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 devices

.

- Minimum

3 years of experience in a Data Center setting

.

- 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

.

📌 Network Engineer (Mumbai)
🏢 MarbleX
📍 Mumbai