Leidos’ Corporate Information Security Office, within the Digital Sector, is seeking an experienced System Administrator to support multiple mission-focused programs and projects at the Liberty Center location in Chantilly, Virginia.
In this role, you will provide technical analysis, planning, engineering, design, implementation, and operational support for Microsoft Windows Server and workstation environments. This position will play an integral role in modernizing interconnected wide area networks, implementing evolving customer requirements, and integrating acquired or merged systems and assets.
You will serve as a technical expert for complex operating systems and enterprise applications. Responsibilities include evaluating system requirements, developing technical specifications, recommending system redesigns and configuration changes, resolving complex technical issues, and providing project leadership to maintain a high level of service for internal and external customers.
Location: All work will be performed on-site in Chantilly, VA.
Clearance: You must currently hold active Top Secret/SCI clearance and be eligible to obtain Polygraph.
Primary Responsibilities
Support multiple mission programs and projects located at the Chantilly facility.
Design, plan, implement, configure, administer, and maintain Microsoft Windows Server and workstation environments.
Configure and deploy Windows servers, Windows workstations, and client software within network domain environments.
Maintain and configure local area networks and provide support for interconnected WAN environments.
Serve as a technical subject-matter expert for complex operating systems, system applications, and enterprise infrastructure.
Evaluate system requirements and determine the technical feasibility of proposed solutions.
Develop system specifications, implementation plans, and technical recommendations.
Recommend redesign, configuration, and performance improvements for operating systems and applications.
Maintain the availability, reliability, security, and performance of supported systems.
Perform operating system patching, security configuration, and remediation activities to ensure Windows endpoints remain secure and current.
Review and remediate vulnerability findings in coordination with cybersecurity personnel.
Collaborate with the Information System Security Manager to maintain system compliance with applicable government security standards.
Support Active Directory, Domain Name System, Microsoft Exchange, and multifactor authentication services.
Administer environments containing multiple Active Directory forests.
Manage and maintain workstation, server, storage, and printer hardware.
Support enterprise backup, disaster recovery, and high-availability capabilities.
Support enterprise storage solutions, including NetApp or Dell EMC technologies.
Troubleshoot complex hardware, software, operating system, network, and application issues.
Integrate newly acquired or merged systems and assets into existing enterprise environments.
Document system configurations, technical procedures, risks, issues, and operational status.
Provide timely status updates to program leadership, customers, cybersecurity personnel, and other stakeholders.
Provide technical and project leadership for system administration initiatives.
Deliver responsive, professional support to internal and external customers.
Participate in technical training and hands-on learning to develop proficiency with new technologies.
Required Qualifications
Bachelor’s degree with 8–12 years of relevant information technology experience. Additional relevant experience, training, or certifications may be considered in lieu of a degree.
United States citizenship.
Must hold current and active Top Secret/Sensitive Compartmented Information clearance with willingness and ability to successfully complete and maintain a polygraph.
Current DoD 8570 IAM Level I and/or IAT Level II compliant certification, as required for the position.
System administration experience in Microsoft Windows desktop and server operating system environments.
Experience administering Windows 10, Windows 11, Windows Server 2016, and Windows Server 2019 +.
Experience with Windows Server administration and a demonstrated desire to develop deeper Windows engineering expertise.
Experience with Active Directory, DNS, and Microsoft Exchange Server.
Experience managing and maintaining workstation, server, and printer hardware.
Experience with enterprise patch-management solutions.
Experience patching systems and remediating vulnerability findings.
Ability to configure and support Windows systems in a network domain environment.
Strong troubleshooting, analytical, and problem-solving skills.
Strong written and verbal communication skills.
Effective technical documentation and presentation skills.
Strong customer-service and interpersonal skills.
Ability to work independently and collaboratively as part of a technical team.
Preferred Qualifications
Experience supporting multiple Active Directory forests.
Experience administering Microsoft Exchange environments.
Experience with enterprise storage technologies such as NetApp or Dell EMC.
Experience implementing or supporting multifactor authentication.
Experience managing backup, disaster recovery, and high-availability solutions.
Previous on-site support experience within a government IT environment.
Experience integrating acquired, merged, or newly introduced systems into an established enterprise environment.
Experience supporting classified systems or mission-critical government programs.
Experience providing technical leadership for infrastructure modernization projects.
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:September 8, 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 8–12 years of relevant information technology experience; equivalent relevant experience, training, or certifications may substitute for the degree.
- United States citizenship.
- Current and active Top Secret/Sensitive Compartmented Information clearance.
- Willingness and ability to successfully complete and maintain a polygraph.
- Current DoD 8570 IAM Level I and/or IAT Level II compliant certification.
- System administration experience in Microsoft Windows desktop and server operating system environments.
- Experience administering Windows 10, Windows 11, Windows Server 2016, and Windows Server 2019 or later.
- Windows Server administration experience and interest in developing deeper Windows engineering expertise.
- Experience with Active Directory, DNS, and Microsoft Exchange Server.
- Experience managing and maintaining workstation, server, and printer hardware.
- Experience with enterprise patch-management solutions.
- Experience patching systems and remediating vulnerability findings.
- Ability to configure and support Windows systems in a network domain environment.
- Strong troubleshooting, analytical, and problem-solving skills.
- Strong written and verbal communication skills.
- Effective technical documentation and presentation skills.
- Strong customer-service and interpersonal skills.
- Ability to work independently and collaboratively as part of a technical team.
- Experience supporting multiple Active Directory forests.
- Experience administering Microsoft Exchange environments.
- Experience with enterprise storage technologies such as NetApp or Dell EMC.
- Experience implementing or supporting multifactor authentication.
- Experience managing backup, disaster recovery, and high-availability solutions.
- Previous on-site support experience within a government IT environment.
- Experience integrating acquired, merged, or newly introduced systems into an established enterprise environment.
- Experience supporting classified systems or mission-critical government programs.
- Experience providing technical leadership for infrastructure modernization projects.
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.
-
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.
-
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.
-
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.
.png)
