System Administrator (Defence & Security) is open at Reaktor in Helsinki. Posted on Oct 1, 2026, and still on Reaktor’s careers page when we last checked, on Nov 14, 2026.
About the role
Systems Installation & Maintenance – Build and maintain DefSec’s internal IT systems that enable high-performing development work. - Automation & Infrastructure Development – Maintain and improve automation for system maintenance, using state-of-the-art tooling. - Security & Stability – Ensuring our environments are safe, compliant, and reliable. - Cross-functional Collaboration – Partner with DefSec consultants…
The opening lines of the posting. The rest is on Reaktor’s careers page.
Hiring at Reaktor
Reaktor has 13 open roles right now. Most are in Engineering, Security and Operations. See all its roles