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, 2026For 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.
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.
Skills Required
- Bachelor's degree with 12+ years relevant experience or Master's degree with 10+ years (or equivalent experience)
- Active TS/SCI security clearance
- Active CompTIA Security+ (or higher) certification
- Active Red Hat Certified System Administrator certification
- Proficiency in Linux system administration (Red Hat)
- Experience using PostgreSQL through the command line
- Experience applying STIGs, security updates, and addressing IAVAs
- Experience administering virtualization and container infrastructure
- Strong written and verbal communication skills and ability to manage multiple priorities
Leidos Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Leidos and has not been reviewed or approved by Leidos.
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Healthcare Strength — Healthcare coverage is described as comprehensive, with multiple plan options, low office-visit copays in some plans, and access to mental health and wellness support tools. The availability of HSA/FSA options and employer contributions is positioned as a meaningful part of the total package.
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Retirement Support — Retirement benefits are framed as a strong component of total rewards, highlighted by a 401(k) match and immediate vesting in the standard package. The Employee Stock Purchase Plan is also presented as an additional long-term wealth-building feature.
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Wellbeing & Lifestyle Benefits — Wellbeing and lifestyle supports extend beyond core insurance, including wellness programs, fitness-related stipends, and assistance resources. Work flexibility and related perks are also included as part of the broader rewards experience.
Leidos Insights
What We Do
We Are Leidos For 50 years we have been tackling some of the biggest problems that face our nation and our world. OUR MISSION Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020. Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®. Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos. Your most important work is ahead.
