La Fosse
Active Directory & Identity Engineer
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Active Directory & Identity Engineer
Location: London
Working Pattern: 3 days per week onsite
Rate: £600–£675 per day
IR35: Inside IR35
Duration: Contract
We are looking for an experienced AD & Identity Engineer to join a large-scale merger programme, providing hands-on delivery support across identity, authentication and Single Sign-On (SSO).
You will be responsible for implementing identity changes, supporting SSO remediation and helping ensure Day 1 readiness across a complex enterprise environment.
Key Responsibilities
- Deliver identity and authentication changes across on-premise and hybrid environments
- Support Microsoft Active Directory and Microsoft Entra ID changes
- Implement and troubleshoot SSO integrations using SAML 2.0 and OpenID Connect (OIDC)
- Support identity attribute changes, including UPN and email address updates
- Troubleshoot authentication and access issues
- Support testing, cutover and go-live activities
- Work closely with project and programme teams to deliver structured identity changes
- Support change and release processes throughout the merger programme
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Key Skills & Experience
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- Strong hands-on Microsoft Active Directory experience across on-premise and hybrid environments
- Strong Microsoft Entra ID / Azure AD experience
- Proven experience with SSO technologies, particularly SAML 2.0 and OIDC
- Understanding of identity attributes and authentication flows
- Working knowledge of certificates and PKI in relation to identity and SSO
- Strong troubleshooting skills across authentication and access issues
- Experience delivering identity changes within large enterprise environments
- Hands-on experience supporting SSO migrations, updates or remediation
- Experience working through testing, cutover and go-live
- Comfortable working within structured project, change and release environments
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