Lead Systems Administrator – Linux/Windows

AMERICAN SYSTEMS

Lead Systems Administrator focusing on Linux and Windows infrastructure for federal programs. Requires Top Secret clearance and extensive IT systems admin experience.

Posted 6/19/2026full-timeArlington • Virginia • 🇺🇸 United StatesSenior💰 $150,000 - $175,000 per yearWebsite

Tech Stack

Tools & technologies

AnsibleCloudCyber SecurityDNSDockerLinuxOracleVMware

About the role

Key responsibilities & impact

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

Requirements

What you’ll need

Active TOP SECRET clearance with SCI eligibility required
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)
Strong CLI and Bash scripting experience

Benefits

Comp & perks

healthcare benefits
paid leave
retirement plans
insurance programs
education and training assistance

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Linux administrationWindows administrationvSphereDNS administrationBash scriptingContainerizationAnsibleVirtualizationOracle databaseSystem performance optimization

Soft Skills

Problem-solvingAnalytical skillsAttention to detailCommunicationTeam collaboration

Certifications

TOP SECRET clearanceDoD 8140 IAT Level IISecurity+ CE