Senior Network Security Engineer

We’re hiring a Senior Network Security Engineer to build, secure, and evolve a global enterprise network.

Your mission: strengthen the perimeter and application delivery layers—designing resilient, high-performing infrastructures across firewalling, proxy, DNS, and load balancing domains.

Mission Objectives

• Design and implement new network security and traffic management solutions across global sites.
• Modernise and standardise firewall, proxy, and load balancing architectures for scale and resilience.
• Engineer DNS and application traffic flows to improve latency, reliability, and visibility.
• Conduct deep-dive analysis of traffic paths (DNS → F5 → Firewall → Server) to eliminate bottlenecks and single points of failure.
• Review and implement changes under CAB discipline, ensuring stability and rollback readiness.
• Partner with Security, Platform, and Application teams to deliver end-to-end service integrity.
• Produce technical standards and runbooks for global rollout and support transition.

Technical Environment

• Firewalls: Palo Alto, Fortinet, Check Point, Cisco ASA
• Load Balancing: F5 LTM/GTM (HA, GSLB, health checks, persistence)
• DNS & Proxy: Infoblox, Bluecoat, Zscaler or equivalent enterprise stack
• Routing/Switching: Cisco Catalyst, Nexus (OSPF, BGP, VRF)
• Monitoring & Tooling: ServiceNow, Zabbix, Centreon, Nagios

Profile

• 7+ years’ experience in network & security engineering within large-scale production environments.
• Strong expertise in firewall, proxy, DNS, and load balancing configuration and lifecycle management.
• Proven ability to design and implement resilient network security architectures.
• Excellent troubleshooting and communication skills—comfortable working across teams and under pressure.