Administrateur Systèmes & Réseaux H/F

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We build AI-guided interceptors to counter drones and cruise missiles, along with the software platform that powers them.

Our customers are NATO-aligned militaries and defense institutions, and our systems are regularly deployed during live exercises and operational demonstrations across Europe, the Middle East, and Asia.

Founded in 2024, we have grown to 90 people, raised over $60M, and increased revenue 40× this year.

We are now entering a new phase of international expansion, industrial scaling, fundraising, and product development.

Role & MissionAdminister and evolve Alta Ares' IT infrastructure across Windows, macOS and Linux environments, including cloud services (GCP, Scaleway).

• Maintain and secure enterprise networks, including LAN/Wi-Fi, VLANs, VPNs, DNS/DHCP, firewalls, network segmentation and 802.

• Manage identity and access systems, including RBAC, MFA, SSO, conditional access, and Zero Trust principles.

Administer endpoint and mobile device management solutions, including MDM/MAM/RMM, NinjaOne and Apple Business Manager.

Operate and improve cybersecurity tools, including EDR/XDR, vulnerability management, log monitoring and incident response.

• Ensure backup reliability, conduct restoration tests and contribute to business continuity and disaster recovery planning.

Monitor infrastructure performance, troubleshoot complex incidents and coordinate external IT service providers.

Automate recurring IT operations using PowerShell, Bash and APIs, while maintaining clear and up-to-date technical documentation.

• Collaborate with the IT Support Engineer and technical teams to strengthen IT operations, security and infrastructure scalability.

Candidate Profile3 to 5 years of experience in systems and network administration, ideally in a growing or technically demanding environment.

Strong knowledge of Windows, Linux and macOS systems, TCP/IP networking, cloud infrastructure and enterprise network environments.