Chennai, Tamil Nadu
Job Summary
Job Summary
We are hiring a senior L3 Network Security Engineer / SME with deep expertise in Firewall technologies (any 2 mandatory) and strong knowledge of Zscaler (ZIA/ZPA), MDO 365, and WAF (Cloudflare) .
The role involves handling critical escalations, solution design, advanced troubleshooting, and security governance , along with mentoring L2 teams.
Key Responsibilities
Key Responsibilities
Handle P1 / P2 incidents and escalations end-to-end
Perform deep RCA and preventive improvements
Design:
Firewall architecture
Zscaler Zero Trust setup
Email & WAF security posture
Lead:
Firewall migrations, upgrades, deployments
Drive:
Policy optimization, governance, compliance
Mentor L2 resources
Participate in customer technical discussions and solutionin
Skill Requirements
Firewall (Meraki / Palo Alto / Fortigate)
Advanced configuration:
Policy optimization, NAT (complex/U-Turn)
Architecture:
HA setups, multi-site design
Troubleshooting:
Deep packet analysis
Routing issues (BGP, OSPF)
Tools:
Panorama / FortiManager / Meraki
Migration:
Vendor-to-vendor firewall migration
Governance:
Policy review, audit compliance
Zscaler (ZIA / ZPA – Advanced)
ZIA:
Advanced policy tuning (DLP, SSL inspection)
ZPA:
Zero Trust architecture design
App segmentation
Client Connector:
Deployment strategy & troubleshooting
Authentication:
Azure AD, SAML, MFA troubleshooting
Advanced troubleshooting:
PAC/GRE/IPsec issues
Integration:
SIEM, endpoint, identity tools
Strong understanding of:
SASE & Zero Trust architecture
MDO 365 (Advanced Email Security)
Threat analysis:
Phishing, spoofing, impersonation
Defender tools:
Threat Explorer, hunting
Incident response:
Email header analysis
Security improvements:
Secure score optimization
Automation:
Logic Apps / SOAR
Governance:
SPF, DKIM, DMARC implementation
WAF – Cloudflare (Advanced)
Custom rule creation and tuning
OWASP protection optimization
Bot mitigation and API security
False positive reduction
SSL/TLS management
Attack mitigation (SQLi, XSS)
SIEM/log integration
DDoS mitigation strategies
Good to Have
SASE / Zero Trust architecture
Cloud security (Azure / AWS)
Automation (Python / Terraform)
Large enterprise/SOC experience
Certifications
Palo Alto PCNSE
Fortinet NSE 4–7
Meraki Certifications
Zscaler ZCCP
Microsoft SC-200 / MS-500
Soft Skills
Strong stakeholder and customer management
Ability to lead technical discussions
Mentorship & leadership skills
Problem-solving and ownership mindset
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