L3 Network Engineer

; Job Title: Senior Network & Infrastructure Engineer / L3 Network Engineer
Experience: Minimum 5 years relevant experience
Qualification: B.E./B.Tech./MCA
Certification: CCNA/CCNP mandatory
Location: Chennai
Work Mode: On-site, MondayFriday
Working Hours: 9:30 AM 6:00 PM
Support: On-call/remote support during critical hours, holidays and extended hours as required.

;Key Responsibilities

;Manage and support enterprise network infrastructure including routers, switches and network security appliances.

;Configure, troubleshoot and maintain firewalls/security configurations , VPNs, access policies and related security infrastructure.

;Manage and troubleshoot LAN/WAN, routing and switching infrastructure.

;Provide L3 support for complex network incidents and perform root-cause analysis .

;Manage servers and infrastructure , including GIS/HEP-related server environments.

;Administer and troubleshoot SAN/NAS storage systems .

;Manage backup and recovery operations , including monitoring backup jobs and restoration activities.

;Support network infrastructure, power infrastructure, physical infrastructure and structured cabling .

;Coordinate with OEMs/vendors for hardware/software issues, warranty support and escalation.

;Perform preventive maintenance, upgrades, configuration changes and system health checks.

;Maintain network diagrams, configurations, technical documentation and operational records.

;Support disaster recovery/business continuity activities.

;Provide on-call support during critical incidents, holidays and extended working hours when required.

;Ensure high availability and reliable operation of the organizations IT infrastructure.

;Required Technical Skills

;Strong knowledge of TCP/IP, OSI model, subnetting, VLANs, routing and switching .

;Hands-on experience with Cisco routers and switches .

;Routing protocols such as OSPF, BGP, EIGRP would be advantageous.

;Strong knowledge of firewalls, security policies, VPN and network security .

;Experience with SAN/NAS storage .

;Knowledge of backup and recovery solutions .

;Server administration and troubleshooting.

;Candidate Profile

; Mandatory:

;B.E./B.Tech./MCA

;Minimum 5 years relevant experience

; CCNA/CCNP certification

;Strong enterprise networking experience

;Hands-on firewall/network security experience

;Good troubleshooting and analytical skills

; Preferred:

;Experience with Cisco / Fortinet / Palo Alto or similar technologies

;SAN/NAS administration

;Backup & disaster recovery

;Data-center infrastructure

;Server administration

;Network monitoring tools

;Experience handling L3/escalation support

;Good documentation and communication skills

;Short Recruitment JD

; We are looking for an experienced L3 Network & Infrastructure Engineer with 5+ years of experience in enterprise IT infrastructure. The candidate should possess CCNA/CCNP certification and strong hands-on experience in routing & switching, firewall/security administration, server infrastructure, SAN/NAS storage, backup & recovery and network troubleshooting. The role involves on-site infrastructure support, L3 incident resolution, preventive maintenance, vendor coordination and on-call support for critical incidents. B.E./B.Tech./MCA candidates with strong enterprise infrastructure experience are preferred.

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