Sr Systems Administrator

Leidos has a new and exciting opportunity for a Sr. Systems Administrator in our Intel Sector's (IS) Solutions Analysis Business Area (ASBA). 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 Description

The Sr. Systems Administrator to support the design, development and deployment of products, tools and capabilities in support of a dynamic customer enterprise. This role performs System Administration tasks on a customer’s system that supports mission needs and coordination requirements. This individual will work in a team environment and coordinate with appropriate elements to effectively meet design, development, deployment, and monitoring/securing objectives.

Primary Responsibilities:

• Design, build, test and maintain scalable and stable technology solutions to meet mission needs
• Create documentation to include flowcharts, diagrams, manuals and any other required or requested deliverables.
• Use the Agile methodology to document requirements, configure, test, implement and support efficient solutions
• Perform automation tasks through scripting and testing
• Rotate between O&M to Dev Ops roles as required for Agile processes
• Evaluate alternatives including cost and risk, supportability and analyses for total systems; resolve highly complex multi-domain systems issues
• Operating and maintaining systems in Windows

Basic Qualifications:

• Bachelors degree with 8+ years of prior relevant experience or Masters with 6+ years of prior relevant experience. Additional years of experience may be substituted in lieu of a degree.
• Must have an active TS/SCI with a Polygraph, to be considered
• Experience with Windows 2012/2016
• Experience with Active Directory and DNS
• Experience with hardening Windows environments
• Demonstrated experience with Scripting/Automation
• Experience troubleshooting issues in a growing environment
• Experience with server patch management methodologies
• Familiarity working with Window’s PowerShell.
• Experience working with Jira and Confluence.
• Experience working in an Agile environment
• Experience establishing goals and plans that meet project objectives.

#CABARESTON

#ASBA

#HALO

#HALOincumbents

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:

October 21, 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 $92,300.00 - $166,850.00

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.