Looking for a Senior Infrastructure Engineer role where you can genuinely take ownership of a secure, high-impact environment?You''ll join a technology business operating in the defence sector, delivering secure systems across multiple platforms - with security, resilience and compliance being central to everything they do.You''ll be responsible for maintaining and improving internal infrastructure across a predominantly Windows-based environment, with a mix of virtualisation and networking responsibilities like:Windows Server 2019/2022 administrationMicrosoft 365 managementHyper-V, VMware and Proxmox virtualisationCisco and Palo Alto firewall supportLinux systems Patch management and vulnerability remediationBackup and disaster recoveryInfrastructure documentation and ISO compliance Alongside standard BAU responsibilities, you''ll also get involved in project work, including spinning up VMs, firewall configuration, and improving internal platform security. What you''ll need: Strong Windows Server experienceActive Directory, DHCP, DNS, Group PolicyFirewall configuration experienceSolid networking fundamentals (routing, switching, NAT, VPN)Exposure to Linux Location: Tewkesbury - due to the nature of the industry and environment, the requirement is 5 days a week on site.Salary: £50k-£55kSecurity clearance (SC) is required. You must be a UK national and eligible to obtain clearance.If you''d like to work in a secure, technically interesting environment where your infrastructure