IT & Security Manager

What we're looking for

We're hiring an IT & Security Manager to design, build, and run the backbone of Twentyfour Industries' IT, cyber, and physical security infrastructure. This is a broad, hands-on role with three core dimensions: defining IT and security strategy, implementing and operating day-to-day infrastructure, and building robust data loss and downtime prevention systems. You'll own our Microsoft 365 and cloud environment, set up and maintain on-prem IT and network infrastructure, harden devices and networks, and define the standards that keep our people, data, and products secure in a defense-critical environment.

The day-to-day

• Own and secure our Microsoft 365, Entra ID, and device management environment.
• Build and maintain core IT systems across cloud, networks, and endpoints (Windows and Linux).
• Implement company-wide defenses, including endpoint security, monitoring, and vulnerability management.
• Define and enforce standards for access control, patching, backups, and incident response.
• Design, manage, and operate physical security and access control systems.
• Ensure compliance with current and upcoming regulatory frameworks (e.g. NIS2).
• Run internal security reviews, coordinate external audits and penetration tests, and monitor for leaks or breaches.
• Handle onboarding, offboarding, and day-to-day IT support needs across the company.
• Enable secure engineering workflows and tooling, including source control and collaboration systems.
• Support rapidly changing engineering requirements in a fast-paced startup environment (e.g. VLANs, routing for test setups, new software deployments).
• Drive a strong security culture through training, awareness, and clear standards.
• Empower engineering and business teams with reliable, high-performance IT infrastructure.

You should apply if you

• Have 3+ years of experience in IT, security, or infrastructure engineering.
• Know Microsoft 365, Intune, Autopilot, and Entra ID deeply.
• Are comfortable hardening Windows and Linux systems across servers and endpoints.
• Have experience with SIEM / EDR tools and monitoring hybrid cloud and on-prem environments.
• Are pragmatic and able to balance security, speed, and usability in a fast-moving startup.
• Communicate clearly, act with discretion, and build trust quickly.
• Speak fluent English (German is a plus).
• Have experience with configuration management tools such as Puppet or Ansible.
• Understand network infrastructure, including fiber and copper Ethernet, link aggregation, VLANs, VPNs, and RADIUS.
• Have overseen physical network infrastructure projects end-to-end, from contractor coordination to racks, patch panels, and cabling.
• Have experience with physical access control systems (e.g. HID, TKH).
• Are familiar with SSO concepts and implementations (e.g. SAML).
• Have hands-on experience with hypervisors such as VMware ESXi.

Nice to haves

• Experience in defense, aerospace, or other security-sensitive industries.
• Exposure to compliance frameworks and audits (ISO 27001, NIST, GDPR).
• Scripting or automation skills (PowerShell, Bash, Python).
• Experience with traditional on-prem Active Directory, Group Policy, and software deployment.
• Experience with 802.1X device authentication.
• Experience managing smartcards, hardware 2FA tokens (e.g. YubiKey), and PKI infrastructure.

What we offer

• Competitive salary and equity options.
• The opportunity to build the IT & Security function from scratch.
• A central role with direct exposure to founders, engineering, and operations.
• A fast-growing, mission-driven defense startup shaping European sovereignty.
• Flexible working conditions and relocation support for top candidates.

About us

Twentyfour Industries is committed to building a fair, inclusive, and high-performance workplace where people from all backgrounds can contribute and thrive. Our team brings together individuals with different perspectives, experiences, and skills to shape the future of European security and technology.

All applicants will receive equal consideration for employment regardless of gender, age, disability, ethnic or social origin, religion or belief, sexual orientation, or any other status protected by applicable European or national law.

We particularly welcome applications from individuals who are underrepresented in the technology and defense sector, including women, people with disabilities, and those from diverse cultural backgrounds.

We aim to provide a respectful, supportive, and transparent recruitment process. If you require adjustments to take part in our hiring process, please let us know so we can accommodate your needs.

If you share our mission and are motivated to work on challenges with real-world impact, we look forward to your application.