Salary: £50,000 - 55,000 per year Requirements: Strong Windows Server experience Active Directory, DHCP, DNS, Group Policy knowledge Firewall configuration experience Solid networking fundamentals (routing, switching, NAT, VPN) Exposure to Linux Security clearance (SC) required UK national eligible to obtain clearance Responsibilities: Maintain and improve internal infrastructure across a predominantly Windows-based environment Administer Windows Server 2019/2022 Manage Microsoft 365 Handle Hyper-V, VMware, and Proxmox virtualization Support Cisco and Palo Alto firewalls Engage in Linux systems management Conduct patch management and vulnerability remediation Oversee backup and disaster recovery Maintain infrastructure documentation and ensure ISO compliance Participate in project work, including spinning up VMs and firewall configuration Improve internal platform security Technologies: Active Directory Cisco Firewall Hyper-V Support Linux Microsoft 365 NAT Security VPN VMware Windows Office 365 DevOps More: We are a technology business operating in the defence sector, dedicated to delivering secure systems across multiple platforms. Our focus is on security, resilience, and compliance in everything we do. Located in Tewkesbury, we require our team to be on-site five days a week to maintain the high security standards of our work environment. We offer a competitive salary of £50k-£55k and foster an inclusive workplace, particularly invested in Neurodiversity inclusion with reasonable adjustments available in the interview process. last updated 9 week of 2026