Linux Systems Administrator

Science Applications International Corp.; Chantilly (VA); On-site; USD 180,000 - 220,000; Full time

Job summary

SAIC seeks a skilled Linux Systems Administrator to maintain enterprise Linux environments, primarily RHEL, and to support virtualization, security, and automation across on-premises infrastructure in Chantilly, Virginia. You will work with VMware vSphere/VCF, apply CIS/STIG hardening, and drive improvements in server lifecycle management.

You will collaborate with cross-functional teams to implement automation, manage Active Directory and related Microsoft services, and ensure system

Qualifications

• Experience administering mixed Windows and Red Hat Enterprise Linux (RHEL) environments.
• Hands-on Linux installation, configuration, administering, and troubleshooting.
• Experience monitoring Linux infrastructure health, performance, and availability.
• 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 RBAC within multi-tenant environments.
• Experience developing or maintaining automation through scripting.
• Ability to support multiple priorities in a dynamic enterprise IT environment.

Responsibilities

• 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.

Skills

RHEL administration

VMware

Windows Server & Active Directory

Security hardening

Automation scripting

Patch management

RBAC in multi-tenant env

Tools

VMware vSphere

VCF

Ansible

Puppet

VCSA

Job description

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

Qualifications

• 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 requirementsExperience 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

Preferred Qualifications:

• 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

Target salary range: $180,001 - $220,000. The estimate displayed represents the typical salary range for this position based on experience and other factors.

SAIC is a premier technology integrator, solving our nation's most complex modernization and systems engineering challenges across the defense, space, federal civilian, and intelligence markets. Our robust portfolio of offerings includes high-end solutions in systems engineering and integration; enterprise IT, including cloud services; cyber; software; advanced analytics and simulation; and training. We are a team of 23,000 strong driven by mission, united purpose, and inspired by opportunity. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $6.5 billion. For more information, visit saic.com. For information on the benefits SAIC offers, see Working at SAIC. EOE AA M/F/Vet/Disability