TS/SCI Classified Systems Administrator — Windows/Linux
RAND
RAND is seeking a Classified Systems Administrator, II to support their classified systems in Washington, D.C. This full-time position requires office presence 5 days a week. Ideal candidates will possess a background in security practices and detailed communication skills. Responsibilities include supporting classified systems, assisting with installations, and implementing security controls. Candidates must have a TS/SCI clearance and at least 3 years’ experience in a similar environment. Strong benefits are part of the offer. #J-18808-Ljbffr RAND
- ...is seeking an experienced Systems Administrator for a long-term project in... ...requires expertise in managing Windows Server, Linux systems, and Citrix environments within a classified setting. Applicants must... ...experience and an active DoD TS/SCI clearance. This opportunity...WindowsLinux
- ...VA Clearance Required: TS/SCI minimum (US Citizen) Employment... ...an experienced IT Systems Administrator to support a U.S. Army... ...security, and reliability across classified and unclassified networks.... .... ~ Proficiency with Windows and/or Linux operating systems...WindowsLinuxFull timeLocal area
- Nightwing Group is seeking a Cloud Systems Administrator in Arlington, VA. The role involves deploying... ...strong expertise in AWS services, Linux/Unix, and Windows administration. A Bachelor's degree... ...with U.S. citizenship and an active TS/SCI clearance. Join our team and help...WindowsLinux
- Base-2 Solutions is hiring a Junior Systems Administrator in Bethesda, MD. The role involves supporting... ...the OSINT Integration Center with Linux and Windows systems administration, performance... .... Candidates must have an active TS/SCI clearance, a Bachelor's degree, and experience...WindowsLinux
$147.29k - $199.28k
Virtualization Systems Administrator Own your opportunity to support national defense. Your work... ...and supporting infrastructure across Windows and Linux platforms Monitor health, performance... ...CE, etc.) Clearance : Active TS/SCI clearance with a favorable polygraph...WindowsLinux$92.3k - $166.85k
...a new and exciting opportunity for a System Administrator in our Intel Sector's Cyber & Analytics... ...Network Switches, Routers, LANs, & cabling, Windows/Linux operating systems, VMware, etc.).... ...month. Clearance Required: Must have TS/SCI with Polygraph. Preferred...WindowsLinuxWork at officeLocal areaImmediate startRemote workFlexible hours$147.29k - $199.28k
...to Obtain: Top Secret SCI + Polygraph Public Trust... ...Skills: Critical Systems,Enterprise IT,Enterprise Monitoring,System Administration,System Monitors Experience... ....) CLEARANCE: Active TS/SCI clearance with a... ...Working knowledge of Windows and Linux systems administration...WindowsLinuxTemporary workFlexible hours- Systems Administrator - (Active TS/SCI security clearance with a current polygraph ) College Park, United States | Posted on 06/08/2026 Fifteen (15... ...degree. Experience with multiple operating systems (Windows, Linux, Unix) Experience with Ubuntu Familiar with System and...WindowsLinux
- SageCor Solutions is seeking a qualified candidate with Active TS/SCI clearance in College Park, Maryland. The position involves configuring and managing Linux and Windows systems, administering HPC systems, and providing IT support. Proficiency in scripting (C and Python...WindowsLinux
- A technology solutions provider is seeking a Systems Administrator 4 with expertise in both Linux and Windows systems administration. This role involves performing... ...a minimum of 10 years' experience and an active TS/SCI clearance. The position entails working independently...WindowsLinux
- ...Information Technology is seeking a Systems Administrator for a crucial role at Langley AFB, Virginia... ...will have extensive knowledge of Windows and Linux systems and will be responsible for... ...Candidates must possess or be eligible for TS/SCI clearance. #J-18808-Ljbffr General...WindowsLinux
- Base-2 Solutions is seeking a Systems Administrator to support the OSINT Integration Center. The role requires expertise in Linux and Windows systems administration and a Top Secret/SCI clearance. Responsibilities include installing, configuring, and troubleshooting systems...WindowsLinux
$75.7k - $112.4k
...work. Position Description The Classified Systems Administrator, II will work as an integral... ...and maintains various Windows Desktop technologies and may include Linux operating systems, VMware, and... ...Support secret collateral and TS/SCI classified workstations and servers...WindowsLinuxFull timeWork experience placementWork at officeRemote work- ...Network/System Administrator III Security Clearance Requirement: TS, with SCI Eligibility ***Position Requires US Citizenship*** Location... ...supported platforms: Microsoft Windows Server, Active Directory Red Hat Enterprise Linux servers, MS Hyper-V/VMWare/ESx/Xen...WindowsLinuxWork at officeLocal area
$125k - $200k
