Systems Administrator, Senior (Linux/Windows)

AMERICAN SYSTEMS, a 100% employee-owned federal contracting company, is seeking a Senior Systems Administrator with Linux and Windows administration experience to support a Special Access Program, operating in highly secure, complex environments where precision and reliability are essential.

This role focuses on owning and optimizing enterprise Linux & Windows infrastructure across multiple datacenters, partnering with cybersecurity and engineering teams, and providing Tier III support for systems that cannot fail.

Role includes a $5,000 sign-on bonus in addition to a generous compensation package!

As a Senior Systems Administrator, you will:

• Support on-premises Linux (60%) and Windows (40%) infrastructure and applications.
• Support on-premises vSphere infrastructure across multiple datacenters.
• Provide Tier III 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 in a Linux-based environment
• Support on-prem and remote Linux-based Oracle database appliances
• Develop and maintain administrative bash scripts for system maintenance and automation
• Proficient in DNS administration
• 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

• Active TOP SECRET clearance with SCI eligibility required; Program Access Request (PAR) submission required after hire
• Bachelor’s degree in a STEM discipline (or additional years of relevant experience considered in lieu of degree)
• 8-10 years of IT Systems Administration that includes 3-5 years of Linux administration 
• DoD 8140 IAT Level II cert (e.g., Security+ CE or equivalent)
• Experience designing and maintaining secure, scalable cloud/on-prem platforms (IL5–IL6+)
• Knowledge of STIGs, RMF, and DoD cybersecurity standards
• Knowledge of containerization (Docker/Podman), Ansible for automation, and OpenLDAP
• Experience with virtualization (VMware)  
• Familiar with CLI and Bash scripting

NOTE:U.S. Citizenship Required for the purposes of obtaining/holding a U.S. security clearance