Linux Systems Administrator

SAIC•Chantilly, VA

11h

About The Position

SAIC is seeking a Linux Systems Administrator to support critical infrastructure and mission-essential systems in complex enterprise environments. The role is part of the systems engineering team and is responsible for the health, performance, security, and lifecycle management of Linux-based infrastructure. The administrator will work with virtualization technologies, support enterprise-scale environments, implement automation, and contribute to continuous improvement across the server and infrastructure ecosystem. The position focuses primarily on Red Hat Enterprise Linux (RHEL), with support for VMware vSphere and VMware Cloud Foundation (VCF), Microsoft infrastructure services, and on-premises systems. It includes monitoring and troubleshooting systems, applying security hardening and patches, managing repositories and lifecycle activities, and collaborating with infrastructure and systems teams on architecture, deployments, and operations.

Requirements

Experience providing systems administration support in 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 other 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.
Experience supporting VMware vSphere and/or VMware Cloud Foundation (VCF) environments.
Experience performing general systems administration and infrastructure support across multiple technology platforms.
Experience collaborating with infrastructure and systems engineering teams in 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) in multi-tenant environments.
Experience developing or maintaining automation through scripting.
Ability to support multiple priorities in a dynamic enterprise IT environment.

Nice To Haves

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.

Responsibilities

Administer and maintain enterprise Linux environments, primarily Red Hat Enterprise Linux (RHEL).
Monitor and maintain system availability, performance, and security through proactive monitoring, troubleshooting, patching, and upgrades.
Support and manage VMware vSphere and VMware Cloud Foundation (VCF) infrastructure.
Implement security best practices, including CIS and STIG hardening standards.
Troubleshoot and resolve infrastructure, application, operating system, connectivity, and security issues in on-premises environments.
Monitor and optimize 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 using scripting and configuration management tools.
Support Microsoft services and technologies, including Active Directory, DNS, DHCP, and related infrastructure components.
Contribute to enterprise technology modernization and continuous improvement efforts.