Senior Principal System Administrator

Summary

Senior Principal System Administrator responsible for managing and maintaining a classified development and integration test environment, including Windows and Red Hat Enterprise Linux servers, VMware virtualization infrastructure, and network hardware. The role requires strong Linux and Windows Server administration expertise, cybersecurity compliance knowledge (DISA STIGs, Nessus, PKI), and experience supporting classified networks. Responsibilities include patching workflows, ePO/McAfee integration, vulnerability scanning, system accreditation support, and maintaining DoD-mandated security posture; some after-hours support for maintenance and incident response required.