IT Systems Admin - Defense/Classified (FS Poly)
$136k - $275kPeskind Executive Search, Inc.
FULL SCOPE POLY Clearance - REQUIRED Our client is a defense technology company with a mission to transform U.S. and allied military capabilities with advanced technology. By bringing the expertise, technology, and business model of the 21st century’s most innovative companies to the defense industry, our client is changing how military systems are designed, built and sold. Our client's family of systems is powered by an AI-powered operating system that turns thousands of data streams into a realtime, 3D command and control center. As the world enters an era of strategic competition, our client is committed to bringing cutting-edge autonomy, AI, computer vision, sensor fusion, and networking technology to the military in months, not years. Our client is seeking an IT Systems Administrator to directly support our most sensitive programs. You will be a part of the team building and maintaining the critical classified infrastructure. You will have the opportunity to work with and learn from some of the world’s best engineers and cybersecurity professionals as you help to implement cutting edge systems. You will work directly with customers and systems deployed across the globe in support of national security missions all while gaining invaluable experience navigating complex cybersecurity regulation frameworks. WHAT YOU’LL DO Build IT infrastructure at all classification levels and a variety of handling requirements (SAP, SCI) in ways that have not previously been done in classified spaces Design, install, operate, maintain and troubleshoot classified IT systems consisting of a variety of operating systems (mainly Linux and Windows) and hardware Work in close coordination with the ISSM and ISO in monitoring the information system(s) implementing configuration management across authorization boundaries Serve as subject matter expert for classified IT matters that require escalation Define, document and follow standards and best practices for systems design, testing, and implementation Drive scripting and automation to develop solutions to common problems REQUIRED QUALIFICATIONS Experience managing Windows Server and Windows Active Directory; to include file and print services, DNS, Domain Controllers, and application servers Familiar with administration of Linux-based systems Fundamental understanding of networking Experience in unclassified, internet exposed environments to inform parity of classified environments Understanding of basic security best-practices and hardening of Microsoft environments Experience working with virtualized infrastructure (e.g., ESXi, Linux KVM, Hyper‑V, Docker) Previous experience deploying IT systems from scratch Must possess and be able to maintain a U.S. TS Security clearance PREFERRED QUALIFICATIONS Previous support to classified IT systems Experience with a scripting language (Bash, Python, etc.) to automate and solve reoccurring tasks Active TS/SCI/ISSA Clearance US Salary Range $136,000 — $275,000 USD The salary range for this role is an estimate based on a wide range of compensation factors, inclusive of base salary only. Actual salary offer may vary based on (but not limited to) work experience, education and/or training, critical skills, and/or business considerations. Highly competitive equity grants are included in the majority of full time offers; and are considered part of our client's total compensation package. Additionally, our client offers top-tier benefits for full-time employees, including: Platinum Healthcare Benefits: For U.S. roles, we offer top tier platinum coverage (medical, dental, vision) that are 100% covered by our client for you and 90% covered for your dependents. For UK roles, Private Medical Insurance (PMI): Our client will cover the full cost of the insurance premium for an employee and dependents. For AUS roles, Private health plan through Bupa: Coverage is fully subsidized by our client. Basic Life/AD&D and long-term disability insurance 100% covered by our client, plus the option to purchase additional life insurance for you and your dependents. Extremely generous company holiday calendar including a holiday hiatus in December, and highly competitive PTO plans. 16 weeks of paid Caregiver & Wellness Leave to care for a family member, bond with your baby, or tend to your own medical condition. Family Planning & Parenting Support: Fertility (eg, IVF, preservation), adoption, and gestational carrier coverage with additional benefits and resources to provide support from planning to parenting. Mental Health Resources: We provide free mental health resources 24/7 including therapy, life coaching, and more. Additional work-life services, such as free legal and financial support, available to you as well. A professional development stipend is available to all OUR CLIENTians. Daily Meals and Provisions: For many of our offices this means breakfast, lunch and fully stocked micro-kitchens. Company-funded commuter benefits available based on your region. Relocation assistance (depending on role eligibility). 401(k) retirement savings plan - both a traditional and Roth 401(k). (US roles only) #J-18808-Ljbffr
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$146k - $194k
