Contract

Châtillon, France | Posted on 04/12/2025

Start Date: Immediately Location: Ile de France (92); hybrid (on-site presence required)Languages: Fluent French and professional English mandatory

Job Description

Looking for a Network & Security Architect to design, evolve, and govern network architectures across a large hybrid environment (datacenters, 3,500+ remote sites, cloud, telecom operators). The role is central to ensuring consistency, security, performance, and modernization of the network and security foundation.

Key Responsibilities:

• Design and document end-to-end network/telecom architectures: LAN/WAN, VPN, SD-WAN, cloud networking, DMZ, IP telephony.
• Ensure alignment with internal standards and security, availability, and resilience requirements.
• Provide expert guidance to technical and project teams on technology choices, risks, and migration strategies.
• Drive standardization, automation, and industrialization of network solutions.
• Participate in Architecture Boards / Design Authority and maintain the technical reference repository.
• Technical recommendations and decision notes.
• Design Authority presentations.
• Risk and progress reporting.

Short-Term Priorities:

• Produce a Secure SD-WAN RFP for ~3,500 sites.
• Finalize the DMZ / exposure network architecture after deployment of a new intranet fabric.

Requirements

Must-Have Skills & Experience:

• Proven experience as Network & Security Architect in large multi-site enterprise environments.
• Strong expertise in routing, switching, firewalling, VPN, SD-WAN, VLANs, load balancing, and hybrid/cloud connectivity.
• Solid network cybersecurity background (segmentation, DMZ design, secure access, resilience).
• Excellent architecture documentation and communication skills.

Nice-to-Have / Tools:

Soft Skills:

• Technical leadership, autonomy, rigor.
• Strong stakeholder management and cross-team communication.
• Ability to run workshops with vendors and internal engineering teams.