Infrastructure Consultant – Windows & Linux/Unix Hardening

Infrastructure Consultant – Windows & Linux/Unix Hardening

Reading UK (Hybrid)

SC Clearance Required (active)

We are currently seeking an experienced Infrastructure Consultant to support a secure enterprise environment, focusing on Windows and Linux/Unix server hardening. This role is ideal for someone with strong operating system fundamentals, attention to detail, and experience working in regulated or secure environments.

You will be responsible for securing servers—primarily Linux/Unix, with some Windows—by applying approved hardening standards. The role involves a mix of manual configuration, script execution, and technical documentation, ensuring systems comply with defined security baselines.

• Apply predefined hardening configurations across Linux/Unix and Windows servers
• Log into servers to perform manual changes in line with MCS 2.0 hardening standards (minimum configuration settings as advised by VF3)
• Execute existing Shell and PowerShell scripts to support configuration tasks
• Accurately document all changes and configurations
• Identify, troubleshoot, and escalate issues where required

• Strong understanding of Linux/Unix (e.g. Red Hat, Oracle Linux, Alma) and Windows OS architecture
• Familiarity with Shell scripting and PowerShell
• Ability to follow security hardening guidelines and resolve basic OS-level issues
• Experience working in secure or controlled environments

• Active SC Clearance is mandatory – applications without valid clearance cannot be considered