Senior Systems Administrator
About The Position
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. 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. Position is performed at the customer site in St. Louis, MO. Clearance Level Required: Active Top Secret/SCI with the ability to successfully pass a Polygraph examination.
Requirements
- US citizenship is required per contract.
- 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.
- 8+ years of enterprise systems administration experience.
- Experience supporting mission-critical DoD or Intelligence Community environments.
- Strong administration experience with: Microsoft Windows Server, Red Hat Enterprise Linux (RHEL), VMware vSphere, Active Directory, DNS/DHCP, Group Policy.
- Experience with scripting and automation using PowerShell, Bash, or Python.
- Experience implementing and maintaining STIG compliance.
- Knowledge of RMF security controls and vulnerability remediation.
- Strong troubleshooting and analytical skills.
- Must have a Security+ CE or higher DoD 8570/8140 certification
Nice To Haves
- Experience supporting customer mission systems.
- Experience supporting GEOINT applications.
- Experience with: Ansible, VMware vCenter, SCCM/MECM, Splunk, Elastic Stack, Git, ServiceNow.
- Red Hat Certified Systems Administrator (RHCSA)
- Microsoft Certified: Windows Server Hybrid Administrator Associate
- ITIL Foundation Certification
Responsibilities
- Administer, maintain, and support the application with the customer enterprise.
- Perform installation, configuration, patching, upgrades, and lifecycle management of Windows and Linux servers.
- Monitor system health, performance, and availability using enterprise monitoring tools.
- Troubleshoot complex hardware, software, operating system, and application issues.
- Support deployment activities across development, test, staging, and production environments.
- Coordinate scheduled maintenance windows and execute system upgrades with minimal operational impact.
- Develop and maintain automation scripts using PowerShell, Bash, or Python to improve operational efficiency.
- Perform backup, recovery, and disaster recovery operations.
- Support accreditation activities and ensure compliance with customer, DoD, RMF, DISA STIG, and security requirements.
- Manage user accounts, permissions, and Active Directory integrations.
- Collaborate with security teams to remediate vulnerabilities and maintain compliance.
- Support incident response, root cause analysis, and corrective action implementation.
- Document system configurations, standard operating procedures, and technical documentation.
- Participate in on-call rotation and provide after-hour support when required.
- Interface directly with customer to address operational tasking and mission requirements.
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What This Job Offers
Job Type
Full-time
Career Level
Senior
