Network Security Engineer

3 days ago


Chennai, Tamil Nadu, India Fourth Dimension Technologies Full time

Candidate Skills: Network Security Engineer

  • Good in Communication
  • Notice Period: Immediate Joiner
  • Exp: 3+ Years Relevant

Key Responsibilities:

  • Firewall Management: Configure and troubleshoot Fortinet, Palo Alto, and Cisco firewalls including policies, NAT, segmentation, routing, UTM, upgrades, migrations, and HA.

  • SD-WAN Operations: Deploy and optimize SD-WAN environments (overlays/underlays), troubleshoot routing (BGP/OSPF), tunnel issues, dual-WAN failover, SLA routing, and performance using QoS and link-health monitoring.

  • Cloud Network Security: Implement and audit AWS/GCP security controls (NSGs, firewall policies, VPC routing, peering, WAF) and resolve multi-region connectivity issues.

  • WAF Management: Perform onboarding, rule tuning, exception handling, and false-positive analysis.

  • Proxy & Zscaler: Manage Zscaler ZIA configurations, authentication methods, routing policies, and resolve complex proxy issues.

  • VPN & Secure Access: Configure and troubleshoot complex IPSec/SSL-VPN tunnels and analyze application flows for security rule creation.

  • Security Architecture Support: Assist Leads during network design, segmentation planning, and ensure compliance with ISO 27001, SOC 2, and client requirements.

  • Documentation: Prepare HLD/LLD, change documentation, and maintain Visio diagrams for firewalls, SD-WAN, and cloud networks.

Skills & Experience :

  • Hands-on experience with Fortinet/Palo Alto/Cisco firewalls.

  • Strong SD-WAN troubleshooting (overlay tunnels, routing protocols, SLA policies).

  • Knowledge of AWS/GCP network security concepts and tools.

  • Experience with VPN, Zscaler, WAF, and enterprise routing/security.

  • Good understanding of security standards and audit processes.

  • Strong documentation, analytical, and problem-solving skills.



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