Identity Solutions Engineer

Location: MOD Corsham - Full Time, On-Site
Duration: 1 November 2025 - 30 June 2026
Clearance: Active and transferable DV (Developed Vetting) required

Rate: £500 - £580 per day - Inside IR35

About the Role

We are seeking a skilled Identity Solutions Engineer to play a key role in delivering a greenfield on-premise identity solution within a secure defence environment. This position offers an opportunity to work on the full lifecycle of a major identity deployment - from design and implementation through to operational support.
The successful candidate will work closely with the Solution Architect to build, configure, and maintain a secure, scalable, and resilient identity infrastructure based on Microsoft technologies.

Key Responsibilities

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  Implement and configure an on-premise identity solution based on Microsoft Windows Server 2022, Active Directory (AD), and Active Directory Federation Services (ADFS).
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  Work from detailed solution designs to deploy and integrate identity components, ensuring performance, resilience, and compliance with security standards.
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  Configure and maintain federation services with other on-premise identity providers, supporting secure authentication and trust relationships.
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  Implement Single Sign-On (SSO) and Role-Based Access Control (RBAC) in line with architectural requirements.
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  Collaborate with networking, security, and application teams to ensure seamless integration with dependent systems.
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  Develop and maintain comprehensive technical documentation, including configuration guides and deployment procedures.
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  Participate in testing, validation, and transition to operations, ensuring readiness for live support.
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  Provide ongoing operational support, including incident resolution, change management, patching, and performance optimisation.
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  Drive continuous improvement, identifying opportunities for automation, hardening, and enhanced monitoring of identity services.

Essential Skills and Experience

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  Previous experience working in a Defence or National Security environment.
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  Proven background as an Identity Engineer, Infrastructure Engineer, or Systems Administrator with a focus on Microsoft identity technologies.
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  Strong, hands-on experience in:
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    Windows Server 2022 installation, configuration, and management.
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    Active Directory design, replication, Group Policy, and security configuration.
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    ADFS deployment and configuration, including claims-based authentication and trust establishment.
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    Federating with on-premise identity providers using SAML, OAuth 2.0, and OpenID Connect.
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  Solid understanding of SSO, RBAC, and secure authentication practices.
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  Good knowledge of networking fundamentals (DNS, routing, load balancing, firewalls) and their impact on identity services.
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  Experience supporting complex enterprise environments and troubleshooting identity-related issues.
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  Familiarity with on-premise virtualisation technologies such as VMware Cloud Foundation and private cloud infrastructures.

Desirable Skills

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  Microsoft Certified: Identity and Access Administrator Associate (or equivalent certification).
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  Experience with PowerShell scripting for automation and operational efficiency.
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  Familiarity with monitoring and alerting tools for AD and ADFS.
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  Exposure to hybrid identity models integrating on-premise and cloud systems.
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  Strong attention to detail and methodical documentation practices.
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  Proactive, collaborative, and security-focused approach to delivering stable identity systems.

Additional Information

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  Security Clearance: DV clearance must be active and transferable prior to submission.
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  Working Arrangement: 100% on-site in MOD Corsham.