Systems Administrator, Senior (Linux/Windows)
AMERICAN SYSTEMSRole Overview
AMERICAN SYSTEMS is hiring a Systems Administrator, Senior (Linux/Windows). This is a full-time role in Arlington. Part of AMERICAN SYSTEMS's Security hiring. Full responsibilities, required qualifications, and the apply link are listed in the description below.
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Job Description
Overview
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!
Responsibilities
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
Qualifications
- 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
Pay Transparency Statement
AMERICAN SYSTEMS is committed to pay transparency for our applicants and employee-owners. The salary range for this position is USD $110,800.00/Yr. - USD $185,100.00/Yr. Actual compensation will be determined based on several factors permitted by law. AMERICAN SYSTEMS provides for the welfare of its employees and their dependents through a comprehensive benefits program by offering healthcare benefits, paid leave, retirement plans, insurance programs, and education and training assistance.
EEO Statement
EEO Race/Sex/Disability Status/Veteran Status
Frequently Asked Questions
How do I apply for the Systems Administrator, Senior (Linux/Windows) position at AMERICAN SYSTEMS?
Use the Apply button above to submit your application directly to AMERICAN SYSTEMS. Most applications take less than 5 minutes if your resume and contact details are ready, and you'll be routed to the employer's official application system to finish.
Where is the Systems Administrator, Senior (Linux/Windows) position at AMERICAN SYSTEMS located?
This position is based in Arlington. AMERICAN SYSTEMS has not indicated remote or hybrid options for this role, so candidates should plan for on-site work.
What does a Systems Administrator, Senior (Linux/Windows) at AMERICAN SYSTEMS earn?
AMERICAN SYSTEMS has not disclosed a salary range in this posting. Many employers share specifics later in the interview process; you can also ask during a recruiter screen if compensation transparency is important to you.
When was the Systems Administrator, Senior (Linux/Windows) role at AMERICAN SYSTEMS posted?
This role was posted on April 28, 2026 (51 days ago). It's still listed as actively hiring; we re-confirm openings against the source system multiple times per day and remove closed roles.
How much experience does the Systems Administrator, Senior (Linux/Windows) role at AMERICAN SYSTEMS require?
This is a senior-level position. Most senior roles call for 5+ years of directly relevant experience. AMERICAN SYSTEMS lists their specific requirements in the description below, so review the must-have qualifications closely before applying.
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