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# Infrastructure Engineer SC cleared (Microsoft)

- **Company:** Square One Resources Limited
- **Location:** Bristol, United Kingdom
- **Experience:** Expert
- **Salary:** £122,200 - £124,800
- **Contract:** Temporary contract
- **Skills:** Microsoft Windows, Active Directory, Microsoft Online Services, Microsoft Exchange Server, High-Level Architecture, Identity and Access Management, Windows Servers, Virtual Desktops, Role-Based Access Control, Remote Desktop Services, Microsoft SharePoint, User Environment Management, Virtualization Technology, Windows Desktop, Software Troubleshooting, Amazon Relational Database Service, CIS Benchmarks, Windows Client
- **Published:** November 14, 2026
- **Apply:** https://www.careerboard.com/gb/en/find-jobs-in-United-Kingdom/-0D6EE36EE6777BFB97/

## About the Role

* 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

## Description

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., * 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