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
Implement and configure an on-premise identity solution based on Microsoft Windows Server 2022, Active Directory (AD), and Active Directory Federation Services (ADFS).
Work from detailed solution designs to deploy and integrate identity components, ensuring performance, resilience, and compliance with security standards.
Configure and maintain federation services with other on-premise identity providers, supporting secure authentication and trust relationships.
Implement Single Sign-On (SSO) and Role-Based Access Control (RBAC) in line with architectural requirements.
Collaborate with networking, security, and application teams to ensure seamless integration with dependent systems.
Develop and maintain comprehensive technical documentation, including configuration guides and deployment procedures.
Participate in testing, validation, and transition to operations, ensuring readiness for live support.
Provide ongoing operational support, including incident resolution, change management, patching, and performance optimisation.
Drive continuous improvement, identifying opportunities for automation, hardening, and enhanced monitoring of identity services.
Essential Skills and Experience
Previous experience working in a Defence or National Security environment.
Proven background as an Identity Engineer, Infrastructure Engineer, or Systems Administrator with a focus on Microsoft identity technologies.
Strong, hands-on experience in:
Windows Server 2022 installation, configuration, and management.
Active Directory design, replication, Group Policy, and security configuration.
ADFS deployment and configuration, including claims-based authentication and trust establishment.
Federating with on-premise identity providers using SAML, OAuth 2.0, and OpenID Connect.
Solid understanding of SSO, RBAC, and secure authentication practices.
Good knowledge of networking fundamentals (DNS, routing, load balancing, firewalls) and their impact on identity services.
Experience supporting complex enterprise environments and troubleshooting identity-related issues.
Familiarity with on-premise virtualisation technologies such as VMware Cloud Foundation and private cloud infrastructures.
Desirable Skills
Microsoft Certified: Identity and Access Administrator Associate (or equivalent certification).
Experience with PowerShell scripting for automation and operational efficiency.
Familiarity with monitoring and alerting tools for AD and ADFS.
Exposure to hybrid identity models integrating on-premise and cloud systems.
Strong attention to detail and methodical documentation practices.
Proactive, collaborative, and security-focused approach to delivering stable identity systems.
Additional Information
Security Clearance: DV clearance must be active and transferable prior to submission.
Working Arrangement: 100% on-site in MOD Corsham