Network Engineer L3

Cephas Consultancy Services Private Limited

India, Maharashtra, Mumbai | India, Karnataka, Bengaluru

On-site · Full-time

We are seeking an experienced L3 Network Engineer with strong expertise in enterprise network infrastructure, troubleshooting, and network security. The ideal candidate will possess hands-on experience across a range of technologies including Switching, Routing, Firewalls, Load Balancers, NAC, SD-WAN, and Azure networking, and be capable of handling 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/access-related 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-premise 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 & 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 and hands-on experience with SD-WAN technologies.
  • Good experience with Microsoft Azure Networking.
  • Experience troubleshooting on-premise, cloud, and hybrid network environments.
  • Strong understanding of network security principles.
  • Excellent troubleshooting, analytical, and problem-solving skills.

Preferred Qualifications

  • Experience with network technologies/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 will be an advantage.

Experience

  • 9–12 years of overall experience in Network Engineering, with significant expertise in L3 network infrastructure support.
  • Demonstrated strong 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/on-call support, if required.