Senior System/Network Administrator – Systems Integration

Leidos LLC; Maryland; On-site; USD 116,000 - 210,000; Full time

Job summary

Leidos seeks a highly experienced Senior System/Network Administrator – Systems Integration to support the implementation, operation, troubleshooting, and maintenance of complex IT systems and infrastructure.

You will administer Linux, UNIX, and Windows environments; build and maintain virtual and storage environments; configure network components; resolve complex technical problems; and support reliable day-to-day infrastructure operations.

Qualifications

• Fifteen (15) years of System/Network Administration experience.
• Bachelor's degree in a technical discipline from an accredited college or university.
• Active TS/SCI with Polygraph clearance at time of application.
• Experience with Service-Oriented Architecture (SOA) environments.

Responsibilities

• Manage daily configuration and operation of IT systems.
• Support implementation, troubleshooting, and maintenance of IT systems and associated infrastructure.
• Configure and manage Linux, UNIX, Windows operating systems.
• Provide Tier 1 Help Desk and Tier 2 escalation support for problem identification, diagnosis, and resolution.

Skills

System Administration

Network Administration

SOA concepts

Troubleshooting

Education

Bachelor's degree in a technical discipline

Tools

Linux

UNIX

Windows

Job description

About Leidos

Leidos is a FORTUNE 500® company bringing a mix of innovative technology and sector expertise to customers in the national security, engineering, and health industries. We deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers' success. Guided by our Mission, Vision, and Values, Leidos empowers its teams, contributes to its communities, and operates sustainably—always with a commitment to doing the right thing for our customers, our people, and our community. The Leidos Intel Sector combines technology-enabled services and mission software capabilities to support Intelligence Community customers as they address evolving national security challenges.

About the Opportunity

Leidos is seeking a highly experienced Senior System/Network Administrator – Systems Integration to support the implementation, operation, troubleshooting, and maintenance of complex IT systems and infrastructure. You will administer Linux, UNIX, and Windows environments; build and maintain virtual and storage environments; configure network components; resolve complex technical problems; and support reliable day-to-day infrastructure operations. At this level, you will also contribute to system and mission-architecture design, understand system-administration interdependencies within Service-Oriented Architecture (SOA) environments, and resolve complex integration issues spanning server hardware, applications, and software.

Why This Role Matters

Mission infrastructure depends not only on the reliability of individual systems, networks, storage platforms, and virtual environments, but also on how those components interact as part of a larger architecture. As a Senior System/Network Administrator – Systems Integration, you will bring deep infrastructure experience to both operational administration and complex integration challenges, helping ensure interconnected systems and applications function effectively together.

What You'll Do

Systems, Network & Infrastructure Administration

• Manage daily configuration and operation of IT systems.
• Support implementation, troubleshooting, and maintenance of IT systems and associated infrastructure.
• Monitor and support day-to-day operations across client/server, storage, network, mobile, and related devices.
• Configure and manage Linux, UNIX, Windows, and other applicable operating systems.
• Install and load operating-system software, troubleshoot system issues, and maintain system integrity.
• Configure network components and implement operating-system enhancements to improve reliability and performance.
• Build, configure, monitor, and maintain virtual environments.
• Build, configure, monitor, and maintain storage environments.
• Optimize system operations and resource utilization and perform system-capacity analysis and planning.

Advanced Troubleshooting & User Support

• Provide in-depth troubleshooting of IT systems.
• Assist users in accessing and using IT systems.
• Provide Tier 1 Help Desk and Tier 2 escalation support for problem identification, diagnosis, and resolution.
• Support dispatch-system and hardware problems and remain engaged through resolution.LP:
• Provide detailed analysis and feedback to agency management and internal customers for escalated tickets.
• Communicate system status, technical issues, and resolution progress to agency management and internal customers.

Systems Integration & Mission Architecture

• Support the design of systems, mission architecture, and associated hardware.
• Apply working knowledge of system‑administration interdependencies within Service‑Oriented Architecture (SOA) environments.
• Analyze and resolve complex problems involving server hardware, applications, and software integration.

Required Qualifications

• Clearance Active TS/SCI with Polygraph, at time of Application, to be considered for the position.

Education & Experience

• Fifteen (15) years of System/Network Administration experience supporting programs and contracts of similar scope, type, and complexity.
• Bachelor's degree in a technical discipline from an accredited college or university.
• Five (5) additional years of System/Network Administration experience may be substituted for the bachelor's degree.

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

August 24, 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.

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 $17.2 billion for the fiscal year ended January 2, 2026. 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 here.

Securing Your Data

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity

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.