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Healthcare
Closing security gaps and enforcing consistent policies across a large London NHS trust while maintaining operational continuity
How Active Directory was remediated to strengthen security and governance
Improved AD Security Posture
Operational Continuity Maintained
Governed & Standardised
The Customer
Healthcare
Client:
Large - Enterprise
Size:
United Kingdom
Geography:
The Challenge
A large NHS acute care trust in London identified critical security gaps and misconfigurations within their Active Directory (AD) environment.
These issues posed risks to:
Authentication reliability across clinical and administrative systems
Overall security posture
Access governance and policy enforcement
Operational continuity during hospital hours
The trust required rapid, tactical remediation delivered in a structured and fully governed approach, ensuring security improvements without disrupting critical services.
Key Activities
Initiation & Prioritisation Workshop
Remediation Workstream Execution
Active Directory Fixes & Hardening
Governance & Change Control
Technologies
Microsoft Active Directory (AD DS)
Group Policy (GPO)
Windows Server
NHS corporate identity and authentication systems
The Solution
Venture 1 delivered a controlled, tactical Active Directory remediation programme, providing:
Enhanced security and resilience across AD
Improved governance and structured change processes
Reduced risk of authentication failures for clinical and administrative staff
Clear ownership and documentation for ongoing AD management
Benefits & Results Derived
Improved AD Security Posture – Policies and configurations aligned with best practice, reducing risk.
Stabilised Identity Operations – Authentication reliability strengthened for critical hospital systems.
Reduced Operational Risk – Fewer misconfigurations and security gaps across AD.
Governance & Compliance – CAB-approved process and documentation ensured repeatable and auditable changes.
Clear Ownership & Knowledge Transfer – IT teams empowered to manage and monitor AD effectively.