Salary: £104,400 - 112,020 per year Requirements: Strong system administration experience across Windows, Linux, and network environments Solid understanding of infrastructure security, patching, and hardening Experience with Active Directory and identity/access management Knowledge of SQL Server and enterprise environments Ability to manage multiple priorities in a structured (ITIL-driven) environment Strong problem-solving skills and a proactive mindset Nice to have: Experience in regulated environments (e.g. NIS-CAF) Nice to have: Exposure to OT environments, SCADA, PLCs, or telemetry systems Nice to have: Utilities or infrastructure sector experience Nice to have: Understanding of cyber security tooling (EDR, IDS, backup solutions) Responsibilities: Supporting a large-scale cyber programme aligned to regulatory standards (E-CAF) Managing and securing core infrastructure across Windows & Linux servers, SQL databases, and Cisco networks Driving patching, vulnerability management, and system hardening best practices Supporting rollout and optimisation of security tooling including EDR and intrusion detection Integrating and maintaining Active Directory and identity governance processes Supporting incident resolution and maintaining service continuity across critical systems Contributing to secure system design, documentation, and UAT processes Working closely with internal security teams and external partners Technologies: Active Directory Cisco ITIL Linux Network SQL Security Windows Support More: We are a unique nonprofit organisation undergoing a significant cyber and infrastructure uplift across our operational technology environment. Our team is focused on impact and transformation, working collaboratively to ensure robust security across critical national infrastructure. We offer a blend of project work and operational ownership, with a strong long-term investment in technology and security. We value diversity in our workforce and are committed to creating an inclusive environment for all team members. last updated 16 week of 2026