...Clearance Required: Top Secret SCI w Full Scope Poly Education Required... ...The MIL Corporation is seeking a Systems Administrator with TS/SCI, FS (Systems Administration, Associate... ....) Functional knowledge of UNIX, LINUX and Windows operating systems in the conduct of...WindowsLinuxFull timeContract workWork experience placementRemote work- ...Job Description VIRTUALIZATION SYSTEMS ADMINISTRATOR YOUR IMPACT Own your opportunity... ..., and troubleshoot virtual machines (Windows and Linux) to support mission applications and... ...Security+ CE, etc.) CLEARANCE: Active TS/SCI clearance with a favorable polygraph...WindowsLinux
- ...Top Secret/SCI with Active Full Scope Polygraph - must be... ...are seeking an experienced Linux-focused System Administrator to support a mission-critical... ...) environment requiring a TS/SCI clearance with an... ..., container platforms, and classified networked systems. The Systems...Linux
$88k - $130.9k
...all staff. Position Description The Classified Systems Administrator, III is responsible for the... ...requires strong expertise in either Windows or Linux systems and works closely with cybersecurity... ...Clearance Must have active TS/SCI access with Poly preferred. This position...WindowsLinuxFull timeWork experience placementWork at officeMonday to Friday$95k - $125k
...Required Security Clearance: TS/SCI Required Education:... ...LLC is seeking a motivated System Administrator to support the Office of Naval... ...teams Strong experience with Windows Server and Active Directory... ...issues Supporting secure, classified environments Desired Qualification...WindowsFull timeCasual workWork at office- A defense contracting firm in Arlington, VA is seeking a Systems Administrator to support large-scale government operations. The successful candidate will optimize system operations, design virtualized environments, and troubleshoot complex technical issues. Qualifications...WindowsLinux
- Leidos is seeking an experienced Journeyman System Administrator located in Alexandria, Virginia to support critical data and analytics... ...an enterprise environment, especially with systems like Linux and Windows. This position offers a competitive pay range and various...WindowsLinux
- ...Windows Systems Engineer And Administrator Vexterra is looking to fill a Windows Systems... ...Ability to triage and properly classify incidents and prioritize... ...Clearance Active TS/SCI clearance Active CI... ...maintaining systems in a Linux environment Certification...WindowsLinuxShift work
$140k - $175k
...Note: A TS/SCI with POLYGRAPH IS REQUIRED FOR THIS ROLE Who... ...a large, complex enterprise system. You will be responsible for... ...Experience developing on both Windows and/or Linux operating systems. Proven... ...alignment. This position is classified as Exempt under the Fair...WindowsLinux- ...McLean, Virginia is seeking a Senior Systems Administrator & Database Engineer to ensure secure... ...Responsibilities include administering both Linux and Windows systems, managing SQL Server... ...degree in a relevant field and active TS/SCI clearance. The position offers an extensive...WindowsLinux
$114k - $149k
...Anduril is changing how military systems are designed, built and... ...is seeking a Systems Administrator to directly support our most... ...WHAT YOU’LL DO Administer Windows and Linux systems across NIPR, SIPR,... ...compliance scanning Active TS/SCI Clearance EXPECTED OUTCOMES...WindowsLinuxFull timeWork experience placementRelocation package- ...federal contracting organization seeks a Systems Administrator to support their server environment... ...administration, especially with Windows and Linux systems. They must also hold Security+ CE certification and have active TS/SCI clearance. Strong understanding of federal...WindowsLinux
- ...integrator is looking for a Systems Security Engineer to manage... ...infrastructure supporting Windows and Linux systems in Washington, DC.... ...security systems engineering with TS/SCI clearance. Strong skills in... ...communication, system administration, and intrusion detection...WindowsLinuxFull time
$142.79k - $172.5k
...Able to Obtain: Top Secret SCI + Polygraph US... ...monitoring and protecting the classified and unclassified systems of a major Intelligence Community... ...Security Clearance Level: TS/SCI clearance and ability... ...Proofpoint, Fidelis, Solera, Windows, and Linux Operating Systems. Days...WindowsLinuxTemporary workMonday to FridayFlexible hoursShift work$185k - $265k
Senior System Administrator (Windows) Location: McLean, VA (transitioning to Chantilly, VA) Clearance Required: Active TS/SCI with CI Polygraph Salary Range: $185,000 - $265,000 Travel: Up to... ...Preferred Qualifications Experience with Linux (server or workstation environments)...WindowsLinuxFull timeTemporary workImmediate start- ...ensure optimal operation of multi-user computer systems while collaborating with engineers and... ...comprehensive support. Applicants should have strong Linux skills, experience in AWS environments, and must possess a TS/SCI clearance or the ability to obtain one. A bachelor...Linux
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