Senior Windows Systems Administrator – On-Site, Security

S2i2 is seeking a Senior Systems Administrator to lead critical Windows environments for a DoD program. You will oversee daily operations, drive process improvements, and mentor a team to ensure mission-critical IT stability and security.

Responsibilities include patching, STIG/ACAS remediation, AD/GP management, performance monitoring, and PowerShell automation across NIPR and SIPR networks, both on-prem and cloud.