Windows Linux Systems Administrator - TS/SCI with Polygraph Jobs

161 - 180 of 746 Jobs

Senior Systems AdministratorJob Title - Senior Systems Administrator

General Dynamics Information TechnologyCompany Name - General Dynamics Information Technology

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Mary Esther, Florida, USA

Full-time

Type of Requisition: Regular Clearance Level Must Currently Possess: Interim Secret Clearance Level Must Be Able to Obtain: Top Secret/SCI Public Trust/Other Required: None Job Family: Systems Administration Job Qualifications: Skills: Linux, System Administration, Virtual Environments, Virtualization, VMware Certifications: None Experience: 3 + years of related experience ship Required: Yes Job Description: Seize your opportunity to make a personal impact as a Senior Systems Administra

System Administrator 4Job Title - System Administrator 4

Boeing CompanyCompany Name - Boeing Company

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Herndon, Virginia, USA

Full-time

This posting is for a contract assignment and is not a full-time employment offer with Boeing. Candidates selected for roles will be employed as contract workers through a Boeing approved 3rd party for the duration of the specified project. The Boeing Defense, Space & Security (BDS), Maritime and Intelligence Systems (M&IS) seeks a System Administrator to join our Mission Systems Operations team in Herndon, VA. Our team focuses on delivering complex solutions in some of the most challenging envi

Senior Engineer, Cybersecurity AutomationJob Title - Senior Engineer, Cybersecurity Automation

Intercontinental Exchange Holdings, Inc.Company Name - Intercontinental Exchange Holdings, Inc.

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Atlanta, Georgia, USA

Full-time

Overview Job Purpose The ICE Cybersecurity Automation team is responsible for global information security workflow automation in a highly-regulated critical financial infrastructure environment. The Senior Engineer Cybersecurity Automation will be actively engaged in the development of software that ensures efficient and effective risk management throughout the information security lifecycle across the Red Team, Blue Team, Threat Intelligence, Application Security, Governance, Risk and Complianc

Junior Systems Engineer (Active Secret Clearance)Job Title - Junior Systems Engineer (Active Secret Clearance)

TEKsystems c/o Allegis GroupCompany Name - TEKsystems c/o Allegis Group

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Fort Walton Beach, Florida, USA

Full-time

Description TEKsystems is seeking a highly motivated Junior Systems Engineer with foundational experience in systems administration, virtualization, and automation tools. The engineer will assist in supporting and deploying infrastructure solutions across classified environments, including Windows and Linux systems, virtual machines, and enterprise applications. This role offers the opportunity to work alongside experienced engineers and contribute to secure, resilient architectures used by rese

Systems EngineerJob Title - Systems Engineer

TEKsystems c/o Allegis GroupCompany Name - TEKsystems c/o Allegis Group

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Fort Belvoir, Virginia, USA

Full-time

This position requires an active DoD Clearance (Secret, Top Secret, Top Secret/SCI) or the ability to be obtain an (Interim Secret, Interim Top Secret) Because an active or interim DoD clearance is required, U.S. Citizenship is required Description TEKsystems' Customer is seeking a SME Systems Engineer to support large-scale migration and operations on a large, high-profile DOD contract. The I3TS program provides enterprise-wide IT support to enable DTRA's Information Management & Technology Di

Cyber Systems Security Engineer Senior - Eglin AFBJob Title - Cyber Systems Security Engineer Senior - Eglin AFB

Lockheed Martin CorporationCompany Name - Lockheed Martin Corporation

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Eglin Air Force Base, Florida, USA

Full-time

Job Description What We're Doing At Lockheed Martin, we are pushing the boundaries of innovation to solve some of the world's most complex challenges. In our Rotary and Mission Systems (RMS) division, we are focused on advancing security and resilience for critical defense systems, with a particular emphasis on F-35 Training & Logistics. Our team is dedicated to applying cutting-edge cybersecurity solutions that safeguard the integrity of systems throughout their lifecycle. We are passionate a

Sr. Systems AdministratorJob Title - Sr. Systems Administrator

EsriCompany Name - Esri

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Remote

Full-time

Overview Seeking highly motivated IT professional that's looking for a challenging position with a variety of responsibilities. We have an opening that will allow you to utilize your technical expertise to help build, secure, and grow enterprise scale infrastructure in a fast-paced environment. If you have a drive for success and work well with a diverse team, let's talk, and see if Esri is the right fit for your career. Responsibilities Provide support and maintenance for Microsoft Active Dir

