Systems Administrator

Are you passionate about solving complex technical challenges in support of national security? Leidos is seeking a Senior Systems Administrator to join our high-performing team on the Chinook Program, supporting our Intelligence Community customer. In this mission-critical role, you’ll be at the forefront of maintaining and enhancing the application ensuring the reliability, security, and performance of systems that directly enable intelligence operations.

• Bachelor’s degree in Information Technology, Computer Science, Engineering, or related field and 8-12 years of prior relevant experience or Master’s with 6-10 years of prior relevant experience.\n
• 8+ years of enterprise systems administration experience.\n
• Experience supporting mission-critical DoD or Intelligence Community environments.\n

• Strong administration experience with:\n \n

• Microsoft Windows Server\n
• Red Hat Enterprise Linux (RHEL)\n
• VMware vSphere\n
• Active Directory\n
• DNS/DHCP\n

• Group Policy\n \n

• Experience with scripting and automation using PowerShell, Bash, or Python.\n
• Experience implementing and maintaining STIG compliance.\n
• Knowledge of RMF security controls and vulnerability remediation.\n
• Strong troubleshooting and analytical skills.\n
• Must have a Security+ CE or higher DoD 8570/8140 certification\n

n As a trusted technical expert, you’ll work alongside talented engineers, cybersecurity professionals, and customer stakeholders to deliver innovative solutions, optimize enterprise infrastructure, and keep mission-essential capabilities operating at peak performance. If you thrive in a fast-paced, collaborative environment where your expertise has a tangible impact, this is an opportunity to contribute to work that truly matters.\n \n Position is performed at the customer site in St. Louis, MO.\n \n \nClearance Level Required:\n \n Active Top Secret/SCI with the ability to successfully pass a Polygraph examination.\n \n \nPrimary Responsibilities:\n \n \n

• Administer, maintain, and support the application with the customer enterprise.\n
• Perform installation, configuration, patching, upgrades, and lifecycle management of Windows and Linux servers.\n
• Monitor system health, performance, and availability using enterprise monitoring tools.\n
• Troubleshoot complex hardware, software, operating system, and application issues.\n
• Support deployment activities across development, test, staging, and production environments.\n
• Coordinate scheduled maintenance windows and execute system upgrades with minimal operational impact.\n
• Develop and maintain automation scripts using PowerShell, Bash, or Python to improve operational efficiency.\n
• Perform backup, recovery, and disaster recovery operations.\n
• Support accreditation activities and ensure compliance with customer, DoD, RMF, DISA STIG, and security requirements.\n
• Manage user accounts, permissions, and Active Directory integrations.\n
• Collaborate with security teams to remediate vulnerabilities and maintain compliance.\n
• Support incident response, root cause analysis, and corrective action implementation.\n
• Document system configurations, standard operating procedures, and technical documentation.\n
• Participate in on-call rotation and provide after-hour support when required.\n
• Interface directly with customer to address operational tasking and mission requirements.\n