Anduril Industries is a defense technology company with a mission to... ...Anduril is changing how military systems are designed, built and sold.... ...JOB We're seeking a skilled Classified Systems Administrator with expertise... ...to provide comprehensive IT support across our classified...SuggestedFull timeWork experience placementImmediate start- ...Engineers will have: ~5+ years of technical experience on Linux Systems. ~ A Bachelor's degree in Info Systems, Computer Science, or... ...Patching. ~ Experience with integration. ~ TS/SCI + FS Poly This work is full time on-site in Ashburn-VA. US Citizenship...SuggestedFull timeContract workImmediate start
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Classified Windows System Administrator The Aerospace Corporation is the trusted partner... ..., and cyber systems for defense, civil and commercial... ...reinforcing a stable and resilient IT foundation. What You Need to... ...well as Hyper-V and Windows Admin Center for robust...SuggestedFull timeImmediate startRemote workRelocation packageFlexible hours$146k - $194k
Anduril Industries is a defense technology company with a mission to transform... ...Anduril is changing how military systems are designed, built and sold.... ...DO:Provide 1st, 2nd, and 3rd tier IT support to Anduril employees across classified systems.Install, operate, maintain...SuggestedFull timeWork experience placementImmediate start$112k - $149k
Anduril Industries is a defense technology company with a mission to transform U.S. and... ...industry, Anduril is changing how military systems are designed, built and sold. Anduril’s... ...servers, laptops, network switches) in classified IT systems.Strong understanding of system updating...Full timeWork experience placementImmediate start$130k - $180k
...014, specializing in providing expert Federal IT support and management services. Our comprehensive offerings include systems integration, IT security, continuity of business... ...experience Active TS/SCI clearance w/CI Poly AWS Certified Cloud Practitioner certification...Daily paidContract workTemporary workImmediate startFlexible hours$142.79k - $238.45k
...Systems Administrator SME (TS/SCI with Poly Required) Job Category : IT Infrastructure and Operations Requisition Number : SYSTE002208 Posted : July 9, 2026 Full-Time On-site Salary Range : $142,792 USD to $238,451.20 USD Locations Showing 1 location...Full time- ...System AdministratorThe Aerospace Defense, Space & Security (BDS), Maritime and Intelligence Systems (M&IS) seeks... ...and maintenance of an organization's IT infrastructure, including servers, VMs... ...: A current Full Scope intelligence Poly (FSP). System Administration...
$150k - $220k
...– $220,000Company Overview: Cornerstone Defense is the Employer of Choice within the Intelligence... ...documentation of requirements for both classified and unclassified network transport... ...proper integration into existing systems to meet customer needs, as directed.Lead...Contract work- ...ideal candidate has 5+ years of Linux experience, a Bachelor's in Information Systems or Computer Science, and strong scripting (Python, SQL, JavaScript, Bash). US Citizenship and TS/SCI + FS Poly clearance are required. Our client offers 100% employer-paid medical and...
$176k - $282k
...Peraton in Chantilly, Virginia is seeking a Network Security Engineer to enhance and protect its cyber defenses. Ideal candidates should have significant experience in network security engineering, proficiency in scripting and a strong understanding of networking principles...- ...Ideal for someone with a foundation in IT systems, infrastructure, technical support, or networking... ...security investigation for access to classified information.* ABOUT US At MGS, we... ...community, the US Department of Defense, and other governmental agencies. We create...Full time
- ...with purpose - and help shape the future. MITRE's Classified Infrastructure is looking for a Senior Systems Administrator to be part of a distributed team. A... ...Escalation and Collaboration: Collaborate with higher-level IT teams or vendors to escalate complex issues,...Work experience placementInternshipLocal areaImmediate start
$122k - $253k
...advanced full-spectrum cyber, data operations, systems integration and intelligence mission... ...include cyber space operations, cyber defense and resiliency, vulnerability research, ubiquitous... ...QualificationsCurrent TS/SCI with Poly ClearanceMinimum 3 years of professional...Full timeContract work$104k - $166k
...seeking a Mid-Level Infrastructure Systems Administrator in our Chantilly... ...support of our Department of Defense (DoD) community customer as... ...do: Support our cloud-based classified environment, ensuring the uptime... ...and transformative enterprise IT provider, we deliver trusted,...Contract workWork at officeShift work$122k - $253k
...spectrum cyber, data operations, systems integration and intelligence... ...cyber space operations, cyber defense and resiliency, vulnerability... ...Sterling, VAClearance: TS/SCI Poly**This position is CONTINGENT upon... ..., system analysis, and IT operations support. Daily tasks...Full timeContract work$146k - $194k
Anduril Industries is a defense technology company with a mission to transform U.S. and allied... ..., Anduril is changing how military systems are designed, built and sold. Anduril’s family... ...an email from one of our recruiters, it will only come from an @anduril.com address...Full timeWork experience placementImmediate start- ...deployment coordination for DC-MLS deployments, including HPC programs and related contracts. Qualified candidates will have TS/SCI CI Poly clearance, 5+ years in Linux, scripting, and configuration management, and strong skills in Python, Perl, Korn, Bourne/Bash, and...
