Leidos has an opening for a Systems Administrator in Reston Virginia. 

Responsibilities include installation, configuration, administration, support and maintenance of systems, including associated hardware. Responsibilities may include management of systems infrastructures, implementing best practices to Identify and recommend system functional specifications, configuration of physical and virtual systems, backup and recovery of IT infrastructure. Support duties may include updating and supporting systems by tuning performance, allocating storage space. Implementing critical patches, reviewing systems performance logs to identify anomalies and troubleshoot issues.

Candidate must also be able to develops solutions to complex technical issues and problems that impact multiple area or disciplines and regularly employ ingenuity and creativity to develop new technical solutions and systems in order to achieve functional objectives.

Basic Qualifications

• TS/SCI Clearance is required to be considered. Must be willing/able to obtain a TS/SCI w/polygraph
• Must be a US Citizen
• Ability to communicate with internal team members across multiple areas and client team members.
• Requires deep understanding of and ability to apply principles, theories, and concepts of technical domain and has broad understanding of other related specialty areas. 
  Typical Education & Experience:
• Typically requires BS and 4 – 8 years of prior relevant experience or Masters with 2 – 6 years of prior relevant experience.  Relevant work experience will be considered in lieu of degree.
• Experience with DISA STIGs.
• Experience with ACAS/Nessus.
• Experience in utilizing Microsoft operating systems to deploy, manage, and support applications and services, ensuring system reliability and user productivity.
• Ability to administer Active Directory (AD) to manage user accounts, permissions, and access controls across the network.
• Experience in automating IT tasks and processes using Microsoft PowerShell scripting to improve efficiency and productivity.
• Experience in overseeing security measures to protect organization from possible threats. Identify security requirements and risks and develop mitigation policies.
• Experience in managing server infrastructure to ensure reliability, performance, and security of organizational systems and applications.
• Experience in managing and configuring IT infrastructure to ensure optimal performance, security, and availability of services, while troubleshooting and resolving issues as they arise.
• Ability to create and enhance systems to meet organizational requirements and specifications while ensuring compatibility and compliance.
• Ability to implement systems and applications to support organizational initiatives and workflows effectively.
• Experience in managing complex systems throughout their life cycles and integrating various components, subsystems, or processes.
• Experience in providing technical assistance for related issues, ensuring timely resolution of problems, and maintaining optimal system performance and user satisfaction.
• Ability to identify and resolve technical issues that arise within a complex system or network infrastructure.
• Experience in implementing and managing virtual environments to optimize resource utilization, enhance scalability, and ensure system reliability.

Preferred Qualifications (1 or more)

• AWS Certified Cloud Practioner
• CompTIA A+

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:

July 13, 2026

Pay Range:

Pay Range $73,450.00 - $132,775.00

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.