Job offer : Windows Security Expert (M/F)

Do you enjoy locking down access, hardening infrastructures, and taking on major security challenges? Join our client's expert teams to take charge of the administration, operation, and hardening of our critical Windows environments. At the heart of our cyber strategy, you will be the guarantor of the robustness of our identity management, cryptography, and privileged access solutions.

Your daily missions: Guarantee the integrity of the Microsoft PKI: You administer AD CS infrastructures, supervise the complete lifecycle of certificates, and ensure their renewal without service interruption.

Protect sensitive access (PAW): You deploy, maintain, and evolve secure administration stations (Privileged Access Workstations) to isolate high-risk administration tasks.

Master identity federation (ADFS & IAM): You ensure the proper functioning, security, and evolution of ADFS for access to enterprise applications.

Harden environments (Hardening): You apply the strictest security standards (CIS Benchmarks, ANSSI recommendations) on Windows servers and the Active Directory directory.

Respond to incidents & participate in projects: You analyze security alerts related to identities, participate in remediation, and design the technical architecture of future evolutions.

What we are looking for Education & Experience: From a 2-year degree (BTS/DUT) to a 5-year degree in IT / cybersecurity, you have at least 5 years of experience in the administration and securing of large-scale Microsoft environments.

Key skills

Advanced mastery of Active Directory, Microsoft PKI (AD CS), and ADFS.

Solid experience with bastion/administration station concepts (PAW, AD tiering model, PAM).

Best practices for OS hardening (GPO, AppLocker/WDAC, Credential Guard).

Automation via PowerShell.

Team spirit & Rigor: Analytical sense, responsiveness to incidents, and a strong taste for clear technical documentation.