Network Security Engineer

3i Infotech Limited; Chennai District; On-site; INR 900,000 - 1,300,000; Full time

Job summary

3i Infotech Limited in Chennai invites a Network Security Engineer to design, implement, and manage the organization's security infrastructure, protecting systems and data from cyber threats.

The role focuses on configuring firewalls, VPNs, IDS/IPS, and WAFs, monitoring with SIEM, conducting vulnerability assessments, incident response, and ensuring compliance with standards, while collaborating with IT and application teams.

Qualifications

• Experience securing enterprise networks and data centers.
• Proficient in configuring firewalls and VPNs.
• Ability to perform vulnerability assessments and audits.
• Strong written and verbal communication for incident reports.
• Experience with SIEM and log analysis.
• Knowledge of regulatory standards (NIST, ISO 27001).

Responsibilities

• Design and maintain network security solutions like firewalls, VPNs, IDS/IPS, and WAF.
• Monitor network traffic and security events using SIEM.
• Perform vulnerability assessments and security audits.
• Investigate and respond to security incidents.
• Configure and manage security policies and access controls.
• Ensure compliance with security standards and regulations.
• Conduct risk assessments and mitigation recommendations.
• Manage endpoint and perimeter security technologies.
• Collaborate with IT, infra, and app teams to improve security.
• Develop and maintain security documentation and procedures.
• Stay updated on threats, vulnerabilities, and best practices.

Skills

TCP/IP & Routing

Firewall expertise

IDS/IPS & NAC

VPN, Proxy, WAF

SIEM platforms

Wireshark & packet analysis

Cloud security

Vulnerability management

Security frameworks

Incident response

Tools

Nessus/Qualys/Rapid7 tools

Job description

Network Security Engineer - Job Description

Job Title: Network Security Engineer

Job 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.

Key Responsibilities

• Design, implement, and maintain network security solutions such as firewalls, VPNs, IDS/IPS, and web application firewalls.
• Monitor network traffic and security events using SIEM tools.
• Perform vulnerability assessments and security audits.
• Investigate and respond to security incidents and breaches.
• Configure and manage security policies, access controls, and network segmentation.
• Ensure compliance with organizational security standards and regulatory requirements.
• Conduct risk assessments and recommend mitigation strategies.
• Manage endpoint and perimeter security technologies.
• Collaborate with IT, infrastructure, and application teams to strengthen security posture.
• Develop and maintain network security documentation, procedures, and standards.
• Stay updated on emerging cybersecurity threats, vulnerabilities, and industry best practices.

Required Skills

Technical Skills

• Strong knowledge of TCP/IP, DNS, DHCP, Routing, and Switching.
• Experience with Firewalls (Cisco ASA, Palo Alto, Check Point, Fortinet, etc.).
• Hands-on experience with IDS/IPS, NAC, VPN, Proxy, and WAF solutions.
• Knowledge of SIEM platforms such as Splunk, QRadar, Sentinel, or ArcSight.
• Understanding of network protocols and packet analysis tools (Wireshark).
• Familiarity with cloud security (Azure, AWS, Google Cloud).
• Knowledge of vulnerability management tools such as Nessus, Qualys, or Rapid7.
• Experience with security frameworks such as NIST, ISO 27001, and CIS Controls.

Soft Skills

• Strong analytical and problem-solving abilities.
• Excellent communication and documentation skills.
• Incident response and troubleshooting expertise.
• Ability to work under pressure during security incidents.
• Team collaboration and stakeholder management.

Contact: [e-mail]