IT-Systemadministrator (m/w/d)

Job Description

We are looking for a driven and hands-on IT-System Administrator to build, secure, and operate our mission-critical infrastructure. You will own our Microsoft ecosystem, design and harden network architecture, and establish robust security standards across the organization. Operating across strategy and execution, you provide reliable First- to Third-Level Support while shaping our security foundation as we scale. Tasks THE DAY-TO-DAY Own the Network: Design, deploy, and maintain our infrastructure — VLANs, VPNs, RADIUS, firewalls, and load balancers — across cloud and on-prem environments. Lock It Down: Harden Windows/Linux systems, manage SIEM/EDR tooling, and operate IDS/IPS to detect and contain threats before they land. Control the Stack: Own Microsoft 365, Entra ID, Intune, and Autopilot — keeping the entire device fleet compliant and audit-ready (NIS2, ISO 27001). Set the Standard: Define and enforce access control, patching, backup, and incident response policies across the organization. Enable Every Team: Be the go-to for First- to Third-Level Support — from onboarding and device setup to rapid troubleshooting under operational pressure. Build for Scale: Conduct capacity planning, security assessments, and pen test coordination as we grow our infrastructure and mission footprint. Requirements YOU SHOULD APPLY IF Experience: 3+ years in IT, network & security engineering, owning infrastructure end-to-end. Certifications: CCNA required; CCNP, CISSP, or equivalent a strong plus. Microsoft Stack: Deep expertise in Microsoft 365, Intune, Autopilot, and Entra ID. Network & Security Skills: Hands-on with firewalls, IDS/IPS, VPNs, RADIUS, and hybrid network environments; strong skills securing Windows/Linux systems. Compliance Know-How: Familiar with NIS2, ISO 27001, or NIST frameworks. Language: Fluent English required; German is a strong plus (Munich-based environment). NICE TO HAVES Background in defense, aerospace, or other security-critical sectors. Scripting & automation skills (PowerShell, Bash, Python). Experience with intrusion detection/prevention systems and advanced threat analysis. Benefits WHAT WE OFFER Real impact & ownership: Shape high-tech defense systems and take responsibility from day one. Mission-driven environment: Work on technologies that matter for European security and sovereignty. Competitive package: Competitive salary, EGYM Wellpass, corporate benefits, and equity options. Deep tech environment: Hands-on experience with cutting-edge drone technology and real operational use cases. Grow fast: Steep learning curve for juniors, strategic influence and leadership for seniors. Flexibility: Flexible hours, remote options, and relocation support. Strong team: International, driven colleagues and a culture built on trust and shared success. About us Twentyfour Industries is committed to building a fair, inclusive, and high-performance workplace where people from all backgrounds can contribute and thrive.

Required Skills