Senior Firewall&Micro-Segmentation Architect (Remote), Guyancourt

We are supporting a major organisation on a strategic programme focused on strengthening network security and modernising data centre infrastructure. This is a key architect-level role within a highly complex enterprise environment. You will be working across a broad and modern technology stack including F5, VXLAN EVPN, Cisco ACI, VMware NSX, Segment Routing, and MPLS, with a strong focus on firewalling and micro-segmentation strategy.Key Responsibilities Define and design firewalling and micro-segmentation solutions aligned to business and security requirements Translate high-level security strategy into scalable technical architecture Optimise firewall configurations, performance, and overall security posture Collaborate closely with network and cyber defence teams to ensure end-to-end securityPartner with Product Owners and Product Managers on strategic decisions Support vendor engagement and continuous technology improvement Guide and support implementation teams within the Firewall squad Produce architecture documentation, diagrams, and technical presentations Contribute to operational stability, security, and ongoing supportRequired Experience Strong background as a Network / Security Architect in complex enterprise environments Deep knowledge of security architecture principles and best practices Proven ability to lead, mentor, and influence technical teams Strong stakeholder management and communication skills Technical SkillsNetwork: LAN, WAN, MPLS, VPN, switching, routing, load balancing, proxies Scripting and automation Certificate management Work pattern: 3 days onsite / 2 days remote Start: ASAP Contract: Long-term with extension potential

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