Hybrid IT Administrator – High-Security ICT System

at qtlabs - Quantum Technology Laboratories GmbH

• Job title: IT Administrator – High-Security ICT System
• Job type: Full Time
• Experience level: Junior
• Salary: €3,500 per month
• Degree requirement: Bachelor's Degree
• Tech skills: Firewalls, Grafana, Linux, Prometheus, Python, VMware
• Location requirements: Hybrid, Wien, Austria

About the role

• IT Administrator operating high-security ICT systems at Quantum Technology Laboratories. Involving server administration, security implementation, and collaboration across interdisciplinary teams.

Responsibilities

• Operate and secure an ICT system with strict separation of network domains ("red-black separation").
• Design, implement, and monitor security-relevant network controls such as firewalls, VLANs, gateways, filtering mechanisms, and data-diode-based transmission paths.
• Perform security monitoring, log analysis, system hardening, and regular audits to ensure compliance.
• Manage user and access control concepts, implementing least-privilege and zero-trust principles.
• Operate and maintain local server environments (physical and virtual).
• Administer and monitor central services such as: NAS systems (storage, backups, snapshots, quotas), internal Git and GitLab instances, authentication and directory services, and internal communication and collaboration systems.
• Plan and execute updates, patches, security checks, and system optimizations.
• Automate recurring tasks using scripting languages (e.g., Bash, Python, PowerShell).
• Ensure reliable 24/7 operation of infrastructure components (including participation in an on-call rotation).
• Create and maintain technical documentation, runbooks, and security concepts.
• Provide user support in a strictly regulated IT environment.

Requirements

• Completed degree or relevant IT training (e.g., computer science, IT security, system administration) or equivalent professional experience.
• Several years of experience administering security-critical IT systems.
• In-depth knowledge of network segmentation and secure network architectures.
• Experience with red-black separation concepts / domain separation.
• Linux and/or Windows server administration.
• Virtualization technologies (e.g., VMware, KVM, Proxmox).
• Storage systems (NAS/SAN).
• Operation of Git/GitLab, CI/CD services, and internal DevOps workflows.
• Experience with monitoring tools (e.g., Prometheus, Grafana, ELK stack) is an advantage.
• Familiarity with security standards (e.g., BSI guidelines), hardening guides, and audit requirements.

Benefits

• Flexible working arrangements in a hybrid model combining remote and on-site collaboration.
• The opportunity to make a lasting impact on the future of quantum technologies.
• Collaborative and innovative working environment in Vienna.
• Balanced work-life integration for our employees.
• Attractive workplace with excellent infrastructure.