Windows Systems Administrator

Leidos; Suitland (MD); On-site; USD 73,000 - 133,000; Full time

Job summary

Leidos in Suitland, MD is seeking a Windows Systems Administrator III to support mission critical infrastructure. You will administer and maintain Windows server environments, implement secure, high availability enterprise services, and support global operations.

The ideal candidate holds an active TS/SCI clearance, CompTIA Security+ and Windows Server certifications, with hands-on experience in AD, DNS, DHCP, Exchange, Azure, RDS, VMware, and desktop management.

Qualifications

• Bachelor's degree with 7+ years of relevant experience or Master’s with 5+ years of relevant experience.
• Active TS/SCI clearance (in DISS).
• Active CompTIA Security+ certification and an active Windows Server operating system certification.
• Extensive experience administering enterprise Windows environments, including AD, DNS, DHCP, Exchange, Azure, RDS, VMware, Omnissa, desktop management, and Windows Server services.
• Experience performing advanced system troubleshooting.
• Strong interpersonal and communication skills.

Responsibilities

• Administer and manage advanced Windows Server environments and Microsoft enterprise services.
• Maintain daily system operations by monitoring, troubleshooting, and resolving issues affecting servers, applications, and OS.
• Perform performance tuning, hardware upgrades, and resource optimization for reliable performance.
• Troubleshoot and resolve complex Windows Server issues.
• Research, document, and recommend new system technologies and improvements.
• Review and implement IAVAs and IAVBs.
• Install, configure, secure, maintain, document, troubleshoot, and administer SQL databases for optimal performance.
• Support global operations by maintaining secure, resilient Windows infrastructure environments.
• Travel may be required to support other U.S. Navy commands (CONUS/OCONUS).

Skills

Windows administration

Troubleshooting

Interpersonal communication

Security clearance handling

Education

Bachelor's degree with 7+ years of experience

Master's degree with 5+ years of experience

Tools

Active Directory (AD)

DNS

DHCP

Microsoft Exchange

Azure Cloud

Remote Desktop Services

VMware

Omnissa

Desktop management

Windows Server services

Job description

Description

Windows Systems Administrator

Location: Suitland, MD

Security Clearance: Active TS/SCI Required

Leidos is seeking a Windows Systems Administrator III to support mission critical infrastructure in Suitland, MD. In this role, you will administer and maintain Windows server environments supporting enterprise infrastructure, standardized desktop services, and secure mission operations. The ideal candidate has extensive experience managing Microsoft technologies, troubleshooting complex systems, and maintaining secure, high availability Windows environments.

Primary Responsibilities

• Administer and manage advanced Windows Server environments and Microsoft enterprise services.
• Maintain daily system operations by monitoring, identifying, troubleshooting, and resolving issues affecting servers, applications, and operating systems.
• Perform performance tuning, hardware upgrades, and resource optimization to ensure reliable system performance.
• Troubleshoot and resolve complex Windows Server issues.
• Research, document, and recommend new system technologies and improvements.
• Review and implement Information Assurance Vulnerability Alerts (IAVAs) and Information Assurance Vulnerability Bulletins (IAVBs).
• Install, configure, secure, maintain, document, troubleshoot, and administer SQL databases to ensure optimal performance.
• Support global operations by maintaining secure, resilient Windows infrastructure environments.
• Travel may be required to support other U.S. Navy commands both within the continental United States (CONUS) and outside the continental United States (OCONUS).

Required Qualifications

• Bachelor's degree with 7+ years of relevant experience or a Master's degree with 5+ years of relevant experience. Additional relevant experience may be considered in lieu of a degree.
• Active TS/SCI clearance (in DISS).
• Active CompTIA Security+ certification and an active Windows Server operating system certification.
• Extensive experience administering enterprise Windows environments, including Active Directory (AD), Domain Name System (DNS), Dynamic Host Configuration Protocol (DHCP), Microsoft Exchange email services, Microsoft Azure Cloud, Remote Desktop Services, VMware, Omnissa, desktop management, and Windows Server services.
• Experience performing advanced system troubleshooting.
• Strong interpersonal and communication skills.

NITESONI

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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 8, 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 $73,450.00 - $132,775.00

The Leidos pay range for this job level is a general guideline onlyand 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 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 at www.leidos.com/careers/pay-benefits.

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 [e-mail].

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to 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.