Job Summary
Job Description – Senior Network Security Engineer (Level 3) Skill: Firewall / Email Security / WAF / Zscaler Tool: Cisco Meraki / Palo Alto / Fortigate / MDO / Cloudflare / ZIA, ZPA Experience: 7–12+ Years Location: Chennai / Noida 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 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 solutioning Required Skills 🔹 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 arch
Key Responsibilities
- 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
Skill Requirements
Job Description – Senior Network Security Engineer (Level 3) Skill: Firewall / Email Security / WAF / Zscaler Tool: Cisco Meraki / Palo Alto / Fortigate / MDO / Cloudflare / ZIA, ZPA Experience: 7–12+ Years Location: Chennai / Noida 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 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 solutioning Required Skills 🔹 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 arch