Qiang Zhou focused on security hardening for the legacy SQL environment within the hmcts/dlrm-data-ingest-infra repository, addressing a critical vulnerability by disabling public access and consolidating configuration across multiple files. Using Infrastructure as Code principles and Terraform, Qiang reverted public IP settings in HCL, ensuring the data ingest infrastructure maintained a secure baseline without disrupting existing services. The approach emphasized centralized, traceable changes that reduced the attack surface and supported ongoing compliance. Qiang validated the updates through configuration reviews, demonstrating a methodical and detail-oriented process that improved the security posture of the pipeline while maintaining operational continuity.