We are seeking an experienced L3 Network Engineer with strong expertise in enterprise network infrastructure, troubleshooting, and network security. The ideal candidate will have hands-on experience with switching, routing, firewalls, load balancers, NAC, SD-WAN, and Azure networking, and be able to handle complex L3 network issues and escalations.
Key Responsibilities
Design, implement, configure, and troubleshoot L3 enterprise network infrastructure.
Provide L3 support for complex network incidents, problems, and escalations.
Configure and troubleshoot switching and routing protocols, including VLAN, STP, OSPF, BGP, and related technologies.
Manage and troubleshoot firewalls, security policies, VPNs, NAT, and network security issues.
Manage and troubleshoot load balancers, including configuration, traffic management, and health checks.
Implement and support Network Access Control (NAC) solutions, and troubleshoot authentication and access issues.
Manage and troubleshoot SD-WAN environments, including connectivity, policies, routing, and performance issues.
Manage and troubleshoot Azure networking, including VNets, subnets, NSGs, routing, VPN/ExpressRoute, and connectivity between on-premises and Azure environments.
Perform root-cause analysis for complex network outages and recurring issues.
Monitor network performance, capacity, availability, and security.
Participate in network changes, upgrades, migrations, and infrastructure improvement projects.
Coordinate with security, cloud, application, and infrastructure teams to resolve cross-functional issues.
Maintain network documentation, configurations, diagrams, and troubleshooting procedures.
Mentor L1/L2 network engineers and provide technical guidance on complex issues.
Required Technical Skills
Strong hands-on experience in switching and routing.
Good knowledge of TCP/IP, VLAN, STP, OSPF, BGP, DHCP, DNS, NAT, and VPN.
Strong experience with enterprise firewalls.
Hands-on experience with load balancers.
Experience with NAC / Network Access Control solutions.
Strong understanding of and hands-on experience with SD-WAN technologies.
Good experience with Microsoft Azure networking.
Experience troubleshooting on-premises, cloud, and hybrid network environments.
Strong understanding of network security principles.
Excellent troubleshooting, analytical, and problem-solving skills.
Preferred Qualifications
Experience with network technologies or products from vendors such as Cisco, Fortinet, Palo Alto, F5, Aruba, VMware/VeloCloud, or equivalent.
Relevant certifications such as CCNP, Azure Network Engineer Associate, PCNSE, NSE/FCP, or equivalent are an advantage.
Experience
9–12 years of overall experience in network engineering, with significant expertise in L3 network infrastructure support.
Demonstrated hands-on experience across core network domains, including routing, switching, firewalls, load balancers, NAC, SD-WAN, and Azure.
Soft Skills
Strong communication and stakeholder management skills.
Ability to work independently and handle critical production issues.
Strong ownership and incident management skills.
Ability to work in a 24x7 support environment, including rotational shifts or on-call support, if required.
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