Showing page 4 of 260 (Total listings: 5190)
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Savage, Anne Arundel County
Aug 24, 2026

Job Description CDIT is a technology solutions company supporting government and national security customers with secure, mission-focused IT solutions. We partner with highly skilled technical professionals to support complex environments where reliability, security, and operational excellence are critical. Our team values technical expertise, collaboration, and a commitment to supporting the missions of our customers. CDIT is seeking an experienced Linux System Administrator to support a secur…

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Belle Isle, Hancock County
Aug 14, 2026

R-00189488 Description Are you a Linux Systems Administrator ready to take your skills beyond the traditional enterprise environment? Leidos is seeking a Mid-Level Linux Systems Administrator to support one of the Department of War's (DoW) largest High Performance Computing (HPC) environments at Stennis Space Center, Mississippi. In this role, you'll work alongside a highly skilled technical team supporting advanced supercomputing resources used by scientists and engineers to solve complex comp…

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Fort George G Meade, Anne Arundel County
Aug 3, 2026

MANTECH seeks an experienced and passionate, career and customer-oriented Linux System Administrator to join our team in Ft. Meade, MD. Responsibilities include but are not limited to: * Creating and managing virtual environments * Systems administration of hardware and software in support of maintenance, developing and testing of information technology systems * Administration of Linux (i.e., Redhat/Rocky 8) * Scripting with Basic Shell (Bash), PUTTY * Configuring and maintaining storage and f…

Linux System Administrator with Security Clearance

Johns Hopkins University Applied Physics Laboratory ✓ Verified
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North Laurel, Prince George's County
Oct 6, 2026

Description Are you passionate about shaping secure, IT systems in classified environments? Do you want to influence system improvements, implementation decisions, and the overall security posture of advanced technology systems? If so, we're looking for someone like you to join our team at APL! We are seeking a Linux System Administrator to join the Weapons and Countermeasures group to support secure Analysis Facilities. In this role, you will apply Risk Management Framework (RMF) principles, d…

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Pinecraft, Sarasota County
May 25, 2026

Job Title: Linux System Administrator 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: Continental US * * * The Opportunity: CACI has an immediate opening for a Linux Systems Administrator, with a Top Secret Clearance (TS/SCI) with polygraph for our corporate development/test network and fielded systems. CACI is seeking a development Systems Adminis…

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Suitland, Prince George's County
Oct 6, 2026

R-00193935 Description Linux Systems Administrator Location: Suitland, MD Security Clearance: Active TS/SCI Required Leidos is seeking an experienced Linux Systems Administrator to support mission‑critical Scientific & Technical Intelligence (S&TI) systems at the Office of Naval Intelligence (ONI) in Suitland, MD. This role provides advanced Linux, cybersecurity, and enterprise infrastructure support within a dynamic classified environment enabling engineering analysis, modeling, and high‑perfo…

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Silver Spring, Montgomery County
Sep 23, 2026

About Peraton Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world's leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies. Peraton operates at the critical nexus between traditional and nontraditional threats across all domains: land, sea, space,…

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Fort George G Meade, Anne Arundel County
Sep 1, 2026

MANTECH seeks an experienced and passionate, career and customer-oriented Linux Systems Administrator to join our team located in the Fort Meade, MD area. Responsibilities include, but are not limited to: * Provide comprehensive administration and support for multi-platform operating system environments. * Design and implement automated security hardening solutions to enhance scalability and streamline operating system deployments. * Configure and maintain host-based security and intrusion dete…

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College Park, Prince George's County
Sep 23, 2026

About Peraton Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world's leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies. Peraton operates at the critical nexus between traditional and nontraditional threats across all domains: land, sea, space,…

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Wattsville, Accomack County
Sep 17, 2026

Job Description B A E Systems is seeking a Linux Systems Administrator with Red Hat Enterprise Linux (RHEL) experience. In this role, you will administer servers and perform cybersecurity functions to support a research, development, test, and evaluation (RDT&E) environment. You will build, configure, test, diagnose, repair server operating systems and applications, and automate tasks using scripts. To test connectivity and diagnose issues, you will also need some proficiency with Cisco operati…

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Hampton Roads, Hampton City
Oct 3, 2026

Job Title: Linux Systems Administrator Job Category: Information Technology Time Type: Full time Minimum Clearance Required to Start: TS/SCI Employee Type: Regular Percentage of Travel Required: Up to 10% Type of Travel: Continental US * * * The Opportunity: We are seeking a cleared, skilled and experienced Red Hat Enterprise Linux Administrator with expertise in Puppet configuration management to join our IT team. The ideal candidate will play a crucial role in integrating, maintaining and opt…

