{"id":2843103,"url":"https://alion.io/job/3i-infotech-lead-engineer-network-security","title":"Lead Engineer - Network Security","company":{"id":180701,"name":"3i Infotech","domain":"3i-infotech.com","url":"https://alion.io/company/3i-infotech","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Career site","truth_index":null},"role":"Networking","role_family":"Networking","seniority":"lead","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Navi Mumbai, India"],"countries":["IN"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":16000,"max_usd":42000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":184},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"BGP","optional":false},{"name":"DHCP","optional":false},{"name":"DNS","optional":false},{"name":"ITIL","optional":false},{"name":"Nagios","optional":false},{"name":"OSPF","optional":false},{"name":"Sophos","optional":false},{"name":"TCP/IP","optional":false},{"name":"VPN","optional":false},{"name":"Wireshark","optional":false}],"status":"live","first_seen_at":"2026-10-19T09:55:01Z","employer_posted_date":"2026-10-19","last_verified_at":"2026-10-22T01:31:55Z","board_verified":true,"closed_at":null,"days_open":2,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":2},"description":"Job Summary\nWe are seeking a skilled and proactive Network Security Engineer to design, implement, manage, and secure enterprise network infrastructure. The ideal candidate should possess strong expertise in network administration, routing & switching, firewall management, datacenter networking, and network security technologies. The role requires troubleshooting complex network issues, ensuring network availability, and implementing security best practices across the organization.\nKey Responsibilities\nDesign, configure, monitor, and maintain enterprise network infrastructure.\nManage and support routers, switches, firewalls, VPNs, and WAN/LAN environments.\nConfigure and troubleshoot routing protocols such as OSPF, BGP, EIGRP, and static routing.\nAdminister and secure network security devices including Palo Alto, Fortinet, Check Point, Cisco ASA/Firepower, or similar technologies.\nImplement network security policies, access controls, IDS/IPS, and segmentation strategies.\nMonitor network performance, identify bottlenecks, and perform capacity planning.\nSupport datacenter network operations including core switching, redundancy, and high availability.\nPerform firewall rule reviews, security audits, and vulnerability remediation activities.\nTroubleshoot Layer 2 and Layer 3 networking issues.\nCollaborate with security, server, cloud, and infrastructure teams to support business operations.\nPrepare network documentation, architecture diagrams, SOPs, and incident reports.\nParticipate in incident response and root cause analysis for network/security incidents.\nEnsure compliance with ITIL processes including Incident, Change, and Problem Management.\nRequired Technical Skills\nNetworking\nTCP/IP, DNS, DHCP, VLANs, STP, NAT\nSwitching & Routing\nOSPF, BGP, EIGRP\nWAN/LAN Management\nVPN Technologies (IPSec, SSL VPN)\nSecurity\nNetwork Security Architecture\nFirewall Administration\nIDS/IPS Solutions\nNetwork Access Control (NAC)\nSecurity Hardening & Policy Management\nFirewall Technologies (Any)\nPalo Alto\nFortinet\nCisco ASA / Firepower\nCheck Point\nSophos\nDatacenter Technologies\nCisco Nexus Switches\nDatacenter Networking\nHigh Availability Architecture\nDisaster Recovery Planning\nMonitoring Tools\nSolarWinds\nPRTG\nNagios\nManageEngine\nWireshark\nRequired Qualifications\nBachelor's Degree in Computer Science, Information Technology, Electronics, or related field.\nStrong understanding of network and security concepts.\nExperience managing enterprise-level network infrastructure.\nKnowledge of ITIL processes and best practices.\nPreferred Certifications\nCCNA / CCNP (Routing & Switching / Enterprise)\nCisco Security Certifications\nFortinet NSE\nPalo Alto PCNSA / PCNSE\nITIL Foundation\nCompTIA Security+\nCEH (Preferred)","description_format":"text","description_chars":2725,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Network Security","IT Outsourcing & Dedicated Teams","Business Process Outsourcing (BPO)","Cloud Consulting & 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