IT Administrator (m/f/d) – Windows & Linux Security / Hardening

At Quantum Systems, we are redefining the future of unmanned systems with intelligent, autonomous solutions that enable better decisions in critical environments. Our mission is to combine cutting-edge technology, AI, and robust engineering to create next-generation intelligence solutions. As part of our IT team, you will play a key role in ensuring the security, stability, and resilience of our global IT infrastructure. What is your Day to Day Mission: Hardening and secure operation of Windows 11 endpoints (security baselines, GPOs, security policies), including endpoints used as Ground Control Stations Administration and rollout of Rohde & Schwarz Trusted Disk (BSI-approved full-disk encryption for VS-NfD classified information) Implementation and compliance with requirements governing the handling of information classified as VS-NfD Operation and maintenance of Symantec Endpoint Security (Broadcom): policies, updates, and incident handling Hardening of Linux systems in accordance with recognized standards (e.g., CIS Benchmarks) Vulnerability management, patch management, and compliance assessments Documentation of hardening measures and contribution to security concepts