues affecting LAN/WAN, wireless, SD-WAN, and SASE environments, applying structured troubleshooting methodologies.
• Engage vendor support (TAC cases, conference calls) and drive issues to resolution within SLA targets, including coordinating with L3 engineers where required.
• Monitor network alerts, perform system diagnosis, and take corrective action proactively before customer impact.
• Provide hardware and software break-fix support for business-critical systems across retail, hospitality, healthcare, government, and financial sector customers.
• Troubleshoot issues reported by managed-service agents and deliver tech refresh projects for enterprise and government customers.

• Implement, administer, and troubleshoot network hardware including routers, switches, firewalls, and wireless access points across multi-vendor environments.
• Support network upgrades such as OLT deployments, firmware upgrades, software patches, and configuration optimisations.
• Perform firewall policy management and rule-set changes (Palo Alto, Fortinet, Cato).
• Manage enterprise wireless networks (Cisco, Aruba, Ubiquiti/UniFi, Huawei).
• Configure and troubleshoot switching and routing (Cisco, Aruba, Arista, Juniper, Huawei).
• Support SD-WAN and SASE deployments (Huawei, Palo Alto Prisma, Cato Networks).

• Handle escalated incidents and problem tickets in Jira Service Management, ensuring SLA compliance, accurate categorisation, and timely updates.
• Review, plan, and implement network changes with proper risk assessment, approval workflows, and rollback procedures.
• Validate infrastructure before and after maintenance windows; track and report incident resolutions and system performance.
• Conduct root cause analysis (RCA) for recurring or major incidents, producing actionable findings and preventive recommendations.

• Document all incident resolutions, problem investigations, configuration changes, and system changes in the knowledge base (Confluence) – this is not optional.
• Create and maintain runbooks, standard operating procedures (SOPs), and troubleshooting guides for L1 support and peer engineers.
• Maintain accurate network inventory, topology documentation, and technical specifications for all managed customer environments.
• Contribute to knowledge-sharing sessions and provide mentoring to junior engineers.

Requirements

• Minimum 3 years of hands-on experience in network operations, troubleshooting, and maintenance – preferably in an ISP, managed services, or enterprise NOC environment.
• Demonstrated real-world experience troubleshooting routing, switching, wireless, and firewall issues in production environments. We will assess this during the interview with scenario-based questions.
• Experience working in a 24/7 or on-call managed services environment with SLA-driven mincident response.

• Strong working knowledge of TCP/IP, VLANs, VPNs, BGP, OSPF, STP, and MPLS.
• Hands-on experience with at least two of the following firewall platforms: Palo Alto, Fortinet, Cato Networks.
• Hands-on experience with enterprise switching and routing from at least two of: Cisco, Aruba, Arista, Juniper, Huawei

For interested applicants, kindly send your resume in Word/PDF format to include the following in your resume including:

1. Current Salary
2. Expected Salary
3. Availability
4. Reason for leaving

Thank you for your application and we regret that only shortlisted applicants will be notified

By submitting any application or resume to us, you will be deemed to have agreed & consented to us collecting, using, retaining & disclosing your personal information to prospective employers with the services provided by us.

VU TRA MY | R25158108

RRECRUITER INT PTE. LTD. | 22C1414