Sr. Systems Administrator (Linux)

Amentum is seeking a Sr. Systems Administrator (Linux) to oversee and manage enterprise-level Linux infrastructure in support of U.S. Navy operations within a Department of Defense environment. This role requires deep technical expertise in Linux systems, leadership in secure system administration, and a strong working knowledge of Risk Management Framework (RMF) and NIST SP 800-53 controls. The ideal candidate will demonstrate the ability to lead teams, manage complex environments, and ensure cybersecurity compliance across classified and unclassified networks.