ManTech is looking for a Linux Systems Administrator who will be responsible for maintaining and administering our servers and related computing environments including systems software, applications software, hardware, and configurations. This position plays a crucial role in ensuring the integrity and operation of IT systems within mission-critical national security programs. The ideal candidate should possess a strong understanding of Linux systems and a keen ability to troubleshoot and optim…

ManTech is looking for a Linux Systems Administrator who will be responsible for maintaining and administering our servers and related computing environments including systems software, applications software, hardware, and configurations. This position plays a crucial role in ensuring the integrity and operation of IT systems within mission-critical national security programs. The ideal candidate should possess a strong understanding of Linux systems and a keen ability to troubleshoot and optim…

ManTech is looking for a Linux Systems Administrator who will be responsible for maintaining and administering our servers and related computing environments including systems software, applications software, hardware, and configurations. This position plays a crucial role in ensuring the integrity and operation of IT systems within mission-critical national security programs. The ideal candidate should possess a strong understanding of Linux systems and a keen ability to troubleshoot and optim…

Job Title: Linux Senior System Administrator - Desktop Services Job Category: Information Technology Time Type: Full time Minimum Clearance Required to Start: TS/SCI with Polygraph Employee Type: Regular Percentage of Travel Required: Up to 10% Type of Travel: Local * * * The Opportunity At CACI, we specialize in providing innovative and secure IT solutions to our clients in the defense and national security sectors. Our mission is to support critical infrastructure with the highest standards o…

Essential Functions: Experience in Risk Management Framework (RMF) accreditation and authorization (A&A) processes and standard body of evidence (BoE) package development. Experience with A&A package processing Experience in DoD software selection and approval processes for COTS, GOTS and FOSS. Experience in the application of DISA SRGs and STIGs. Experience in the implementation and use of cybersecurity tools (e.g. ACAS, SCAP, etc.). Experience with container security Support security engineer…

Principal Systems Administrator to join our dynamic team of technical professionals in Linthicum, MD. Note- The selected candidate will be required to work on-site, full-time, at our Linthicum, MD campus. This is not a virtual position. Candidates MUST possess a current TS/SCI to include a current and recently adjudicated [within the last 5 years] Polygraph in order to be considered. Roles and responsibilities will include but not be limited to the following: Perform as primary Linux Systems Ad…

Position: System Administrator (Linux & Windows Workstations) Client: L3Harris Location: Waco, TX (100% Onsite) Duration: 12 Months Contract (Temp to Perm) Schedule: 9/80 Work Schedule | 8:00 AM Shift Pay Rate: Up to $70/hr on W2 Position Summary The System Administrator will be responsible for deploying, securing, maintaining, and supporting Linux and Windows desktop and laptop environments used by engineering and technical teams. This role includes workstation administration, virtualization s…

Active TS/SCI w/Polygraph REQUIRED Please do not apply if you do not currently possess this level of clearance. Telework: None Basic Requirements: * 20 years experience as a system engineer * Bachelor's degree in a technical discipline * 5 additional years of experience as a system engineer may be substituted for a degree Required Experience: * RedHat Linux * Ansible * VMWare Excellent benefits package including 25 days PTO, 11 paid holidays, 100% employer-paid healthcare for employees and de…

Job Description: Quevera is seeking a highly skilled Linux Systems Administrator with an active TS/SCI clearance with Polygraph to support mission-critical programs in Fort Meade, Maryland. In this role, you will support enterprise Linux environments operating across multiple networks, architectures, and hybrid cloud infrastructures. You will be responsible for building, maintaining, securing, and optimizing Linux systems while leveraging automation to improve operational efficiency and reliabi…

Essential Functions: Experience in Risk Management Framework (RMF) accreditation and authorization (A&A) processes and standard body of evidence (BoE) package development. Experience with A&A package processing Experience in DoD software selection and approval processes for COTS, GOTS and FOSS. Experience in the application of DISA SRGs and STIGs. Experience in the implementation and use of cybersecurity tools (e.g. ACAS, SCAP, etc.). Experience with container security Support security engineer…

