Systems Administrator, Senior- Red Hat Linux & Windows (Top Secret w/SCI eligibility)
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Before you apply
Salary$150k – $175k
LocationWashington, DC, US
Work modeon-site
Typefull-time
SenioritySenior
Experience8–10 yrs
DepartmentIT / Cyber Security / Network Systems
Company size1,001–5,000 people
PostedOct 9, 2026 · 3w ago
Verified live1d ago
At a glanceSummarised by Seekless from the posting.
Active TOP SECRET clearance with SCI eligibility
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
3-5 years of Linux CLI 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 DoW cybersecurity standards
Knowledge of containerization (Docker/Podman), Ansible for automation, and OpenLDAP
Experience with virtualization (VMware)
Strong CLI and Bash scripting experience
U.S. Citizenship Required for the purposes of obtaining/holding a U.S. security clearance
Skills
Red Hat Linux
Windows
vSphere
RHEL
Linux CLI
Oracle database
Bash
DNS
Docker
Podman
Ansible
OpenLDAP
VMware
STIGs
RMF
Benefits
Health insurance
Paid leave
Retirement plans
Education assistance
Sign on bonus
Overview
AMERICAN SYSTEMS, a 100% employee-owned federal contracting company, is seeking a Senior Systems Administrator with strong Red Hat Linux CLI and Windows administration experience to support a Special Access Program in Washington, DC.
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 Sr. Systems Administrator, you will:
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Support on-premises Linux (80%) and Windows (20%) infrastructure and applications.
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Support on-premises vSphere infrastructure across multiple datacenters.
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Provide Tier III support for production and development environments, managing ticket submission and tracking.
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Monitor resource availability to meet customer requirements, ensuring sufficient hardware, software, and throughput.
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Review and optimize system performance to ensure peak efficiency and reliability for mission-critical applications
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Analyze system resource usage and apply corrective actions when necessary
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Review system and application logs, ensuring completion of scheduled tasks and backups
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Create and manage user accounts, groups, and permissions; maintain local repositories in a RHEL-based environment
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Support on-prem and remote Linux-based Oracle database appliances
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Develop and maintain administrative bash scripts for system maintenance and automation
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Proficient in DNS administration
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Document and implement system administration solutions to meet business requirements
Qualifications
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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 CLI 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 DoW cybersecurity standards
•
Knowledge of containerization (Docker/Podman), Ansible for automation, and OpenLDAP
•
Experience with virtualization (VMware)
•
Strong CLI and Bash scripting experience
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 $150,000.00/Yr. - USD $175,000/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