Linux Systems Administrator

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 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

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

About UsSAIC® is a premier mission integrator focused on advancing the power of technology and innovation to serve and protect our world. Our robust portfolio of offerings across the defense, space, intelligence, and civilian markets includes secure high-end solutions in mission IT, enterprise IT, engineering services, and professional services. We integrate emerging technology, rapidly and securely, into mission critical operations that modernize and enable critical national imperatives.