Leidos Corporate Information Security Office (CISO), reporting through the Digital sector, is seeking a Linux and Windows System Administrator to support and maintain complex classified environments. The selected candidate will be responsible for administering, securing, troubleshooting, and maintaining Windows and Linux systems across physical and virtual infrastructures. This role supports mission-critical operations by ensuring system availability, compliance with security requirements, and …

Company Description We were early to the fight against Ubiquitous Technical Surveillance, and we've been pushing the edge ever since. Our mission is to help government and enterprise organizations understand and manage commercial data risks, shape their digital signatures, and operate with confidence in an increasingly complex information landscape. We build and integrate advanced, tech-forward solutions to problems our customers often don't know they have - until it matters most. We move fast,…

Essential Functions: Experience in Risk Management Framework (RMF) accreditation and authorization (A&A) processes and standard body of evidence (BoE) package development. Experience with A&A package processing Experience in DoD software selection and approval processes for COTS, GOTS and FOSS. Experience in the application of DISA SRGs and STIGs. Experience in the implementation and use of cybersecurity tools (e.g. ACAS, SCAP, etc.). Experience with container security Support security engineer…

Essential Functions: Experience in Risk Management Framework (RMF) accreditation and authorization (A&A) processes and standard body of evidence (BoE) package development. Experience with A&A package processing Experience in DoD software selection and approval processes for COTS, GOTS and FOSS. Experience in the application of DISA SRGs and STIGs. Experience in the implementation and use of cybersecurity tools (e.g. ACAS, SCAP, etc.). Experience with container security Support security engineer…

Essential Functions: Experience in Risk Management Framework (RMF) accreditation and authorization (A&A) processes and standard body of evidence (BoE) package development. Experience with A&A package processing Experience in DoD software selection and approval processes for COTS, GOTS and FOSS. Experience in the application of DISA SRGs and STIGs. Experience in the implementation and use of cybersecurity tools (e.g. ACAS, SCAP, etc.). Experience with container security Support security engineer…

Software Integration Engineer (Levels 1–3) EMTAK is hiring multiple Site Reliability Engineers (SREs) / Software Integration Engineers to support a rapidly growing Intelligence Community program. We are seeking engineers with a strong Linux background to support mission operations infrastructure and software integration. The ideal candidate will have experience with Linux system administration, automation, monitoring, troubleshooting, and improving system reliability in mission-critical environ…

Date Posted: 2026-07-08 Country: United States of America Location: US-MA-MARLBOROUGH-MA4 ~ 1001 Boston Post Rd ~ BLDG 4 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: The ability to obtain and maintain a U.S. government issued security clearance is required.? U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance Security Clearance Type: DoD Clearance: Top Secret Security Clearance Status: Active and existing securit…

Job Description Job Description JOB DESCRIPTION Watershed Security, is a Veteran Owned Small Business with over 20 years’ Cybersecurity and Government Contracting experience. Watershed is looking for a hands-on Unix/Linux Systems Administrator to support NSWCDD.; onsite in Dahlgren, VA. REQUIRED QUALIFICATIONS Key ResponsibilitiesThree (3) years of professional experience in UNIX and/or Linux System Administration of networks and software systems. Experience in system backup and recovery; basic…

Nightwing provides technically advanced full-spectrum cyber, data operations, systems integration and intelligence mission support services to meet our customers' most demanding challenges. Our capabilities include cyber space operations, cyber defense and resiliency, vulnerability research, ubiquitous technical surveillance, data intelligence, lifecycle mission enablement, and software modernization. Nightwing brings disruptive technologies, agility, and competitive offerings to customers in t…

What Impact You'll Have: Tailored Access, a GRVTY Company is seeking Systems Administrators to support Department of Defense/IC missions at Fort Meade, MD. You will be responsible for Linux Systems Administration while supporting IC missions that are vital to our national security. What You'll be Owning * Perform Linux system administration functions. * Stand up, configure, and maintain Linux servers. * Monitoring and patching/upgrades to standard networking resources (routers, switches, firewa…