Position Description:
Seeking an experienced Cloud Systems Administrator to join our SITE III Directorate Operations (DO) team supporting the U.S. Intelligence Community. Your efforts will ensure robust, reliable intelligence collection and dissemination, supporting defense intelligence, combatant commands, partner nations, and federal agencies.
Position Duties:
• Ensure optimal operation of multi-user computer systems, collaborating with network engineers and software developers.
• Manage system resources to enhance CPU and disk efficiency and responsiveness.
• Administer system security, setting up user accounts and profiles, and ensuring compliance with the latest standards.
• Provide comprehensive support, from Tier 1 troubleshooting to Tier 2 problem resolution.
• Optimize system performance, oversee software installations, and manage storage solutions.
• Evaluate new technologies and make recommendations on hardware and software acquisitions.
• Ensure rigorous application of security settings and conduct regular security assessments.
• Manage Unix and Linux environments and be familiar with their configuration.
• Proficient in scripting and setting up systems from scratch, including application installations.
• Knowledgeable in security protocols, able to resolve vulnerabilities and run Security Technical Implementation Guides (STIGs).
Required Clearance:
Must possess an active TS/SCI or SCI eligibility and active polygraph or ability to obtain a polygraph. This requires US citizenship.
Required Skills, Education, and Experience:
• Full time work in a SCIF is required, but hours are flexible. Should be available during core business hours. Some mission critical applications would require availability after hours and during weekends should the need arise.
• A Bachelor’s degree in an area applicable to the position with 8+ years of relevant experience OR a Master’s degree in an area applicable to the position with 6 years of relevant experience; an additional 4 years of experience maybe considered in lieu of a degree requirement
• Security+ or other IAT II/III level certification that is currently active (DoD 8570 compliance)
• Linux (CentOS, RHEL, and/or Oracle). This position requires strong Linux skills with current/very recent experience.
• Experience working in an AWS environment and familiarity with console accesses to provision, maintain and monitor servers.
• Performing snapshots, backups, disaster recovery, performance tuning
Installation, STIG hardening, patching
• Excellent troubleshooting skills (including scripting and audit log review) and Tier 1 communication skills
Desired Qualifications:
• Experience developing and maintaining critical documentation (SIPs, SAGs, SUMs, SOPs, Getting started guides)
• Experience with ElasticSearch
• Current polygraph
• Cloud (EC2s, S3, Elasticache), Kafka, Openshift, Docker, Keycloak, Wildfly
• PKI certificates, SSL, service accounts
• Maintaining multiple environment types (physical, virtual, cloud)
• Experience supporting security audits and testing events.
• Experience upgrading from CentOS to RHEL 8 is a nice to have but not a must as long as candidates have strong Linux experience.
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:February 23, 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
- Active TS/SCI or SCI eligibility and active polygraph or ability to obtain a polygraph; US citizenship required.
- Full-time work in a SCIF (on-site) with availability during core hours and occasional after-hours/weekend support.
- Bachelor's degree with 8+ years relevant experience OR Master's with 6 years relevant experience (or additional 4 years experience in lieu of degree).
- Current Security+ or equivalent IAT II/III level certification (DoD 8570 compliance).
- Strong, current/very recent Linux skills (CentOS, RHEL, Oracle Linux) and Unix environment management.
- Experience working in AWS environments and familiarity with console access to provision, maintain, and monitor servers.
- Experience with snapshots, backups, disaster recovery, performance tuning, installation, STIG hardening, and patching.
- Excellent troubleshooting skills including scripting and audit log review; Tier 1 communication and Tier 2 problem resolution skills.
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.
