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 teams 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. Locations Gaithersburg, MD Aurora, CO St. Louis, MO Tucson, AZ Clearance Level Required Active Top Secret to be considered with the ability to obtain TS/SCI with Polygraph. Primary Responsibilities 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, PowerShell, 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. Basic Qualifications US citizenship is required per contract. Bachelors degree in Computer Science, Engineering, Information Technology, or related discipline and 8?12 years of prior relevant experience or Masters 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 GovCloud, 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, PowerShell, 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. Preferred Qualifications Experience supporting our customer or GEOINT missions. Familiarity with DevOps tools and pipelines (Git, Jenkins, Docker, etc.). Knowledge of enterprise backup solutions, DNS, DHCP, Active Directory, and PKI. Chinook Original Posting January 15, 2026 Pay Range $92,300.00 $166,850.00 About Leidos 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 $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com. Pay and Benefits Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits. Securing Your Data Beware of fake employment opportunities using Leidos name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com. If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission (https://reportfraud.ftc.gov/#/). Commitment to Non-Discrimination All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws. #J-18808-Ljbffr