Annapolis Junction, Maryland, United States · On-site
$116k–$210k/yr
Senior Windows System Administrator; requires TS/SCI Polygraph up front. Leidos has a new and exciting opportunity for a Senior Windows System Administrator in our Intel Sector's Cyber & Analytics Business Area (CABA). O…
Skills: Windows Administration, Active Directory, DNS, Group Policy Objects, Microsoft SCCM
Annapolis Junction, Maryland, United States · On-site
$92k–$167k/yr
Mid/Sr System Administrator Leidos has a new and exciting opportunity for a Mid/Sr System Administrator in our Intel Sector's Cyber & Analytics Business Area (CABA). Our talented team is at the forefront in Security Engi…
Skills: System Administration, Linux, Windows Server, Active Directory, Troubleshooting
Annapolis Junction, Maryland, United States · On-site
$135k–$145k/yr
Red Arch Solutions is seeking a Systems Engineer with autonomous dataflow experience to join a mission-focused team in Annapolis Junction, MD. Responsibilities:Analyzes user’s requirements, concept of operations document…
Skills: Systems engineering, Autonomous dataflow, System architecture, Technical leadership, Requirements analysis
Annapolis Junction, Maryland, United States · On-site
$278k–$308k/yr
Purpose and Impact: This team is focused on providing cloud-based geolocation solutions in near-real-time directly to decision makers and warfighters around the world. The ideal candidate has recent experience working wi…
Skills: Cloud Infrastructure, Infrastructure as Code, Terraform, Kubernetes, Docker
Annapolis Junction, Maryland, United States · On-site
$77k–$163k/yr
Nightwing provides technically advanced full-spectrum cyber, data operations, systems integration and intelligence mission support services to meet our customers’ most demanding challenges. Our capabilities include cyber…
Skills: Vulnerability research, Reverse engineering, Program analysis, Debugging, Fuzzing
Annapolis Junction, Maryland, United States · On-site
$122k–$253k/yr
Nightwing provides technically advanced full-spectrum cyber, data operations, systems integration and intelligence mission support services to meet our customers’ most demanding challenges. Our capabilities include cyber…
Skills: Systems Administration, UNIX, Windows Operating Systems, Network Configuration, Tier 1 Help Desk
Annapolis Junction, Maryland, United States · On-site
$119k–$132k/yr
Cryptologic Computer Scientist 2 Location: Annapolis Junction, MD | Onsite Clearance Required: TS/SCI with Polygraph Employment Type: Full-Time Salary Range: $119,000-$132,200 Join a Growing Team at Weeghman & Briggs Wee…
Skills: Cryptologic computer science, Operating systems, Compiler theory, Database theory, Algorithm analysis
Marriott International Hotels, Inc.Annapolis Junction, Maryland, United States · On-site
POSITION SUMMARY Perform preventive maintenance of the major mechanical and life safety equipment at multiple properties within a geographic area or cluster. Drive from home base location to properties within area of res…
Skills: Hvac, Refrigeration, Preventive maintenance, Life safety inspections, Electrical systems
Annapolis Junction, Maryland, United States · On-site
$125k–$265k/yr
Position Summary: The Kenjya-Trusant Group, LLC (KTG) is looking for an Information System Security Officer to support our customer in the Annapolis Junction, MD area. Essential Job Functions: Provide support to senior I…
Skills: Information System Security, Security Policies, Configuration Management, Risk Management, System Security Plan
Annapolis Junction, Maryland, United States · On-site
$130k–$270k/yr
Build to something to be proud of. Captivation has built a reputation on providing customers exactly what is needed in a timely manner. Our team of engineers take pride in what they develop and constantly innovate to pro…
Skills: Linux, Bash, Python, Ansible, SaltStack
Annapolis Junction, Maryland, United States · On-site
$177k–$239k/yr
Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret SCI + Polygraph Clearance Level Must Be Able to Obtain: Top Secret SCI + Polygraph Public Trust/Other Required: None Job Family: Software En…
Skills: Bash, Docker, Kubernetes, Linux CLI, Python
Annapolis Junction, Maryland, United States · On-site
$34/hr–$46/hr
Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret SCI + Polygraph Clearance Level Must Be Able to Obtain: Top Secret SCI + Polygraph Public Trust/Other Required: None Job Family: Technical S…
Skills: Help desk software, Remote support, Technical troubleshooting, Hardware installation, Software configuration
