Senior Network Engineer L2: LAN/WAN & SD-WAN Expert

Two95 International Inc.; Singapore; On-site; SGD 60,000 - 80,000; Full time

Job summary

A leading IT consulting firm is seeking a Network Engineer – L2 in Singapore to manage and optimize enterprise network infrastructure. This role involves troubleshooting and supporting LAN, WAN, and SD-WAN operations, ensuring network reliability, and collaborating with cross-functional teams. The ideal candidate should have hands-on experience with networking technologies and protocols, as well as relevant certifications. This position offers a dynamic environment with room for growth and innovation.

Qualifications

• Strong hands-on experience in LAN/WAN/SD-WAN operations.
• Proficiency in routing and switching technologies.
• Experience with NAC solutions.
• Knowledge of Wi-Fi infrastructure and WLAN controllers.
• Ability to analyze packet captures for troubleshooting.
• Good understanding of firewall concepts.
• Experience with network monitoring tools.
• Solid understanding of L2/L3 protocols.
• Experience with enterprise firewalls and routers.
• Exposure to data center technologies.
• Familiarity with ITIL processes.

Responsibilities

• Perform L2-level support for LAN, WAN, and SD-WAN operations.
• Troubleshoot routing and switching issues.
• Provide 2nd-tier support for network incidents.
• Diagnose cloud connectivity issues.
• Support firewall and security infrastructure.
• Manage NAC operations.
• Ensure compliance with network security standards.
• Participate in firewall upgrades and configurations.
• Configure and troubleshoot Wi-Fi infrastructure.
• Execute network changes per ITIL processes.
• Monitor network performance using tools.
• Maintain network documentation and diagrams.
• Assist in network upgrades and migrations.
• Support modernization initiatives.

Skills

LAN/WAN/SD-WAN operations

Routing and switching technologies

NAC solutions

Wi-Fi infrastructure

Packet analysis

Network security best practices

Network monitoring tools

L2/L3 protocols

Enterprise firewalls

Data center technologies

ITIL processes

Education

CCNA

CCNP

Aruba Associate

Juniper Associate

Tools

SolarWinds

WhatsUp Gold

Job description

Network Engineer – L2

Industry Type: IT Services & Consulting

The Network L2 Engineer will be responsible for supporting, managing, and optimizing enterprise network infrastructure across LAN, WAN, and SD-WAN environments. The role involves handling advanced troubleshooting, implementing network changes, ensuring high availability, and collaborating with cross-functional teams to maintain a secure and resilient network.

Responsibilities:

· Perform L2-level support for LAN, WAN, and SD-WAN operations, ensuring network uptime, reliability, and performance.

· Troubleshoot and resolve issues related to routing and switching technologies including OSPF, BGP, EIGRP, STP, VLANs, VRRP/HSRP, and other L2/L3 protocols.

· Provide 2nd-tier support for escalated network and firewall incidents across enterprise environments.

· Diagnose and resolve cloud connectivity and network-related issues, ensuring minimum downtime and high-quality service delivery.

· Support enterprise security infrastructure including firewalls, security appliances, and NAC (Network Access Control) solutions.

· Manage NAC operations such as device onboarding, authentication, profiling, and policy enforcement.

· Ensure compliance with network security standards, configuration baselines, and audit requirements.

· Participate in firewall upgrades, rule reviews, and configuration changes.

· Configure, manage, and troubleshoot Wi-Fi infrastructure, including wireless controllers, access points, RF optimization, and end-user connectivity issues.

· Execute network changes as per ITIL processes, covering change requests, incident handling, and problem management.

· Work closely with L1 and L3 teams to ensure efficient escalation, resolution, and closure of incidents.

· Monitor network performance and health using tools such as SolarWinds, WhatsUp Gold, or similar platforms.

· Maintain updated network documentation, diagrams, configuration backups, inventory, and knowledge base articles.

· Assist in network upgrades, migrations, and technology refresh projects across firewalls, routers, core/distribution/access switches, and data center platforms.

· Support modernization initiatives involving Cisco Nexus, ACI, cloud networking, and other emerging technologies.

· Collaborate with cross-functional teams to improve network performance, scalability, and security posture.

Skill Set:

· Strong hands-on experience in LAN/WAN/SD-WAN operations.

· Proficiency in routing and switching technologies (Cisco, Aruba, Juniper preferred).

· Experience working with NAC solutions such as Cisco ISE, Aruba ClearPass, or FortiNAC.

· Knowledge of Wi-Fi infrastructure, RF behavior, WLAN controllers, and enterprise wireless deployments.

· Ability to analyze packet captures and interpret system/network logs for troubleshooting.

· Good understanding of firewall concepts and network security best practices.

· Experience with network monitoring and ticketing tools.

· Solid understanding of L2/L3 protocols (OSPF, BGP, EIGRP, STP, HSRP/VRRP, VLANs).

· Experience with enterprise firewalls, switching (core/distribution/access), and routers.

· Exposure to data center technologies including Cisco Nexus and ACI.

· Familiarity with ITIL processes for change, incident, and problem management.

Preferred Skills & Certifications:

· Strong analytical and problem-solving abilities.

· Excellent communication and documentation skills.

· Ability to work under pressure and manage multiple priorities.

· Team player with proactive attitude.

· CCNA / CCNP (Routing & Switching/Enterprise)

· Aruba Associate (ACSA/ACSA-W)

· Juniper Associate (JNCIA)