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.

• 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.

• 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.

• 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.

• 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.