Network & Security Architect (M/F)

Who are we?

Artemys, a player in digital transformation, is a human-sized company with over 30 years of experience, composed of several entities, each specializing in its field (System, data, networks/security…).

What truly distinguishes us? It is not saying that we value our employees, it is showing it every day. At Artemys, the human element is at the heart of everything we do.

Our values, concrete and lived daily:

• Conviviality: working in a good atmosphere changes everything
• Proximity: every team member has their place and their voice
• Listening: your ideas matter as much as your work

Arcatem, located in the 10th arrondissement, is an entity specializing in Security and Networks.

With 17 years of expertise, it joined the Group in 2017. It supports major clients based in Ile-de-France in their projects and offers architecture, technical expertise, and N3 engineering services to major players in various business sectors.

It is within this entity that a close-knit team operates alongside employees, composed of a technical director, an HR Manager, and a director, Mr. Boris Gunther, who has been present since the beginning of the adventure.

Recognized for its technical rigor, its high level of certification, and its human values, it is today a key player in leading solutions such as Cisco, Fortinet, Palo Alto, Check Point, F5, as well as cloud solutions AZURE and AWS.

Your mission (if you accept it):

As part of the infrastructure evolution for our major client in the media sector, we are looking for a Senior Network & Security Architect to work on a strategic project involving the implementation of a new architecture.

You will specifically intervene to:

• Audit the existing DMZ and Internet architecture and identify its strengths, weaknesses, and areas for improvement
• Define and design the target architecture in connection with resilience, security, and high availability challenges
• Support the Project Manager in defining the migration strategy
• Participate in the choice of solutions and their sizing
• Support the purchasing and provisioning phases of technical components
• Lead or contribute directly to the implementation of the new infrastructure
• Secure the migration, acceptance testing, and operational deployment phases
• Occasionally provide your expertise on other technical projects of the IT Engineering team, particularly in media, radio, and TV environments

The playground?

• Design and migration of DMZ architectures
• Internet interconnection and BGP multihoming
• Design of high availability and inter-site architectures
• Routing, Switching, NAT, and network segmentation
• Analysis, rationalization, and cleanup of existing configurations
• Cisco Catalyst, Nexus Spine & Leaf, NDFC
• Palo Alto
• F5
• Barracuda
• Firewall, Load Balancer, and Reverse Proxy
• Network & Security Troubleshooting
• Drafting of HLD, LLD, DAT, DEX, and acceptance test plans

The profile we are looking for:

• You have at least 12 years of experience in Network & Security infrastructures
• You have solid experience in Network & Security architecture design
• You have already led projects for the creation, redesign, or migration of DMZ
• You master Internet interconnection issues, particularly BGP multihoming
• You are comfortable with both design and implementation, operations, and troubleshooting
• You have experience with major clients and in critical environments
• You have a good level of technical English, particularly for communicating with vendor support
• You demonstrate rigor, autonomy, agility, and proactivity
• You have excellent interpersonal skills and very good writing skills
• Proficiency in Jira is a plus

The process to join us: simple and clear!

1. HR Exchange: We discuss your motivations and alignment with our values (promise, no robotization here).
2. Operational Exchange: I propose your candidacy to the account referent (Sales, SDM, coordinator…) of the client account, who then speaks with you to validate your fit with the need.
3. Mission Proposal: If everything fits, we propose your CV to our client!

Mission conditions:

Status: Independent / Freelance Location: Issy-les-Moulineaux Start date: November 2026 Duration: 1 year TJM: Between €650 and €700 excl. tax / day depending on your expertise

Welcome to the ARTEMYS adventure

With us, every talent counts. Regardless of your age, origin, identity, religion, or orientation: what interests us is you and what you have to bring. We are committed to responding to all applications within 72 hours, because we know how stressful waiting can be.

And here, inclusion is not just a word: all our positions are open to people with disabilities, and we do everything we can to create an environment where everyone can thrive.

Ready, set, apply!