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Added 13 hours ago
Chief Engineer
Booz Allen Hamilton_United States
Reston, VA · McLean, VA
…These tools operate across multiple complex network fabrics with varying security classifications. As the Chief Engineer, you will directly manage and orchestrate cross-functional…
Added 18 hours ago
System Engineer
BOOZ, ALLEN & HAMILTON, INC.
Chantilly, VA
Booz Allen is seeking a skilled systems engineer with experience supporting enterprise desktop and server environments to join our team. In this role, you will draw upon experience…
Added 1 day ago
Systems Engineer
2HB Incorporated
Annapolis Junction, MD
This is a full-time position, and requires a TS/SCI/Full Scope Polygraph Clearance.
Added 1 day ago
Systems Engineer
Institute for Defense Analyses (IDA)
La Jolla, CA, CA
Project ability to obtain and maintain Top Secret/SCI security clearance with lifestyle polygraph. Current TS/SCI with lifestyle polygraph clearance preferred.
Added 1 day ago
OP
System Engineer 3 BP-064
Onyx Point, Inc.
Hanover, MD
- $78,000 to $250,000 USD / year
TO BE CONSIDERED FOR THIS POSITION YOU MUST HAVE AN ACTIVE TS/SCI W/ FULL SCOPE POLYGRAPH SECURITY CLEARANCE (U.S. CITIZENSHIP REQUIRED)
Added 1 day ago
Infrastructure/System Administrator Lead
CACI International
Sterling, VA
Active TS/SCI security clearance (Willing and able to obtain a polygraph)
Added 1 day ago
Illumio Zero Trust Platform Engineer
BOOZ, ALLEN & HAMILTON, INC.
Reston, VA
Active TS/SCI clearance; willingness to take a polygraph exam
Added 2 days ago
Identity and Directory Services Engineer - TS/SCI with Polygraph
GD Information Technology, Inc.
United States
We are seeking highly motivated engineers with a thirst for learning, in support of a geographically dispersed, state of the art systems that seamlessly integrate Linux and Microsoft…
Added 2 days ago
Senior Systems Administrator
Belay Technologies
Annapolis Junction, MD
Maintain technical documentation, diagrams, and stand operating procedures with a level of clarity that allows another engineer to step in seamlessly.
Added 2 days ago
Systems Engineer SME (TS/SCI with Poly Required)
GCI
Chantilly, VA
Demonstrated experience with knowledge of technologies such as Cisco, Juniper, Forward Networks, VMware, Solarwinds.
Added 2 days ago
Cyber Exploiter/Vulnerability Assessment Engineer (TS/SCI with Poly Required)
GCI
Chantilly, VA
…building and maintaining trusted and reliable partnerships with our customers and…
Added 2 days ago
Linux Systems Engineer
Leidos
Chantilly, VA
Candidates must currently possess an active TS/SCI with the required Polygraph and be eligible for customer crossover.
Added 2 days ago
Systems Engineer/Administrator Lead
CACI International
Danbury, CT
Minimum Clearance Required to Start: TS/SCI with Polygraph
Added 3 days ago
DS
VMware Engineer
DAn Solutions
Annapolis Junction, MD
- $100,000 to $150,000 USD / year
REQUIRES AN EXISTING/ACTIVE TS/SCI WITH CI POLYGRAPH - NO REMOTE WORK, MUST WORK ON SITE
Added 3 days ago
DS
VMware Engineer
DAn Solutions
Sterling, VA
- $100,000 to $150,000 USD / year
REQUIRES AN EXISTING/ACTIVE TS/SCI WITH CI POLYGRAPH - NO REMOTE WORK, MUST WORK ON SITE
Added 3 days ago
DS
Senior Principal Systems Engineer – Desktop Engineering
DAn Solutions
Sterling, VA
- $125,000 to $145,000 USD / year
REQUIRES AN EXISTING/ACTIVE TS/SCI WITH CI POLYGRAPH - NO REMOTE WORK, MUST WORK ON SITE
Added 3 days ago
DS
Senior Principal Systems Engineer – Desktop Engineering
DAn Solutions
Annapolis Junction, MD
- $125,000 to $145,000 USD / year
REQUIRES AN EXISTING/ACTIVE TS/SCI WITH CI POLYGRAPH - NO REMOTE WORK, MUST WORK ON SITE
Added 3 days ago
Senior VDI Engineer
D2 Technical Services
Arnold, MO
Active TS/SCI with Polygraph. Can sponsor for a polygraph.
Added 3 days ago
Senior VDI Engineer
D2 Technical Services
Springfield, VA
Active TS/SCI with Polygraph. Can sponsor for a polygraph.
Added 3 days ago
Infrastructure/System Administrator Lead
CACI, INC.-FEDERAL
Sterling, VA
Active TS/SCI security clearance (Willing and able to obtain a polygraph)
Added 3 days ago
Infrastructure/System Administrator Lead
CACI
Sterling, VA · Sterling
Active TS/SCI security clearance (Willing and able to obtain a polygraph)
Added 3 days ago
Systems Engineer 2
Endepth Solutions
Laurel, MD
Support VMware virtualized environments and assist with virtual machine deployment, configuration, and lifecycle management.
Added 3 days ago
CLOUD SOFTWARE ENGINEER - AWS/DevOps- 12+ yrs of Experience - TS/SCI w/Poly clearance is required - TB - 27154
Halogen Engineering Group, Inc
Annapolis Junction, MD
Cloud Software Engineer - AWS/DevOps - 12+ yrs of Experience - TS/SCI with Poly Required
Added 3 days ago
Amazon Dedicated Cloud Engineer, US ADC Security
Amazon.com Services LLC
Herndon, VA
This position requires that the candidate selected currently possess and maintain an active TS/SCI security clearance with polygraph.
Added 3 days ago
Amazon Dedicated Cloud Engineer, US ADC Security
Amazon.com Services LLC
Herndon, VA
This position requires that the candidate selected currently possess and maintain an active TS/SCI security clearance with polygraph.

