Senior Systems Administrator

Description Senior System Administrator Alexandria, VA Leidos is hiring a Senior System Administrator to support Red Hat systems operating within the Army Cloud Computing Enterprise Transformation (AC2SP) on both unclassified and classified networks in Alexandria, VA. This position plays a critical role in maintaining secure, reliable, and high performing environments that support mission operations. The selected candidate will provide system administration for Red Hat environments, perform daily health checks on classified systems, troubleshoot software and PostgreSQL database issues using the command line, maintain software packages for transfer between unclassified and classified environments, update production, training, and development systems, and support security initiatives through deep system knowledge. Access to classified systems requires onsite support at the Alexandria, VA office. The role also includes providing remote system administration, updates, and troubleshooting support for remote systems. Primary Responsibilities Provide Tier I, II, and III infrastructure support. Provide technical systems engineering and system administration support. Identify, analyze, and document problems related to program functionality and user interfaces. Ensure the architecture and design of DoD information systems remain functional and secure. Implement security best practices and initiatives across all levels of the infrastructure. Administer and maintain virtualization and container infrastructure, including daily system health checks, application of Security Technical Implementation Guides (STIGs), security updates, and hotfixes to address Information Assurance Vulnerability Alerts (IAVAs). Provide broad spectrum user support, including identifying and responding to customer requirements with a focus on quality assurance, customer satisfaction, help desk functions, and related support activities. Assist with defining DevSecOps best practices for application development teams and support their adoption of these processes. Develop, maintain, and improve real time monitoring and metrics for production environments to enable early issue detection and maintain system quality. Assist with developing and implementing DevSecOps process automation and tooling that establishes standards while enabling application development teams to independently support infrastructure and deployment needs within ODIN or its successor. Support the build, maintenance, enhancement, and updates of the CI/CD pipeline (ODIN or its successor) for delivering new features, fixes, and system updates across development, integration, and production environments. Perform release management support and maintain a continuous testing suite to validate deliverables and ensure quality. Operate, maintain, and support production systems and applications to ensure they remain accessible and available. Recommend operational efficiencies and implement approved improvements in coordination with government stakeholders. Leverage external and internal cloud services, including elastic capacity auto scaling, elastic load balancing, right sizing, disaster recovery strategies, and tiered storage. Assist with DevSecOps processes and tools that support Agile application development teams through continuous integration, testing, and deployment. Basic Qualifications Bachelor's degree with 12+ years of relevant experience, or a Master's degree with 10+ years of relevant experience. Additional related experience may be considered in lieu of a degree. Active TS/SCI security clearance. Active CompTIA Security+ (or higher) certification. Active Red Hat Certified System Administrator certification. Proficiency in Linux system administration. Experience using PostgreSQL through the command line. Excellent written and verbal communication skills with the ability to manage multiple priorities and deadlines. Preferred Qualifications Experience supporting AWS cloud environments. AMSOPP1 If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares. Original Posting July 31, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. Pay Range Pay Range $116,350.00 - $210,325.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law. 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 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 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 View email address on click.appcast.io. 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. 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