{"id":2704317,"url":"https://alion.io/job/3i-infotech-senior-engineer-network-security","title":"Senior 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":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Chennai, 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Platform","optional":false},{"name":"SIEM","optional":false},{"name":"Splunk","optional":false},{"name":"TCP/IP","optional":false},{"name":"VPN","optional":false},{"name":"Wireshark","optional":false}],"status":"live","first_seen_at":"2026-10-16T12:08:04Z","employer_posted_date":"2026-10-16","last_verified_at":"2026-10-16T21:28:51Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"Network Security Engineer - Job Description\nJob Title: Network Security Engineer\nJob Summary: A Network Security Engineer is responsible for designing, implementing, managing, and monitoring an organization's network security infrastructure to protect systems, data, and network resources from cyber threats, unauthorized access, and security breaches.\nKey Responsibilities\nDesign, implement, and maintain network security solutions such as firewalls, VPNs, IDS/IPS, and web application firewalls.\nMonitor network traffic and security events using SIEM tools.\nPerform vulnerability assessments and security audits.\nInvestigate and respond to security incidents and breaches.\nConfigure and manage security policies, access controls, and network segmentation.\nEnsure compliance with organizational security standards and regulatory requirements.\nConduct risk assessments and recommend mitigation strategies.\nManage endpoint and perimeter security technologies.\nCollaborate with IT, infrastructure, and application teams to strengthen security posture.\nDevelop and maintain network security documentation, procedures, and standards.\nStay updated on emerging cybersecurity threats, vulnerabilities, and industry best practices.\nRequired Skills\nTechnical Skills\nStrong knowledge of TCP/IP, DNS, DHCP, Routing, and Switching.\nExperience with Firewalls (Cisco ASA, Palo Alto, Check Point, Fortinet, etc.).\nHands-on experience with IDS/IPS, NAC, VPN, Proxy, and WAF solutions.\nKnowledge of SIEM platforms such as Splunk, QRadar, Sentinel, or ArcSight.\nUnderstanding of network protocols and packet analysis tools (Wireshark).\nFamiliarity with cloud security (Azure, AWS, Google Cloud).\nKnowledge of vulnerability management tools such as Nessus, Qualys, or Rapid7.\nExperience with security frameworks such as NIST, ISO 27001, and CIS Controls.\nSoft Skills\nStrong analytical and problem-solving abilities.\nExcellent communication and documentation skills.\nIncident response and troubleshooting expertise.\nAbility to work under pressure during security incidents.\nTeam collaboration and stakeholder management.","description_format":"text","description_chars":2100,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Network Security","IT Outsourcing 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