Leidos

Linux Systems Engineer

Chantilly, VA, United States

Pay Range $131,300.00 - $237,350.00

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Job details

Pay: Pay Range $131,300.00 - $237,350.00
Experience: Bachelor's degree and approximately 12 years of relevant experience.
Posting language: English
Posted: Oct 22, 2026

Original job description

Description

Leidos is seeking a Linux Systems Engineer to support a mission-critical customer environment in Chantilly, VA. This position is ideal for a hands-on Linux administrator or systems engineer with experience supporting Linux servers in virtualized environments and maintaining system security and compliance requirements .

The successful candidate will support day-to-day system administration, engineering, configuration management, virtualization, and security operations across a multi-network environment.

Candidates must currently possess an active TS/SCI with the required Polygraph and be eligible for customer crossover.

Primary Responsibilities

Administer, configure, maintain, and troubleshoot Linux-based systems and servers within a virtualized environment.
Maintain the operational security posture of information systems and support day-to-day system security operations.
Perform and support system vulnerability scans, security audits, remediation, and compliance activities .
Implement and maintain system security configurations and requirements.
Provide configuration management for information system hardware, software, firmware, and security components.
Support system engineering activities, including planning, designing, analyzing, and improving hardware- and software-based system processes.
Troubleshoot complex system and infrastructure issues and develop effective technical solutions.
Support systems operating across multiple network environments.
Work collaboratively with engineers, developers, technicians, analysts, and users to identify requirements and resolve technical issues.
Investigate and document existing system architectures and configurations.
Support operational systems in a dynamic mission environment.

Basic Qualifications

Active TS/SCI with the required Polygraph.
Bachelor's degree and approximately 12 years of relevant experience.
At least four years of recent experience supporting systems engineering, system administration, system processes, and/or software development methodologies.
Demonstrated hands-on experience with Linux system administration and engineering .
Experience maintaining the security posture of information systems , including system scans, security audits, and day-to-day security operations.
Experience with configuration management of system hardware, software, firmware, and security components.
Demonstrated ability to troubleshoot and solve complex technical problems.
Experience working as part of a multidisciplinary technical team.
Strong verbal and written communication skills.

Preferred Qualifications

Experience with Red Hat Enterprise Linux (RHEL) .
Experience implementing or maintaining DISA STIGs or similar system-hardening/security-compliance requirements .
Experience with virtualization and container technologies such as VMware, Red Hat Virtualization, and Docker .
Experience configuring, deploying, or maintaining Identity and Access Management (IdAM), Multi-Factor Authentication (MFA), and PKI-enabled systems .
Experience translating user and developer use cases into technical system requirements.
Experience documenting existing system architectures.
Experience supporting operational mission systems.

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 22, 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 $131,300.00 - $237,350.00

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 LeidosCareersFraud@leidos.com .

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission (https://reportfraud.ftc.gov/#/) .

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.

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REQNUMBER: R-00195201

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status. Leidos will consider qualified applicants with criminal histories for employment in accordance with relevant Laws. Leidos is an equal opportunity employer/disability/vet.

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