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Hampton Roads, Hampton City
Oct 14, 2026

EverWatch is a government solutions company providing advanced defense, intelligence, and deployed support to our country’s most critical missions. We are a full-service government solutions company. Harnessing the most advanced technology and solutions, we strengthen defenses and control environments to preserve continuity and ensure mission success. EverWatch employees are focused on tackling the most difficult challenges of the US Government. We offer the best salaries and benefits packages …

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Lexington, Middlesex County
Sep 12, 2026

Linux System Administrator Clearance Level: Must have an Active Secret Clearance to be considered for this opportunity – Must be a US Citizen Location: Hybrid but must live within 100 miles from Lexington, MA At Aquila Technology, you will see our team’s passion every day, whether we are building a robust, policy-compliant IT system or stress-testing a system to identify gaps and security vulnerabilities. To own the advantage, we ensure our team owns results and gets the work done right the fir…

Linux System Administrator with Security Clearance

By Light Professional IT Services ✓ Verified
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Pimmit, Fairfax County
Oct 13, 2026

Company Overview By Light Professional IT Services LLC readies warfighters and federal agencies with technology and systems engineered to connect, protect, and prepare individuals and teams for whatever comes next. Headquartered in McLean, VA, By Light supports defense, civilian, and commercial IT customers worldwide. Position Overview By Light has an opening for a Sr. Systems Administrator (Linux/Unix) position supporting the Army National Guard (ARNG) in Falls Church, VA. This is an IT Servic…

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New York, US
Oct 9, 2026

Linux System Administrator This role is five days per week onsite in New York City. Outstanding compensation and benefits. Our client is a mid-size trading firm, a L inux shop both on the server side and the trader desktops. Windows administration skills are a plus. Interaction with users frequently, requiring good communication skills. About the Role Hands-on professional responsible for the workstations and servers of our trading operation. All systems work is on desktops, servers and in the …

Linux System Administrator

CACI International ✓ Verified
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Washington, D.C., US
Aug 28, 2026

Job Title: Linux System Administrator Job Category: Information Technology Time Type: Full time Minimum Clearance Required to Start: None Employee Type: Regular Percentage of Travel Required: None Type of Travel: None * * * The Opportunity: CACI is searching for a Linux System Administrator to support the FEMA Office of the Chief Information Security Officer (OCISO) in Washington, D.C. As a Linux System Administrator, you will play a crucial role in ensuring the security and operational resilie…

Linux Systems Administrator

ASRC Federal Holding Company ✓ Verified
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Aberdeen, Harford County
Sep 19, 2026

ASRC Federal is a leading government contractor furthering missions in space, public health and defense. As an Alaska Native owned corporation, our work helps secure an enduring future for our shareholders. Join our team and discover why we are a top veteran employer and Certified Great Place to Work ASRC Federal Technology Solutions LLC is looking for a Linux System Administrator with a minimum of an active Secret clearance to support their work with DEVCOM-CBC and the Transformation Decision …

Linux Systems Administrator

Leidos ✓ Verified
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Suitland, Prince George's County
Oct 9, 2026

Description Linux Systems Administrator Location: Suitland, MD Security Clearance: Active TS/SCI Required Leidos is seeking an experienced Linux Systems Administrator to support mission‑critical Scientific & Technical Intelligence (S&TI) systems at the Office of Naval Intelligence (ONI) in Suitland, MD . This role provides advanced Linux, cybersecurity, and enterprise infrastructure support within a dynamic classified environment enabling engineering analysis, modeling, and high‑performance com…

Linux Systems Administrator

BWX Technologies, Inc. ✓ Verified
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Oak Ridge, Anderson County
Sep 11, 2026

At BWX Technologies, Inc. (NYSE: BWXT), we are People Strong, Innovation Driven. A U.S.-based company, BWXT is a Fortune 1000 and Defense News Top 100 manufacturing and engineering innovator that provides safe and effective nuclear solutions for global security, clean energy, environmental restoration, nuclear medicine and space exploration. With more than 7,800 employees, BWXT has 14 major operating sites in the U.S., Canada and the U.K. We are the sole manufacturer of naval nuclear reactors f…

Linux System Administrator

Teledyne ✓ Verified
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Redstone Arsenal, Madison County
Sep 13, 2026

US - Huntsville, AL (Arsenal) Full time REQ33648 Be visionary Teledyne Technologies Incorporated provides enabling technologies for industrial growth markets that require advanced technology and high reliability. These markets include aerospace and defense, factory automation, air and water quality environmental monitoring, electronics design and development, oceanographic research, deepwater oil and gas exploration and production, medical imaging and pharmaceutical research. We are looking for…

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