5+ years of experience as a Systems Administrator or similar role
Bachelor's degree in a technical field (experience may substitute)
Active TS/SCI with Polygraph required
Current CompTIA Security+ certification
One relevant certification from an accepted list required
Responsibilities
Support the implementation, troubleshooting, and maintenance of IT systems
Manage and monitor client/server, storage, and network environments
Provide Tier 1 help desk and Tier 2 escalation support
Troubleshoot system issues and apply necessary updates
Manage user accounts, password resets, and VPN access
Configure and maintain Windows, Linux, and UNIX systems
Document processes and contribute to technical deliverables
Benefits
Mission-driven team environment with real impact
Challenging assignments and modern technologies
Clear path for career growth
Strong collaboration in small team setting
Direct interaction with end users and mission stakeholders
Full Job Description
Systems Network Administrator (TS/SCI w/ Poly)
Leidos - National Security Sector | Cyber & Analytics Business Area (CABA)
What You'll Do
In this role, you'll be a key part of a small, high-performing team supporting enterprise IT systems and end users. You'll:
Support the implementation, troubleshooting, and maintenance of IT systems
Manage and monitor client/server, storage, and network environments
Provide Tier 1 (Help Desk) and Tier 2 (escalation) support
Troubleshoot system issues and apply patches, updates, and configuration changes
Manage user accounts, password resets, VPN access, and PKI-related tasks
Configure and maintain Windows, Linux, and UNIX systems
Support virtualized and storage environments
Document processes, SOPs, and troubleshooting procedures
Contribute to reports and technical deliverables
Use ticketing systems and internal tools to track and resolve issues
You'll also provide hands-on support to users both at headquarters and across the enterprise-delivering excellent customer service while managing multiple priorities.
Work Environment
On-site support: Monday-Friday, 8:00 AM - 4:00 PM
Small team environment () with strong collaboration
Direct interaction with end users and mission stakeholders
What You Bring
You're a problem-solver who enjoys working in dynamic environments and supporting mission-critical systems.
Basic Qualifications
5+ years of experience as a Systems Administrator (or similar role)
Bachelor's degree in a technical field. Experience can be used in lieu of degree
Active TS/SCI with Polygraph (required)
CompTIA Security+ (current)
Accepted Certifications (one required)
CompTIA Security+
Microsoft Technology Associate (MTA-IT Infrastructure)
MCSA - Desktop (Windows 7 or Windows 8)
MCITP - Windows Client (Desktop Support or Desktop Administrator)
Why This Role Stands Out
At Leidos, you won't just be another administrator-you'll be part of a mission-driven team where your work has real impact. We provide challenging assignments, modern technologies, and a clear path for career growth.
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: April 28, 2026
Pay Range: Pay Range $59,150.00 - $106,925.00
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.
