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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Linux Systems Administrator - **Company:** Science Applications International Corporation - **Location:** Chantilly, VA, United States - **Salary:** $180,001 - $220,000 - **Contract:** Permanent contract - **Skills:** Active Directory, Systems Engineering, Configuration Management, System Configuration, Dynamic Host Configuration Protocol, Desktop Computing, Linux, Domain Name System (DNS), Linux Security Modules, Windows Servers, Network Service, Role-Based Access Control, Red Hat Enterprise Linux, Ansible, VCloud, Virtualization Technology, VMware VSphere, Scripting, System Availability, Infrastructure Automation Frameworks, Performance Monitor, CIS Benchmarks, Puppet, Vmware - **Published:** November 11, 2026 - **Apply:** https://www.clearancejobs.com/jobs/9307333/linux-systems-administrator ## About the Role * Experience providing systems administration support within mixed Microsoft Windows and Red Hat Enterprise Linux (RHEL) environments * Hands-on experience installing, configuring, administering, and troubleshooting Linux operating systems * Experience monitoring Linux infrastructure health, performance, and availability, and proactively resolving issues * Experience troubleshooting and resolving application, infrastructure, connectivity, and security issues in on-premises environments * Experience diagnosing and remediating server performance issues involving CPU, memory, storage, and system resources * Experience implementing Linux security hardening using CIS Benchmarks and/or STIG requirements Experience maintaining local repositories and performing system patching, updates, and lifecycle management activities * Experience supporting VMware vSphere and/or VMware Cloud Foundation (VCF) environments * Experience performing general systems administration and infrastructure support tasks across multiple technology platforms * Experience collaborating with infrastructure and systems engineering teams to support enterprise environments * Experience administering Microsoft infrastructure services, including Active Directory, DNS, DHCP, and related network services * Experience supporting desktop and workstation hardware * Experience implementing and managing Role-Based Access Control (RBAC) within multi-tenant environments * Experience developing or maintaining automation through scripting * Ability to support multiple priorities in a dynamic enterprise IT environment, * Red Hat Certified System Administrator (RHCSA) and/or Red Hat Certified Engineer (RHCE) certification * Experience with Ansible, Puppet, or similar configuration management and automation tools * Working knowledge of Windows 11, Windows Server, VMware vCenter Server Appliance (VCSA), and VMware Cloud Foundation (VCF) * Working knowledge of enterprise infrastructure hardware, appliances, and supporting technologies * Experience performing Windows Server installation, configuration, patching, upgrades, migrations, and ongoing administration * Experience supporting enterprise virtualization, server infrastructure, and hybrid technology environments ## Description Join a team that powers critical infrastructure and keeps mission-essential systems running securely, efficiently, and reliably. SAIC is seeking a skilled Linux Systems Administrator who thrives in complex enterprise environments and enjoys solving challenging technical problems across Linux, virtualization, and infrastructure platforms. In this role, you'll be a key member of the systems engineering team, responsible for the health, performance, security, and lifecycle management of our Linux-based infrastructure. You'll work with modern virtualization technologies, support enterprise-scale environments, implement automation, and help drive continuous improvement across our server and infrastructure ecosystem. What You'll Do: * Administer and maintain enterprise Linux environments, with a primary focus on Red Hat Enterprise Linux (RHEL) * Ensure system availability, performance, and security through proactive monitoring, troubleshooting, patching, and upgrades * Support and manage VMware vSphere and VMware Cloud Foundation (VCF) infrastructure * Implement and maintain security best practices, including CIS and STIG hardening standards * Troubleshoot and resolve infrastructure, application, operating system, connectivity, and security issues across on-premises environments * Monitor and optimize system resources including CPU, memory, storage, and overall server performance * Manage local repositories and coordinate operating system patching and lifecycle activities * Collaborate with infrastructure and systems teams on architecture, deployment, and operational initiatives * Develop and enhance automation through scripting and configuration management tools * Support Microsoft-based services and technologies, including Active Directory, DNS, DHCP, and related infrastructure components * Contribute to ongoing modernization efforts and continuous improvement across the enterprise technology stack