Senior Information System Security Engineer (ISSE)

Vista Global Solutions is seeking a Senior Information System Security Engineer to support the migration and enterprise implementation of Microsoft Defender across Windows, macOS, and Linux environments at the Uniformed Services University of the Health Sciences. The role serves as a key cybersecurity engineering and compliance resource, ensuring endpoint security controls and transition activities align with Department of Defense cybersecurity requirements and DISA Security Technical Implementation Guides. The position involves performing STIG assessments, validating compliance, and supporting the Risk Management Framework lifecycle for enterprise deployment.