Duty Engineer - Infrastructure Operations Engineer (24/7 Secure Systems)

Duty Engineer - Infrastructure Operations Engineer (24/7 Secure Systems)Are you the right applicant for this opportunity Find out by reading through the role overview below.Location: On-site, Northallerton, North YorkshireDepartment: EngineeringSection: EngineeringReports To: Technical DirectorLocation: Secure UK Defence EnvironmentContract Type: PermanentClient: Our client is a specialist provider of secure ICT services supporting critical UK Defence systems. Operating within highly regulated, high-availability environments, they deliver resilient infrastructure, operational assurance, and rapid incident response across mission-critical platforms.The engineering teams work at the forefront of secure networking, virtualisation, automation, and monitoring technologies to ensure Defence systems remain available, compliant, and secure 24/7.Purpose of the Role: The Duty Engineer is a senior technical professional operating within secure Defence ICT environments, providing 24/7 operational support for mission-critical systems.The role ensures system availability, resilience, security, and rapid incident resolution in line with contractual SLAs and KPIs, combining deep infrastructure expertise with modern automation and monitoring practices to deliver stable and compliant services.You combine deep infrastructure expertise with modern automation and monitoring practices, enabling stable, efficient, and compliant service delivery within high-assurance environments.The role operates as part of a structured 24/7 duty rota, requiring out-of-hours, on-call, and incident response support to maintain continuous operational service.Key Responsibilities:The successful candidate will be responsible for:Providing 24/7 operational duty support to ensure the availability, security, and performance of Defence ICT systemsActing as a technical first responder for incidents, alerts, and service degradation within secure environmentsTroubleshooting and maintaining LAN, WAN, MPLS, SD-WAN networks, firewalls, and VPN servicesAdministering Active Directory and domain services, including DNS, PKI, RDS, WSUS, and related platformsManaging VMware virtualisation environments, including ESXi, vCenter, and VMware Cloud FoundationOperating and supporting ASTERIX VoIP systemsMaintaining SIEM and monitoring platforms, including Splunk and Microsoft System Centre toolingPerforming Linux system administration, patching, and security hardeningCreating and maintaining automation using PowerShell, Ansible, and GitLabSupporting vulnerability remediation, compliance activities, and audit readinessDelivering incident response, root-cause analysis, and service restoration in line with agreed SLAs and KPIsCoordinating technical response and escalation to prevent incident impact or recurrenceExperience, Skills & Qualifications:Essential / Highly Desirable:CCNA (or equivalent experience)LAN, MAN, and campus networkingBGP, MPLS, VPLS, and VPN technologiesSoftware-Defined Networking (VMware NSX) and SD-WANSecurity systems administration, including IDS/IPSActive Directory, ADFS, PKI, DNS, DHCP, GPO, RDS, WSUS, WAPVMware vSphere, ESXi, and VMware Cloud Foundation administrationASTERIX VoIP systemsSIEM & monitoring: Microsoft System Centre Suite, Splunk Enterprise / ES / ITSITelemetry platforms: OpenTelemetry, TelegrafLinux administration and security patchingAutomation and scripting using PowerShell, Ansible, and GitLabApplication Process: To apply, please submit your CV detailing your relevant experience and qualifications for the role. Applications will be reviewed on a rolling basis, so early submissions are encouraged.Equal Opportunity Employer: We value diversity and are committed to creating an inclusive work environment. xjdpvnf We encourage applicants from all backgrounds to apply.Contact: Elvis Eckardt

Created: 2026-01-10