$132.96k - $226.04k
...Systems AdministratorAt BAE Systems, we believe your career should... ...technology that directly aids in the defense of national security. As part... ...to our team supporting a classified customer in the Intelligence Community... ...problemsKnowledge of complex IT environments involving shared...Full timeLocal areaWorldwide- ...multiple Secret Server Deployments. Responsibilities include: tools deployment and configuration; supporting day-to-day operations; system health and status checks, identifying capacity, performance, reliability issues, and escalation for resolution; applying patches...
- ...Job Description Job Description IT System Administrator TS/SCI CI poly Department: Government Customer- Chantilly Location: Chantilly, VA TENICA is looking to hire an IT System Administrator. Responsibilities: - Perform O&M functions needed to...Work at office
$122k - $253k
...advanced full-spectrum cyber, data operations, systems integration and intelligence mission... ...include cyber space operations, cyber defense and resiliency, vulnerability research, ubiquitous... ...QualificationsCurrent TS/SCI with Poly ClearanceMinimum of three (3) years of hands...Full timeContract work$132.96k - $226.04k
Systems Administrator At BAE Systems, we believe your career should... ...technology that directly aids in the defense of national security. As part... ...to our team supporting a classified customer in the Intelligence Community... ...problems Knowledge of complex IT environments involving shared...Full timeLocal areaWorldwide- System Administrator System Administrator Herndon, VA Active TS/SCI... ...Company Overview: Cornerstone Defense is the Employer of Choice within... ...represent the entire System Admin Team during high impact operations... ...Cloud, INFOSEC, or any recent IT certifications Previous shift-...Work experience placementShift workNight shift
- Systems Administrator Job Locations US ID 2025-4271 Category Defense Type Full Time Overview Amyx is seeking to hire a Systems Administrator for our Defense Logistics... ...issues with various software. Must possess IT-I Critical Sensitive security clearance or Tier...Full timeTemporary workFor contractorsLocal areaRemote workFlexible hours
- ...supporting day-to-day operations; system health and status checks,... ...Clearance; willingness to obtain a CI Poly ~ Must meet the DoD 8570... ...owned, highly regarded IT consulting and management firm... ...consults for the Department of Defense (DoD) and Intelligence Community...Temporary workRelocation package
- Senior Windows Systems Administrator ACTIVE TS/SCI CLEARANCE with FS poly REQUIRED TO BE CONSIDERED FOR THIS POSITION Attend TEMs to discuss and agree upon MOAs... ...and consulting solutions in the areas of national defense, homeland and cyber security. TENICA provides...Remote work
- ...We are searching for a Systems Administrator to join the Reston, VA location of the Digital Engineering Department in the Cyber,... ...simulation (M&S) applications Current eligibility for access to classified information at the Secret level or higher and may be subject...Full timeWork at officeImmediate start
$73.45k - $132.78k
Leidos is seeking a System Administrator to be part of a team responsible for the implementation of quick turnaround desktop, video, and... ...degreeClearance: Must have an active Top Secret/SCI clearance w/Poly to be consideredStrong interpersonal and customer service...Full timeRemote workShift work
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