Senior Systems Administrator

Description

Leidos National Security Sector combines technology-enabled services and mission software capabilities in the areas of cyber, logistics, security operations, and decision analytics to support our defense and intel customers’ mission to defend against evolving threats around the world. Our team’s focus is to ensure our customers have the right tools, technologies, and tactics to keep pace with an ever-evolving security landscape and succeed in their pursuit to protect people and critical assets.

The Intelligence Production Solutions Division (IPSD), part of the Decision Advantage Solutions Business Area, is currently seeking a Senior Systems Administrator. As a senior member of our IT operations team, you will play a key role in managing, securing, and optimizing high-performance, mission-critical systems that directly affect our customers’ intelligence and geospatial initiatives.

This position requires deep technical expertise, proactive leadership, and the ability to work independently and collaboratively in a fast-paced, classified environment. You will lead systems operations, mentor junior admins, and ensure availability, reliability, and security of infrastructure supporting geospatial analytics, software development, and data services.

• Gaithersburg, MD
• Aurora, CO
• St. Louis, MO
• Tucson, AZ

Active Top Secret to be considered with the ability to obtain TS/SCI with Polygraph.

• Lead system administration for Linux and Windows-based systems in secure, mission‑critical environments.
• Architect and manage complex server, storage, and virtualization infrastructure (VMware, KVM).
• Perform OS installation, configuration, hardening, and patching in compliance with DoD STIGs and agency policies.
• Monitor and tune system performance, conduct root cause analysis, and resolve complex issues quickly and efficiently.
• Support backup/recovery strategies, disaster recovery plans, and continuity of operations.
• Oversee and maintain automation scripts and infrastructure as code (Ansible, Power Shell, Bash, etc.).
• Maintain system documentation, configuration baselines, and support CM and RM activities.
• Lead and support deployment of system enhancements and modernization initiatives for the Chinook program.
• Collaborate with cybersecurity, network engineering, and software development teams to ensure system compliance and performance.
• Participate in security audits, incident response, and operational readiness activities.

• US citizenship is required per contract.
• Bachelor’s degree in Computer Science, Engineering, Information Technology, or related discipline and 8‑12 years of prior relevant experience or Master’s with 6‑10 years of prior relevant experience.
• Active Top Secret to be considered with the ability to obtain TS/SCI with Polygraph.
• DoD 8570 IAT Level II or III certification (e.g., Security+ CE, CASP+, CISSP).
• Experience with cloud platforms (AWS Gov Cloud, Azure Government) and hybrid cloud environments.
• Experience with Linux (Red Hat Enterprise Linux or CentOS) and Windows Server platform system administration.
• Proficiency with virtualization platforms (VMware, KVM) and management tools.
• Experience with automation and scripting (Ansible, Bash, Power Shell, Python).
• Familiarity with STIG compliance, system hardening, ACAS scans, and RMF processes.
• Strong understanding of enterprise networking, identity/access management, and storage concepts.
• Proven ability to troubleshoot, document, and lead systems‑related projects independently.
• Experience supporting IC or DoD classified environments.

• Experience supporting our customer or GEOINT missions.
• Familiarity with Dev Ops tools and pipelines (Git, Jenkins, Docker, etc.).
• Knowledge of enterprise backup solutions, DNS, DHCP, Active Directory, and PKI.

January 15, 2026

$92,300.00 – $

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately…