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 desirable
Package: £65,000 + Bonus + comprehensive benefits
Working Pattern: Hybrid (Mon & Fri optional WFH)
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 collaborative
If 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.
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