Infrastructure Engineer - Outside IR35

The Opportunity

We are looking for an experienced SC Cleared Infrastructure Engineer to join a greenfield Defence programme, helping to design and build a new secure infrastructure environment from the ground up.

This is a hands-on design and build role rather than BAU support.

You will work across Windows infrastructure, Linux, virtualisation and security, helping establish a secure environment incorporating hardening, monitoring, logging and Zero Trust principles and Secure by Design practices.

The Role

• Working within a multidisciplinary engineering team, you will:
• Design and build secure infrastructure within a greenfield environment.
• Work across Windows Server 2022/2025, Active Directory, Group Policy and Windows 11, alongside some Linux/Ubuntu.
• Configure and harden Microsoft infrastructure and virtualisation solutions, including Hyper-V.
• Implement infrastructure security controls and Secure by Design principles.
• Work with networking and security components, including firewalls, identity and access controls.
• Support SIEM, centralised logging, monitoring and observability, potentially including Splunk.
• Support vulnerability management, remediation and technical assurance.
• Produce technical designs, build documentation and configuration baselines.
• Investigate technologies and environments, taking solutions from initial requirements through to implementation.

The Person

• You will be a self-starting Infrastructure Engineer who is comfortable working within greenfield, secure environments.
• You should have:
• Strong Windows infrastructure engineering experience.
• Windows Server, Active Directory and Group Policy experience.
• Microsoft virtualisation experience, ideally Hyper-V.
• Working knowledge of Linux/Ubuntu.
• Experience building infrastructure environments from the ground up.
• Strong security hardening experience.
• Knowledge of SIEM, logging, monitoring and observability; Splunk would be beneficial.
• Experience with vulnerability management and security configuration/compliance.
• An understanding of networking and firewall technologies.
• Previous experience within Defence, Government or another secure environment.
• The ability to work autonomously and turn requirements into practical technical solutions.