Infrastructure Security Engineer
Summary
Designs and secures on-prem infrastructure, automates deployments with PowerShell, and maintains Windows Server, Exchange, VMware, and Proxmox environments.
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
- 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
- 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
