Dean Longstaff enhanced secure access control for the PUI application in the External environment of the ministryofjustice/staff-identity-idam-entra-infra repository. He applied Infrastructure as Code principles using Terraform to update allowed_groups, granting targeted user access while supporting least-privilege policies and reducing manual provisioning. Dean’s work focused on improving external collaboration and maintaining compliance, with no critical bugs reported during the period. The technical approach demonstrated proficiency in DevOps practices, access control policy management, and commit-driven development. The depth of the work lay in aligning security requirements with automated infrastructure changes, resulting in a more robust and manageable access framework.