You will execute automated and manual vulnerability scans, enforce DISA Security Technical Implementation Guides (STIGs), coordinate IAVA patch management, remediate security findings, and author technical justification artifacts supporting the DHA ECS triennial Authority to Operate (ATO) under the DoD Risk Management Framework (RMF). Serve as the dedicated Database Security Specialist embedded with the DBA team, ensuring that security policies, access controls, and patch routines are uniformly applied across all DHA ECS Oracle database instances (OFF, EDW, PRISM, MTR/PAT, ECCP) across all operating environments (Development, System Test, QA/Pre-Prod, Benchmark, and Production).