Network & Security Architect - freelance - hybrid - Ile de France

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.

Main Deliverables

• Architecture documents (DAT / HLD / LLD).
• 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.

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).
• Vendor knowledge: Cisco, Arista, Fortinet, Palo Alto, F5 (or equivalent).
• Excellent architecture documentation and communication skills.

Nice-to-Have / Tools

• TOGAF, ArchiMate, SAFe, LeanIX.
• Jira / Confluence, Draw.io (or Visio).

Soft Skills

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

Seniority level

Mid-Senior level

Employment type

Contract

Job function

Information Technology

Industries

IT Services and IT Consulting

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