Annapolis Junction, Maryland, United States · On-site
$196k–$265k/yr
Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret SCI + Polygraph Clearance Level Must Be Able to Obtain: Top Secret SCI + Polygraph Public Trust/Other Required: None Job Family: Software En…
Skills: Splunk, Python, Linux CLI, Shell Scripting, Perl
Annapolis Junction, Maryland, United States · On-site
$34/hr–$46/hr
Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret SCI + Polygraph Clearance Level Must Be Able to Obtain: Top Secret SCI + Polygraph Public Trust/Other Required: None Job Family: Technical S…
Skills: Help desk software, Remote support, Technical troubleshooting, Hardware installation, Software configuration
Annapolis Junction, Maryland, United States · On-site
$176k–$238k/yr
Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret SCI + Polygraph Clearance Level Must Be Able to Obtain: Top Secret SCI + Polygraph Public Trust/Other Required: None Job Family: Software En…
Skills: C++, Agile Methodology, IEEE 802.11, Software Defined Radio, User Interfaces
Annapolis Junction, Maryland, United States · On-site
$47/hr–$63/hr
Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret SCI + Polygraph Clearance Level Must Be Able to Obtain: Top Secret SCI + Polygraph Public Trust/Other Required: None Job Family: Technical S…
Skills: System administration, Troubleshooting, Computer hardware, Remote access, Remote support
Annapolis Junction, Maryland, United States · On-site
Serving Maryland and the Greater Washington D.C. area, SageCor Solutions (SageCor) is a growing company bringing complete engineering services and true full lifecycle System Engineering services to areas requiring (or de…
Skills: Systems Engineering, High Performance Computing, Large Data Analytics, Information Technologies, MS Project
Annapolis Junction, Maryland, United States · On-site
$33/hr–$44/hr
Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret SCI + Polygraph Clearance Level Must Be Able to Obtain: Top Secret SCI + Polygraph Public Trust/Other Required: None Job Family: Contact Cen…
Skills: Computer Literacy, Customer Relationships, Customer Service, Learning Quickly, Reliability
Annapolis Junction, Maryland, United States · On-site
$66k–$136k/yr
Job Title: Mission Planner/Scheduler Job Category: Intelligence Time Type: Full time Minimum Clearance Required to Start: TS/SCI with Polygraph Employee Type: Regular Percentage of Travel Required: Up to 10% Type of Trav…
Skills: Mission planning, Resource management, SIGINT analysis, Technical solutions, Mission scheduling
Annapolis Junction, Maryland, United States · On-site
$202k–$274k/yr
Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret SCI + Polygraph Clearance Level Must Be Able to Obtain: Top Secret SCI + Polygraph Public Trust/Other Required: None Job Family: IT Infrastr…
Skills: Linux, Bash, Python, System administration, COTS implementation
Annapolis Junction, Maryland, United States • On-site
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The candidate will provide daily systems administration, operations, and maintenance support for a complex, geographically dispersed infrastructure. Responsibilities include managing virtual server clusters, performing security patching, and ensuring system availability through proactive monitoring and incident resolution.
Candidates must possess a bachelor's degree in a technical field and at least 12 years of relevant experience, including 7 years in Windows administration and security management. A TS/SCI clearance with a polygraph is strictly required for this role.
Senior Windows System Administrator; requires TS/SCI Polygraph up front.
Leidos has a new and exciting opportunity for a Senior Windows System Administrator in our Intel Sector's Cyber & Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At Leidos, we offer competitive benefits, including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more. Join us and make a difference in National Security!
Job Summary
Leidos is seeking a Senior Windows System Administrator to join a high-performing Agile team operating within the Scaled Agile Framework (SAFe) in support of a complex, fast-paced program. In this role, the selected candidate will provide daily systems administration and operations and maintenance support across multiple systems with a broad geographic footprint. Key responsibilities include responding to system engineering requests that support operational requirements, as well as engineering, deploying, and sustaining new capabilities within the environment.
