Salary: £40,000 - 80,000 per year Requirements: Proficient in Linux and Windows Server 2016 administration Experience with Proxmox virtualization Familiarity with Reverse Proxy Web Server Management Knowledge of Application Proxy Gateway Experience with cloud and hybrid server environments Understanding of ITIL frameworks and MDM platforms Proficient in Microsoft 365 and Exchange (Online / Hybrid) Experience with IIS and secure web server hosting Knowledge of identity integration (Knox, Intune, Azure AD / Entra ID) Experience with TrueNAS administration Knowledge of file services (SMB, NFS, iSCSI) Proficient in backup and recovery using Veeam systems Understanding of RADIUS authentication and policy generation Knowledge of PKI and server certificate management Experience with cross-platform identity integration Ability to design and segment networks Familiarity with Cisco and Ubiquiti hardware Knowledge of VPNs, secure connectivity, and access control Experience with Kubernetes cluster operations Knowledge of persistent storage integration Familiarity with certificate-based authentication Understanding of Zero Trust and defense-in-depth principles Knowledge of network and identity security, server and platform hardening Experience with monitoring, logging, and incident response Familiarity with ISO 27001 aligned practices CompTIA Network certification Vendor-agnostic networking skills Proficient in Linux, Windows, M365, and Cloud technologies Experience in customer-facing engineering (CE) Responsibilities: Secure design and operation of hybrid on-prem and cloud infrastructure Provide technical support to internal colleagues and management Manage Linux and Windows Server 2016 environments Oversee Proxmox virtualization activities Ensure effective reverse proxy web server management Support application proxy gateway operations Manage cloud and hybrid server environments Implement ITIL frameworks and MDM platforms Administer Microsoft 365 and Exchange (Online / Hybrid) Oversee IIS and secure web server hosting Manage identity integration solutions (Knox, Intune, Azure AD / Entra ID) Administer TrueNAS storage systems Manage file services including SMB, NFS, and iSCSI Handle backup and recovery processes using Veeam systems Oversee RADIUS authentication and policy generation Manage PKI and server certificate operations Implement cross-platform identity integration solutions Design and segment network infrastructures Work with Cisco and Ubiquiti hardware Manage VPNs and secure connectivity solutions Operate Kubernetes clusters and manage persistent storage Implement certificate-based authentication mechanisms Apply cybersecurity principles to network and identity security Perform monitoring, logging, and incident response activities Ensure compliance with ISO 27001 aligned practices Technologies: Azure Cloud Cisco Hardware Support ITIL Kubernetes Linux Microsoft 365 Network NFS Security SMB Veeam Web Windows Office 365 DevOps More: We are excited to announce a new opportunity for a Senior Infrastructure & Network Systems Engineer to join our Head Office team in Enfield. This role is essential to secure the design and operation of our hybrid on-prem and cloud infrastructure. We offer a collaborative work environment, and our commitment to equal opportunities ensures we value diversity. Additionally, we have an employee referral scheme to reward you for bringing new talent to our team. Join us and be part of a forward-thinking organization! last updated 19 week of 2026