System AdministratorJob Title - System Administrator

SAICCompany Name - SAIC

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Fort Meade, Maryland, USA

Full-time

Job ID: 2506155 Location: FORT MEADE, MD, US Date Posted: 2025-06-18 Category: Information Technology Subcategory: Sys Administrator Schedule: Full-time Shift: Day Job Travel: No Minimum Clearance Required: TS/SCI with Poly Clearance Level Must Be Able to Obtain: None Potential for Remote Work: No Description SAIC, a leading provider of systems engineering & integration, systems development & deployment, intelligence analysis and targeting, and training solutions for the Intelligence

System Administrator Cross-PlatformJob Title - System Administrator Cross-Platform

RTX CorporationCompany Name - RTX Corporation

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El Segundo, California, USA

Full-time

Date Posted: 2025-07-14 Country: United States of America Location: CA222: 2006 E El Segundo Blvd BldgE04 2006 East El Segundo Boulevard Building E04, El Segundo, CA, 90245 USA Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: Active and transferable U.S. government issued security clearance is required prior to start date.Security Clearance: DoD Clearance: Secret At Raytheon, the foundation of everything we do is rooted in our values and a higher calli

Sr. Software Engineer-Automated Test Framework TS/SCI PolyJob Title - Sr. Software Engineer-Automated Test Framework TS/SCI Poly

LeidosCompany Name - Leidos

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Annapolis, Maryland, USA

Full-time

Leidos has a new and exciting opportunity for an Automated Test Framework Software Engineer in our National Security Sector's (NSS) Cyber & Analytics Business Area (CABA). 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

System Administrator Level IVJob Title - System Administrator Level IV

General DynamicsCompany Name - General Dynamics

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Laurel, Maryland, USA

Part-time

Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret SCI + Polygraph Clearance Level Must Be Able to Obtain: Top Secret SCI + Polygraph Public Trust/Other Required: None Job Family: Systems Administration Job Qualifications: Skills: Active Directory (AD), Operating Systems (OS), OS Configuration, PC Installation Certifications: None Experience: 10 + years of related experience ship Required: Yes Job Description: System Administrator Level IV Description: Manag

Linux Systems AdministratorJob Title - Linux Systems Administrator

LeidosCompany Name - Leidos

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Beavercreek, Ohio, USA

Full-time

Are you ready to make an impact? Leidos Chief Information Security team within the Digital Modernization sector is seeking an experienced Linux Systems Administrator to work onsite in Beavercreek, Ohio. You will bring Linux skills to perform testing, deploying, maintaining, and administering cyber systems across networks along with their infrastructure of hardware/software. Daily duties may include protecting, configuring and managing servers and computers systems, installing software and syste

System AdministratorJob Title - System Administrator

Lockheed Martin CorporationCompany Name - Lockheed Martin Corporation

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Hurlburt Field, Florida, USA

Full-time

Job Description WHAT WE'RE DOING At Lockheed Martin, we're revolutionizing the aerospace and defense sector through groundbreaking technology, advanced manufacturing processes, and a world-class team of professionals. Our mission-driven approach and unwavering dedication to excellence ensure that we continue to deliver superior products and solutions to our customers around the world. THE WORK Lockheed Martin is seeking a System Administrator to join our Information Technology team supporting

System Administrator Level IVJob Title - System Administrator Level IV

General Dynamics Information TechnologyCompany Name - General Dynamics Information Technology

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Laurel, Maryland, USA

Part-time

Jr Systems EngineerJob Title - Jr Systems Engineer

TEKsystems c/o Allegis GroupCompany Name - TEKsystems c/o Allegis Group

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Fort Walton Beach, Florida, USA

Full-time

Description TEKsystems is seeking a highly motivated Jr Systems Engineer with foundational experience in systems administration, virtualization, and automation tools. The engineer will assist in supporting and deploying infrastructure solutions across classified environments, including Windows and Linux systems, virtual machines, and enterprise applications. This entry-level role offers the opportunity to work alongside experienced engineers and contribute to secure, resilient architectures used

SCCM/ECM System AdministratorJob Title - SCCM/ECM System Administrator

CCS Global TechCompany Name - CCS Global Tech

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Pontiac, Michigan, USA

Contract, Third Party

CCS Global Tech is a rapidly growing Information Technology company with a diverse portfolio of technology products and services and a large network of industry partnerships. With over 22 years of being a successful business with a global talent pool and presence, CCS is a certified Microsoft Gold Partner and specializes in delivering expert Microsoft based solutions for technical and business needs. We have been recognized by Inc. 500 Magazine as one of the fastest growing small companies in th

Sr. Software Engineer-Automated Test Framework TS/SCI PolyJob Title - Sr. Software Engineer-Automated Test Framework TS/SCI Poly

LeidosCompany Name - Leidos

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Maryland, USA

Full-time

Description Leidos has a new and exciting opportunity for an Automated Test Framework Software Engineer in our National Security Sector's (NSS) Cyber & Analytics Business Area (CABA). 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% c