Linux Systems Administrator with Security Clearance

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