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Senior Network Infrastructure Engineer - Defence Programme Location: Caerphilly (with travel to client / Ministry of Defence sites as required)Clearance: SC (must hold or be eligible); DV highly desirableSalary: 75,000 + Bonus + Comprehensive Benefits Package About the Role A major Defence programme is seeking a highly skilled Senior Network Infrastructure Engineer to lead the design, implementation and ongoing support of secure, resilient, multi?domain network services. You will work across datacentre networks, secure LAN/WAN, SDN?enabled virtualised environments, and deployed operational sites - ensuring high availability, compliance and adaptability in a mission?critical environment. Key Responsibilities Lead the design, configuration and support of secure multi?site LAN/WAN/SDN infrastructure. Configure and optimise enterprise switching platforms (e.g., Cubic M3X S8G / S24G, Cisco ESS3300?based). Implement routing protocols including BGP, MPLS, VPLS, and HA technologies. Configure firewalls, VPNs, IDS/IPS and boundary protection systems. Support virtualised routing and SD?WAN technologies (Cisco Catalyst 8000V). Act as senior escalation point for complex incidents. Ensure compliance with MOD security standards and Secure by Design principles. Maintain documentation, diagrams and CMDB records. Support accreditation processes (IT Health Checks, CCVAs). Contribute to network automation (Python, Ansible, PowerShell). Identify opportunities for architectural improvement. Essential Experience Extensive multi?site LAN/WAN experience. Advanced configuration skills on Cisco and Cubic platforms. Deep knowledge of BGP, MPLS, VPLS and segmentation. High?availability technologies (HSRP/VRRP equivalents). DNS, DHCP, NAT, IP planning. Experience in secure or Defence?oriented environments. ITIL?based service management. Desirable Experience VMware NSX and SDN, SD?WAN and virtualised routing, VoIP, QoS, SIEM/log analysis tools. Knowledge of JSP, ISO 27001, NIST. Experience leading technical projects. Existing SC/DV clearance. Qualifications Cisco CCNP (required); CCIE desirable. ITIL v4 Foundation or above. Degree in Computer Science, Network Engineering or equivalent experience. Personal Qualities Strong communicator. Analytical problem?solver. Able to mentor and lead. Customer centric and proactive.If you are a Senior Network Infrastructure Engineer with experience working in or with the Defence sector and looking for an exciting new challenge, please send your CV to me today.

Senior Infrastructure & Directory Services Engineer - Defence Programme Location: Caerphilly (with travel to Defence/Ministry of Defence sites as required)Clearance: SC (must hold or be eligible); DV highly desirablePackage: £65,000 + Bonus + comprehensive benefitsWorking Pattern: Hybrid (Mon & Fri optional WFH)This is a fantastic opportunity for you, a Senior infrastructure and Director Services Engineer - or similar, to join a long?established, financially robust technology provider with comprehensive experience delivering secure IT solutions across the UK public sector. The Opportunity A major Defence customer is undertaking an extensive programme to build a secure, on?premise, multi?domain virtualised infrastructure that underpins mission?critical and operational capabilities. As a Senior Infrastructure & Directory Services Engineer, you will design, implement, and support enterprise services across several secure domains - including Active Directory, identity services, Windows Server, DNS/DHCP, PKI, authentication platforms, and related Microsoft ecosystem components. Key Responsibilities - Architect, manage, and maintain multi?site Active Directory environments- Administer DNS, DHCP, and PKI in secure operational environments- Design and enforce Group Policy Objects (GPOs)- Manage Web Application Proxy (WAP), RDS, and federation services- Ensure alignment with MOD security standards- Participate in design reviews and Change Advisory Boards (CAB)- Work closely with security, cloud, networking, Linux, and virtualisation teams- Monitor performance using Splunk, event logging, and PowerShell automation- Automate tasks using PowerShell (essential) or Ansible (desirable) Essential Skills & Experience - Multi?site Active Directory support- Windows Server, DNS, DHCP- GPO design and troubleshooting- PKI and certificate services- Web Application Proxy & RDS- Strong PowerShell scripting- Working in a Defence or Government environment Desirable Skills - Defence sector experience- VMware vSphere, vCenter, ESXi; awareness of NSX?T- SIEM/monitoring experience- Ansible or other automation tools- Linux/Unix integration with AD- Secure WAN technologies (BGP/MPLS/VPN)- Existing SC/DV clearance Qualifications - Microsoft Identity & Access Administrator (or equivalent)- ITIL v4 Foundation or higher- Degree in Computer Science or equivalent experience Personal Attributes - Customer?focused and committed to service excellence- Strong ownership and reliability- Willingness to challenge established practices- Driven, proactive, and collaborativeIf you are a Senior Infrastructure and Director Services Engineer or similar, with a background in Defence, then please send your CV to me today as this will go quickly.