System Administrator, VI SME – TS/SCI Required

Manage and secure a large virtual infrastructure environment, providing day-to-day systems administration for 300+ virtual machines across multiple security classifications. Maintain and harden operating systems and applications while ensuring STIG compliance and DoD PKI integration. Monitor security/performance logs, handle ServiceNow ticket workflows, perform backup/restore, and support COOP/VOE continuity with occasional after-hours and weekend coverage.