Systems & Networks Administrator – Secure, Scalable IT Infra

Alta Ares; Paris; On-site; EUR 55,000 - 75,000; Full time

Job summary

Alta Ares is seeking an IT Infrastructure Specialist to administer and evolve our global IT footprint across Windows, Linux, macOS, and cloud services (GCP, Scaleway) in Paris.

The role focuses on securing enterprise networks, managing IAM, MDM/MAM/RMM, and implementing Zero Trust while automating recurring tasks with PowerShell and Bash. You will collaborate with security and IT teams to scale operations and resilience.

Qualifications

• 3 to 5 years of experience in systems and network administration.
• Strong knowledge of Windows, Linux and macOS, networking and cloud infrastructure.
• Experience with IAM, endpoint management, cybersecurity tools and monitoring.
• Familiarity with Google Workspace and/or Microsoft 365, EDR/XDR and IT automation.
• Proficient in scripting with PowerShell, Bash or APIs to automate tasks.
• Autonomous, rigorous and security-focused mindset.
• Ability to lead infrastructure projects and improve IT operations.
• Degree in IT, systems and networks or equivalent.

Responsibilities

• Administer 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 802.1X/NAC.

Skills

Windows

Linux

macOS

Networking

Cloud infrastructure

IAM

Cybersecurity tools

Scripting

Automation

Google Workspace / MS 365

EDR/XDR

Incident monitoring

Education

Bac+2 to Bac+5 in IT / Systems and Networks

Tools

NinjaOne

Apple Business Manager

Google Workspace

Microsoft 365

Job description

Alta Ares is seeking an IT Infrastructure Specialist to administer and evolve our global IT footprint across Windows, Linux, macOS, and cloud services (GCP, Scaleway) in Paris.

The role focuses on securing enterprise networks, managing IAM, MDM/MAM/RMM, and implementing Zero Trust while automating recurring tasks with PowerShell and Bash. You will collaborate with security and IT teams to scale operations and resilience.