L3 Network & Security Engineer

L3 Network & Security Engineer

SGT University | Gurugram, Haryana | Full-Time

Job Summary:

SGT University is looking for an experienced L3 Network & Security Engineer with 58 years of hands-on experience in managing and troubleshooting large-scale enterprise/campus network infrastructure.

The role will be responsible for L3 networking, firewall, wireless, VPN, network security, monitoring and incident management in a high-availability environment.

The ideal candidate should have strong practical exposure to Ruckus ICX L3 Switching, Sophos XGS Firewall, Ruckus Wireless, Cisco Meraki, VPN, Point-to-Point Wireless and EDR/XDR solutions.

Key Responsibilities :

• Manage and troubleshoot large-scale enterprise/campus networks, including Core, Distribution and Access layers.
• Manage multi-building network infrastructure, WAN/Internet connectivity and high-availability network environments.
• Configure and troubleshoot VLAN, Inter-VLAN Routing, Static Routing, OSPF, DHCP, DNS, ARP, STP/RSTP and LACP.
• Handle complex L2/L3 issues including routing problems, packet loss, latency, network outages and performance degradation.
• Manage Ruckus ICX L3 switches, including configuration, upgrades, backups and troubleshooting.
• Configure and manage Sophos XGS Firewall, including firewall policies, NAT, VLAN interfaces, routing, IPS, web filtering and application control.
• Configure and troubleshoot Site-to-Site IPsec VPN and Remote Access/SSL VPN, including Phase 1/Phase 2 connectivity issues.
• Manage Ruckus Wireless Controllers and Access Points, including SSIDs, WLANs, VLAN mapping, authentication, roaming and RF troubleshooting.
• Manage Cisco Meraki Dashboard, switches and wireless access points.
• Manage and troubleshoot Point-to-Point wireless links, including signal strength, SNR, interference, throughput and link stability.
• Monitor network and security infrastructure using NMS and monitoring tools.
• Handle L3 escalations, critical incidents, RCA and network performance issues.
• Support Enterprise Antivirus, EDR/XDR and endpoint security solutions.
• Coordinate with OEMs, ISPs and technology vendors for infrastructure and security issues.
• Maintain network diagrams, configuration documentation, SOPs and operational records.
• Follow ITIL-based Incident, Problem and Change Management processes.
• Support a 247 mission-critical IT environment with minimum network downtime.

Required Technical Skills

Must Have:

• Enterprise/Campus Network Infrastructure
• Ruckus ICX L3 Switching
• Sophos XGS Firewall
• Ruckus Wireless Controller & AP
• Cisco Meraki
• Site-to-Site IPsec VPN
• Remote Access / SSL VPN
• Point-to-Point Wireless Connectivity
• VLAN, Routing & Switching
• OSPF & Static Routing
• STP/RSTP & LACP
• DHCP, DNS, ARP & TCP/IP
• 1G/10G Networking and SFP/SFP+
• Network Monitoring & L3 Troubleshooting
• Enterprise Antivirus / EDR / XDR

Qualifications:

• Bachelor's degree/diploma in Computer Science, IT, Electronics or a related field.
• 5 to 8 years of relevant hands-on experience in enterprise networking and security.
• CCNA Mandatory.
• CCNP Routing & Switching / CCNP Enterprise – Preferred.
• Sophos, Ruckus, Cisco Meraki or Cybersecurity certifications will be an added advantage.

Desired Candidate Profile :

• Strong hands-on L3 networking and troubleshooting capability.
• Experience managing high-density enterprise/campus environments.
• Strong analytical and problem-solving skills.
• Good understanding of network security and secure connectivity.
• Ability to independently handle critical incidents and L3 escalations.
• Good communication, documentation and vendor-management skills.
• Willingness to support 247 critical network operations when required.