We are seeking a Lead/Senior Security System Engineer to design, implement, and operate secure, compliant network segmentation between regional environments and Global networks, using a standardised control stack of Check Point Security Gateways, Palo Alto Networks next-generation firewalls, Zscaler Internet Access (ZIA), Zscaler Private Access (ZPA), and Cloudflare for DDoS mitigation, WAF, and application protection. This role blends architecture, hands-on engineering, automation, and L3/L4 operational leadership to deliver policy-driven connectivity under strict regulatory and operational requirements.

Responsibilities

- Define trust zones, routing boundaries, and inter-zone controls for regional and Global Network, covering north-south and east-west paths, micro-segmentation for sensitive tiers, and explicit cross-border allow-lists
- Produce HLD/LLD, threat models, and control mappings aligned to internal standards and regional regulation to enable secure communication
- Design and operate dual-vendor firewall perimeters, with clear control allocation, HA/cluster design, deterministic failover, NAT domain strategy, and SSL/TLS inspection governance tuned for jurisdiction
- Engineer ZIA for identity-aware egress controls, SSL inspection with jurisdiction-aware bypasses, inline CASB/DLP, and sanctioned SaaS governance
- Implement ZPA for per-application zero-trust access, with connector placement, posture checks, conditional access, and app segmentation replacing legacy VPN where feasible
- Design and deliver Site-to-Site VPN, Cloud Interconnect/Partner Interconnect equivalents, and dual-tunnel HA per site with BGP for failover between on-prem and hub VPC
- Deploy Cloudflare Magic Transit/Magic WAN, WAF Management, and rate limiting for internet-facing services,



with layered defence integration with on-prem perimeters
- Engineer SD-WAN/MPLS/SASE paths with policy-based routing, strong encryption, and defined key custody/rotation by jurisdiction
- Translate regulatory and internal control requirements into enforceable technical controls for logging, data residency, TLS inspection scope, and lawful intercept considerations
- Normalise telemetry from security platforms into SIEM with regional data handling rules, and build detections for cross-border anomalies, DDoS events, and policy drift
- Lead L3/L4 incidents, coordinate issue containment, and drive RCAs with corrective actions codified
- Manage firewall, Zscaler, and Cloudflare policy through automation tools and vendor APIs, with CI/CD implementation including policy linting, unit tests, and path simulation

Requirements

- 6-15 years of overall IT experience, with a robust background in network security architecture and engineering
- Expertise in Check Point Security Gateways, Palo Alto Networks next-generation firewalls, and firewall cluster/HA design
- Proficiency in Zscaler Internet Access and Zscaler Private Access for zero-trust and identity-aware access control
- Knowledge of Cloudflare Magic Transit, Magic WAN, and WAF for DDoS mitigation and application protection
- Familiarity with cloud hybrid connectivity, including Site-to-Site VPN, Cloud Interconnect, and BGP routing
- Understanding of SD-WAN, MPLS, and SASE architectures with policy-based routing and strong encryption protocols
- Skills in Microsoft Sentinel and SIEM platforms for telemetry normalisation, detection engineering, and incident response
- Competency in automation and policy-as-code using Terraform, Ansible, and vendor REST APIs
- Qualifications in regulatory compliance and audit readiness, including control matrices and CIS Benchmarks

📌 Lead/Senior Security System Engineer - Network Cloud (Chennai)
🏢 EPAM Systems
📍 Chennai