Primary Responsibilities
The selected candidate will be responsible for monitoring test infrastructure systems, applications, and processes to ensure issues are identified, tracked, and resolved in a timely manner. This role also includes supporting server, router, and firewall configuration, as well as performing security management and application performance optimization activities in an environment made up of VMware server hosts, Windows and Linux guest servers, and Virtual Desktop Infrastructure (VDI). Additional responsibilities include:
• Maintaining multiple virtual server clusters and addressing system scan findings, vulnerability management patching, and Active Directory configuration issues.
• Using enterprise monitoring tools to detect, assess, and respond to alerts.
• Providing technical support to partner workgroups on overlapping efforts while maintaining strong interdepartmental collaboration.
• Managing Information Assurance Vulnerability Alerts (IAVAs) and system security scanning in accordance with applicable System Security Plans, ensuring vulnerabilities are identified and remediated quickly and accurately.
• Initiating IAVA responses and system security scans, completing remediation actions, deploying patches and security updates to designated sites, and executing monthly security scans.
• Identifying and resolving hardware and software problems.
• Proactively notifying customers when test infrastructure delays may affect their ability to complete business functions on time and communicating system outages and publishing status updates to users, as needed.
• Authoring and maintaining clear, accurate, and concise documentation.
• Responding to calls and emails in a timely and professional manner.
• Planning and implementing IT enhancements and supporting project-related work.
• Responding to system administration, operations, and maintenance issues on an on-call basis when required.
Basic Qualifications
• Bachelor’s degree in Computer Science, Information Technology, or a related technical field and 12 years of prior relevant experience. Additional experience may be substituted for a degree.
• Must have at least 7 years of Windows administration experience.
• Must have at least 7 years of experience in information security management, with demonstrated expertise in security governance, risk management, compliance, and operational security functions.
• Must have at least 5 years of experience with each of the following:
o Implementing and managing Windows Active Directory and DNS environments
o Creating and managing Group Policy Objects (GPOs)
o Microsoft SCCM
o Microsoft Exchange administration and Exchange Management Shell
• Must have experience with Windows Command Line, PowerShell, and PowerShell scripting.
• Strong understanding of advanced security protocols, standards, and information security principles is a must.
• Experience with software and security architectures.
• Hands-on experience with IAVA management.
• Hands-on experience supporting users, optimizing system operations, and monitoring enterprise IT systems.
• Commitment to best practices, including compliance with maintenance windows and change control procedures.
• Familiarity with Windows and Linux operating systems, VMware, and networking technologies including switches, routers, LANs, and cabling.
• Must have strong analytical skills, attention to detail, and the ability to work effectively both independently and as part of a team.
Preferred Qualifications
• Experience documenting and supporting security accreditation and certification activities.
• Experience with network security technologies, including multi-domain solutions, PKI, SSPs, and vulnerability assessments.
• Experience with data center design and configuration, including rack-and-stack, power planning, and equipment placement.
• Experience with VMware.
• Experience using automation tools such as Ansible or SaltStack.
• Experience serving in a System Administrator role supporting software configuration management and development environments.
At Leidos, the opportunities are boundless. We challenge our staff with interesting assignments that allow them to thrive professionally and personally. For us, helping you grow your career is good business. We look forward to learning more about you – apply today.
careers.leidos.com/CONMD
CSSKEY
CONMD
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.
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.
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.
An industry & technology leader serving government & commercial customers with smarter, more efficient innovations
Leidos is an industry and technology leader serving government & 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. 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 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, visit careers.leidos.com for our latest opportunities.
Offices: 1750 Presidents St, Reston, Virginia 20190, US · 11955 Freedom Drive, Reston, VA 20190, US · 1145 N 2nd St, Leavenworth, KS 66048, US · 9600 Great Hills Trail, Austin, TX 78759, US · 221 3rd St, Newport, RI 02840, US
Based on 667 listings with disclosed salaries, most security & safety jobs in Annapolis Junction, MD pay between $92k–$255k per year. Individual offers vary with seniority, company size, and specialization.
There are currently 826 open security & safety positions in Annapolis Junction, MD listed on Clera. New openings are added daily as companies post roles.
Companies currently hiring include Captivation, General Dynamics Information Technology, Peraton, Wyetech, LLC, Booz Allen Hamilton, among others. Browse the listings above to see every active employer.
Yes — 99 of the 826 open security & safety positions offer remote or hybrid work (3 remote, 96 hybrid).
Each listing links directly to the employer's application page. Apply early — fresh listings get the most recruiter attention in the first two weeks.
