IT System Administrator Windows (m/f/d)

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

• Vulnerability management, patch management, and compliance assessments

• Documentation of hardening measures and contribution to security concepts

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What you bring to the team:

• Strong hands-on experience in Windows 11 administration and hardening (security baselines, BitLocker/alternatives, Credential Guard)

• Experience with Rohde & Schwarz Trusted Disk or comparable encryption solutions

• Experience with Symantec Endpoint Security or comparable EDR/AV products

• Knowledge of ACLs, GPOs, Intel TET, and PowerShell

• Experience hardening common distributions (Debian/Ubuntu, RHEL/SUSE)

• Experience working with CIS Benchmarks and/or BSI requirements; ideally with automation using Ansible and Bash scripting

• Good knowledge of networking concepts (TCP/IP, DNS, VLANs, firewalling)

• Proficiency in using Wireshark for network traffic analysis and troubleshooting

• Knowledge of the requirements for handling information classified as VS-NfD (ideally experience working in environments with corresponding security classifications; willingness to undergo a security clearance procedure in accordance with the German Security Clearance Act (SÜG))

• Understanding of vulnerability and patch management processes

• Structured, documentation-oriented approach to work; proficiency in written and spoken German and English

• Strong communication skills, particularly when working with software developers

• Certifications such as CompTIA Security+, LPIC, or Microsoft SC-/MD-series certifications