[Skip to main content](#main-content) [OpenNash Jobs](https://jobs.opennash.com/) [Hiring report](/reports/hiring/) · [All Tata Consultancy Services jobs](https://jobs.opennash.com/companies/tata-consultancy-services/) · [Search jobs](/search/) Tata Consultancy Services · Chennai # Network Security/ Data Security L3 Chennai Data & Analytics Last seen on Tata Consultancy Services’s official careers site on August 1, 2026; it may have closed since. [Apply on Tata Consultancy Services’s careers site →](https://ibegin.tcsapps.com/candidate/next/en-IN/jobs/415427J) [OpenNash Jobs](https://jobs.opennash.com/) / [Tata Consultancy Services](https://jobs.opennash.com/companies/tata-consultancy-services/) / Network Security/ Data Security L3 ## Job description - Routing and switching on expertise level - Cisco Switch 2k,5k 7k 9k. Juniper switches ### Firewalls - checkpoint, Palo Alto, FortiGate SDWAN, SonicWALL - F5 LTM/GTM, Citrix Riverbed WLC and Access points. - Infoblox DDI - Demonstrable experience in LAN/WAN, MPLS, QOS, multicast and core networking discipline, including advanced routing protocols, BGP, OSPF and IP converged networks - Proficient OSI layer 1-7 troubleshooting. Ability to analyze, trace and understand a Packet along a transaction lifecycle end-to-end. - Circuit, Vendor, Partner relationship and tracking experiencing. - 5 - 8 years of experience in an enterprise level Network engineering role, which includes network administration experience with Cisco, juniper Fortinet, F5, Checkpoint, Palo Alto. ### Working experience with next generation architecture - private/public/hybrid cloud, containers and hyper-converged infrastructure. - Knowledge of network domain administration, platforms and principles, to include route/switch protocols, WAN/LAN, wireless networking, datacenter, high-availability design, Application Delivery Controller, Web Application Firewall, Domain Name Service and IP management, Cloud Platforms, Denial of Service Protection, Data Analytics and Network Monitoring.