Infrastructure Security Engineer

Salary: £60,000 - 75,000 per year

Requirements

• Commercial experience in an infrastructure or systems engineering role
• PowerShell scripting for install automation
• Hands-on experience with Microsoft Exchange messaging systems
• Proxmox environment management, including VM and template creation
• VMware vSphere administration, including virtual machines and virtual switches
• Windows Server, Active Directory, DNS, DHCP, OUs, and Group Policy experience
• WSUS experience, ideally in airgapped environments
• Experience managing secure removable-media processes
• Server hardening and security baselining aligned to CIS standards
• Solid networking fundamentals across LAN/WAN, routers, switches, and firewalls
• Strong communication and customer-facing skills
• Willingness to travel as required
• Willingness to undergo security clearance
• Full UK driving licence

Responsibilities

• Field install and support the infrastructure hosting our core products, often within secure environments
• Harden and secure client PCs and servers in line with recognised government and industry security standards
• Administer Domain Controllers, including FSMO roles, high availability, and replication monitoring
• Run patch management schedules across Windows Server and client estates
• Deploy and maintain antivirus and SIEM tooling
• Support customer hardware and software upgrades and new infrastructure rollouts
• Deliver training and knowledge transfer one-to-one or in small groups
• Provide remote support and join customer troubleshooting calls
• Take part in an on-call rotation to support 24x7 customer coverage

Technologies

• Active Directory
• Cloud
• Hardware
• Support
• Kubernetes
• LAN
• Linux
• PowerShell
• Security
• VMware
• Windows
• Confluence
• Network
• NFS

More

We are a specialist technology company operating in the national security and communications intelligence sector, supporting government, law enforcement, and telecoms clients around the world. This is a broad, hands-on infrastructure role with scope to expand into Linux, Kubernetes, and cloud as our environment evolves. We work onsite three days a week in Hampshire, with occasional travel to customer sites in the UK and internationally, and the role is hybrid remote based in Farnborough, GU14. The salary for this position is £60,000 to £75,000 per year.

last updated 32 week of 2026