Senior Systems Administrator - Vulnerability Remediation

Leidos is seeking a Senior Systems Administrator to lead vulnerability remediation and system hardening for a primarily Windows-based enterprise. You will coordinate with the INFOSEC team, implement remediation actions, and help maintain ATO and system accreditation. This Windows-heavy role benefits from Linux familiarity and requires Top Secret/SCI w/Poly, a degree, and extensive client/server experience. The position emphasizes proactive ownership and cross-team collaboration in Chantilly, VA.