Overview
We're seeking an experienced Senior Microsoft Infrastructure Engineer to join a major government transformation programme delivering secure enterprise services within highly classified environments.
You'll play a key role designing, deploying, and supporting core Microsoft platforms including Active Directory, Exchange, SharePoint, Windows Server, RDS, and End User Computing services across secure and air-gapped networks.
Responsibilities
- Deploy, administer, and harden Microsoft enterprise platforms including Active Directory, Exchange Server SE, and SharePoint Server SE.
- Design and support secure Windows desktop, server, and virtual desktop solutions.
- Build and maintain Remote Desktop Services (RDS) environments.
- Develop and manage Group Policy, RBAC controls, security baselines, and platform hardening standards.
- Create and maintain Windows gold images and endpoint configurations.
- Operate and support business-critical services within secure, disconnected, and air-gapped environments.
- Troubleshoot complex infrastructure, identity, and endpoint issues.
- Collaborate with architecture, security, and engineering teams to deliver secure enterprise solutions.
- Produce High-Level Designs (HLDs), Low-Level Designs (LLDs), implementation plans, operational procedures, and support documentation.
- Support governance activities and Technical Design Authority (TDA) reviews.
Essential Skills & Experience
- Strong experience administering Microsoft enterprise technologies in large-scale environments.
- Expertise across:
- Active Directory Domain Services (AD DS)
- Windows Server
- Exchange Server
- SharePoint Server
- Group Policy (GPO)
- Remote Desktop Services (RDS)
- Identity & Access Management
- Experience implementing security baselines, platform hardening, and privileged access controls.
- Proven experience working within secure, regulated, or classified environments.
- Strong troubleshooting, technical documentation, and stakeholder engagement skills.
Technical Environment
Microsoft: Active Directory, Exchange Server SE, SharePoint Server SE, Windows Server, Windows 10/11, Group Policy, RDS
Security: STIGs, Security Baselines, RBAC, Identity Management, Platform Hardening
Infrastructure: Virtualisation, Secure Networks, Air-Gapped Environments, Enterprise Collaboration Platforms
Disclaimer
Notwithstanding any guidelines given to level of experience sought, we will consider candidates from outside this range if they can demonstrate the necessary competencies.