Job SummaryWe are looking for an experienced L3 Network Engineer to manage, troubleshoot, and support enterprise network and security infrastructure. The role involves working with network devices, firewalls, data center connectivity, customers, service providers, and vendor support teams.
Key Responsibilities• Install, configure, maintain, and troubleshoot network and security equipment and services.
• Perform L3 troubleshooting of LAN, WAN, Firewall, VPN, and network connectivity issues.
• Monitor and ensure network availability, performance, and security.
• Own and resolve network/connectivity issues and coordinate with relevant stakeholders.
• Support network design for new projects and prepare technical specifications for RFPs.
• Independently engage with customers to establish and troubleshoot network connectivity.
• Coordinate with service providers, vendors, and vendor TAC teams for issue resolution and root-cause analysis.
• Maintain network device connectivity across data center and banking environments.

Required Skills• Robust understanding of OSI Model, Ethernet, NAT,



IP Addressing, and TCP/IP.
• Practical experience implementing and administering TCP/IP-based networks.
• Advanced knowledge of IPS, IDS, and UTM security devices.
• Minimum 3 years of experience in a Data Center environment.
• Strong expertise in BGP (mandatory) along with OSPF, HSRP, and VRRP.
• Hands-on experience with one or more of Juniper, Cisco, Check Point, Fortinet, ACI-SDN, or Radware devices.
• Experience with STP, VLAN, SVI, and LACP.
• Experience with SD-WAN, particularly Fortigate and Aruba.
• Knowledge of GRE, P-VPN, P-NAT, P-Routing, and Firewall Clustering.
• Good understanding of TCP, UDP, and IPv6.
• Knowledge of IOS upgrades, RADIUS, TACACS/TACACS+, NMS, SYSLOG, and SNMP.
• Basic knowledge of FTP server communication/connectivity.
• 4–5 years of hands-on experience with Juniper/Cisco/Mellanox/Dell/Arista switches, Cisco routers, and firewalls such as Cisco ASA, Juniper,

📌 Network Engineer (Mumbai)
🏢 MarbleX
📍 Mumbai