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 robust 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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📌 Track Manager (Support & Operations) (India)
🏢 HCLTech
📍 India