Russell McLean enhanced the ministryofjustice/analytical-platform repository by delivering a DMS ingress policy feature that enabled secure cross-account data ingestion and standardized resource naming to align with metadata conventions. Using AWS, IAM, and Terraform with HCL, he added a trusted role ARN to the policy, improving both security and maintainability. In a subsequent update, Russell addressed a critical access issue by correcting the Terraform AWS IAM policy to reference the precise cica-tempus database ARN, thereby tightening access controls and ensuring reliable data ingestion. His work demonstrated careful attention to policy correctness, operational risk reduction, and traceable, governance-friendly infrastructure changes.