Infrastructure Engineer SC cleared (Microsoft) at Square One Resources, Bristol, 6 to 12 Months, £470-£480 per day

Senior Microsoft Infrastructure Engineer (SC or DV Cleared) - Outside IR35

Hybrid: 3 Days Onsite, in Bristol
Rate: Up to £480 per day Outside IR35
Clearance: Active SC or DV Clearance Required

Duration: initial 6-12 month contract

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.
Square One is acting as both an employment agency and an employment business, and is an equal opportunities recruitment business. Square One embraces diversity and will treat everyone equally. Please see our website for our full diversity statement.