Linux Systems Administrator, Senior

AMERICAN SYSTEMS, a 100% employee-owned federal government contractor, is seeking a Senior Linux Systems Administrator with an active Secret clearance to support a mission-critical classified program at Naval Surface Warfare Center Crane Division, IN.

This role supports a secure, closed Linux enclave responsible for protecting and recovering highly sensitive mission data. The ideal candidate brings strong Red Hat Linux experience, enterprise system administration skills, and a desire to grow within a high-trust, technically complex environment.

As a Senior Linux Systems administrator with AMERICAN SYSTEMS, you will have the opportunity to:

Support on-premises Production and Development Linux infrastructure and applications.
• Provide Tier II support for production and development environments, managing ticket submission and tracking.
• Monitor resource availability to meet customer requirements, ensuring sufficient hardware, software, and throughput.
• Review and optimize system performance to ensure peak efficiency and reliability for mission-critical applications.
• Analyze system resource usage and apply corrective actions when necessary.
• Review system and application logs, ensuring completion of scheduled tasks and backups.
• Create and manage user accounts, groups, and permissions; maintain local repositories.
• Perform interface administration, including sFTP, SFG, and shell scripting.
• Develop and maintain administrative scripts (e.g., BASH, Python) for system maintenance.
• Document and implement system administration solutions to meet business requirements.
• Provide project status updates, problem resolution, and system administration reports to management.
• Coordinate problem resolution with customers, team members, and vendors as needed.
• Assess and recommend improvements for system software and hardware to enhance efficiency and functionality.
• Collaborate with the Cybersecurity team to implement, monitor, and maintain cybersecurity compliance and vulnerability mitigations.
• Be entrusted with mentoring and/or training less experienced staff as part of team development efforts.

• Active Secret clearance w/SCI eligibility
• Bachelor's degree in a STEM discipline or 4 additional years of relevant experience in lieu of a degree.
• 5-7 years of relevant IT / Linux Systems Administration experience, including knowledge of containerization (Podman/Docker), Ansible, and OpenLDAP.
• Current DoD 8140 IAT level II certification (e.g., Security+ CE)
• Scripting skills in BASH and/or Python.
• Experience with VMware vSphere (version 7 or above).
• Familiarity with PostgreSQL databases.
• Must obtain a Red Hat Linux or comparable Linux Server OS certification (e.g., RHCSA or RHCE) within six months of hire.
• Candidates who currently possess active Red Hat certifications may be considered favorably during the selection process.