Castino Chelladurai
Network Security Engineer at Safran | NGFW | WAF | ADC | Cloud | AWS | Zscaler | Linux | AI
- Role
- Network Security Administrator at Safran
- Location
- Mumbai, MH, IN
- LinkedIn followers
- 500 followers
About Castino Chelladurai
Senior Network Security Engineer with 5+ years of experience securing enterprise, data centre, and cloud environments. Strong background in multi-vendor firewall operations, Zero Trust implementations, and large-scale network security transformations.Currently at Safran India, I manage and support a global security estate including Palo Alto, Fortinet, Cisco Firepower, and Forcepoint NGFWs. I have led firmware upgrades for 600+ Palo Alto firewalls, migrated legacy VPN environments to Zscaler ZPA, and executed enterprise proxy transitions to Zscaler ZIA. My role also includes F5 BIG-IP (LTM/GTM) and WAF support, MPLS to Cisco SD-WAN migrations, and Tier-3 incident ownership with deep Root Cause Analysis.Experienced in firewall governance, audit readiness, cloud connectivity (AWS), and mentoring engineers in enterprise security operations. I am focused on delivering secure, resilient, and scalable network architectures aligned with business and compliance requirements.
Experience
Network Security Administrator
Jul 2023 — Present · Mumbai, IN
Administered a multi-vendor security stack, including Palo Alto, Fortinet (FortiGate), Cisco Firepower, and Forcepoint Next-Generation Firewalls (NGFW).• Managed Application Delivery Controllers (ADC) using F5 BIG-IP (LTM/GTM) and secured web traffic via Ubika WAF application standardization.• Orchestrated a massive firmware lifecycle campaign, successfully upgrading 600+ Palo Alto Firewalls to ensure compliance and vulnerability remediation.• Implemented Zero Trust Network Access (ZTNA) and Secure Access Service Edge (SASE) solutions, migrating legacy F5 APM environments to Zscaler ZPA.• Optimized web security and proxy services by leading the migration from Skyhigh/Trellix to Zscaler Internet Access (ZIA).• SD-WAN & Routing Excellence: Directed the migration from traditional MPLS to Cisco SD-WAN (Viptela), optimizing branch connectivity and reducing operational costs.• Security Governance: Led the standardization of firewall rules and objects, reducing technical debt and improving audit readiness through policy cleanup and optimization.• Tier 3 Incident Escalation: Acted as a Subject Matter Expert (SME) within the escalation team, resolving critical, high-business-impact outages and performing deep-dive Root Cause Analysis (RCA).• Providing training: Educating new-coming employees on best security practices
Education
SIES College of Arts, Science & Commerce SION(W)
Bachelor of Science - BS, Information Technology
2016 — 2019
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