L3 Network Engineer

Wits Innovation Lab; Hyderabad; On-site; INR 900,000 - 1,500,000; Full time

Job summary

Wits Innovation Lab in Mumbai seeks an experienced L3 Network Engineer to manage, troubleshoot, and support enterprise network and security infrastructure. You will work with network devices, firewalls, data center connectivity, customers, service providers, and vendor support teams.

The role emphasizes hands-on configuration, L3 troubleshooting, and cross-team coordination to ensure network availability and security across datacenters.

Qualifications

• Extensive experience in designing and managing enterprise networks and security.
• Hands-on with data center networking and vendor equipment.
• Proven ability to troubleshoot complex network issues and coordinate with teams.

Responsibilities

• Install, configure, maintain, and troubleshoot network and security gear.
• Perform L3 troubleshooting for LAN, WAN, VPN, and connectivity issues.
• Monitor network performance and security; own issue resolution.
• Draft specifications for new projects and assist with RFPs.
• Engage with customers to diagnose connectivity problems.
• Coordinate with service providers, vendors, and TAC for root-cause analysis.
• Maintain device connectivity across data centers and banking environments.

Skills

OSI Model understanding

Ethernet & IP addressing

TCP/IP fundamentals

IPS/IDS/UTM security

Data Center operations

BGP

OSPF/HSRP/VRRP

Juniper/Cisco/Check Point

Fortinet/ACI-SDN/Radware

SD-WAN (Fortigate/Aruba)

GRE/P-VPN/P-NAT

Firewall clustering

Routing & switching (L2/L3)

Network monitoring tools

Troubleshooting skills

Customer engagement

Tools

Juniper

Cisco

Check Point

Fortinet

ACI-SDN

Radware

Mellanox/Dell/Arista switches

Cisco ASA/Firewalls

Job description

Job Title: L3 Network Engineer

Location: Mumbai

Experience: 8-10 Years

Job Summary

We 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

• Strong 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 device.
• 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, Check Point, and Fortinet.
• Working knowledge of network monitoring tools and network analyzers.
• Strong troubleshooting skills with the ability to differentiate between network, application, and system‑related issues.

Soft Skills & Work Requirements

• Strong problem‑solving and troubleshooting abilities.
• Ability to prioritize and manage multiple tasks.
• Excellent communication and interpersonal skills.
• Comfortable working with customers, vendors, and service providers.
• Willingness to learn new technologies and maintain industry knowledge.

Experience Required: 8-10 Years