Windows Linux Systems Administrator - TS/SCI with Polygraph Jobs

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Sr Site Reliability Engineer

Medline Industries, LP

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Northbrook, Illinois, USA

Full-time

Job Summary Job Description Job Description Medline Industries is seeking a Senior Site Reliability Engineer to support the infrastructure platforms powering our Supply Chain systems. This role blends traditional platform engineering with site reliability practices, ensuring that systems are stable, secure, and deployment-ready across on-prem and cloud environments. The ideal candidate will have strong systems administration experience, scripting ability, and an interest in driving reliabilit
Posted 29 days ago | Updated 8 hours ago

Systems Network Engineering Support Specialist

General Dynamics

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Scottsdale, Arizona, USA

Full-time

Basic Qualifications Requires a Bachelor's or Technology degree in Engineering or a related specialized area/field, or equivalent (4 years job-related experience). Requires an additional 8+ years of job-related experience, or a Master's degree with 6+ years of job-related experience. CLEARANCE REQUIREMENTS: Department of Defense TS/SCI security clearance with Full Scope Polygraph is required at time of hire. Applicants selected will be subject to a U.S. Government security investigation and mu
Posted 48 days ago | Updated 11 hours ago

Senior Network Engineer - TS/SCI w/Poly

Jacobs

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Annapolis, Maryland, USA

Full-time

Your Impact: Are you interested in using your skills to help shape the Cyber, Security, & Intel space? If so, look no further. Amentum is seeking a Senior Network Engineer to join our team of passionate individuals in Annapolis Junction, MD. In this role you will support challenging, mission-critical projects that make a direct impact on the Nation's security and intelligence mission. As the lead of technical efforts across organizations, you will manage the overall operational health of a cus
Posted 7 days ago | Updated 11 hours ago

Professional Services Engineer - (TS/SCI Full Poly)

Corelight, Inc.

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No location provided

Full-time

Towards the end of our interview process is an in-person interview. Do you want to help make the world safe from cyber attack? At Corelight, we believe that the best approach to cybersecurity risk starts with the network. Attackers can evade endpoint detection, firewalls and many other technologies - but they can't avoid leaving digital footprints on the networks they traverse. Built on open-source innovations from Zeek, Suricata and YARA and refined through years of real-world use, Corelight t
Posted 23 hours ago | Updated 11 hours ago

Systems Administrator

Booz Allen Hamilton

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Offutt Air Force Base, Nebraska, USA

Full-time

Job Number: R0222258 Systems Administrator The Opportunity: Your combination of people skills and system administrator expertise makes you the team hero, solving one problem after another. What if you could use those skills to improve the technology supporting USSTRATCOM? We're looking for a system administrator with a background in Windows or Linux to help us continue the development of the Joint Integrated Missile Defense and Missile Warning Training System (JIMDTS). As a system administrator
Posted 28 days ago | Updated moments ago

System Administrator

The Friedkin Group

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Houston, Texas, USA

Full-time

Y our Assignment at a Glance The Systems Administrator supports the day-to-day operations of business-critical applications and server infrastructure at the Vehicle Processing Center (VPC), a high-availability manufacturing environment with both day and night shifts. This role is responsible for administering Windows servers, troubleshooting application and operational issues, assisting with system monitoring/alerting and maintenance, and some light Linux server administration. The Systems Admin
Posted 8 hours ago

Senior Linux Systems Administrator

Leidos

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Columbia, Maryland, USA

Full-time

Leidos has a new and exciting opportunity for a Senior Linux Systems Administrator 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 and immed
Posted 60+ days ago | Updated 11 hours ago

C2 Network Security Operations Center - Network Operations Center Specialist - Systems

Leidos

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Hampton, Virginia, USA

Full-time

Description The Multi-Domain Solutions Division at Leidos currently has openings for a Cyber Security Engineer / Information Systems Security Engineer (ISSE). Our team supports the Advanced Battle Management System's (ABMS) Digital Infrastructure (DI) Network Manager program. In this mission we support the Department of the Air Force (DAF) to field and operate the ABMS Digital Infrastructure, which is foundational in creating a unified command-and-control infrastructure connecting/ integrating
Posted 55 days ago | Updated 10 hours ago

IT Operations Manager

Leidos

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Bethesda, Maryland, USA

Full-time

Join Our Innovative Team at Leidos! Ready to break away from the ordinary and dive into an extraordinary career? At Leidos' High Fidelity Simulation Business Area, we're not just building systems-we're revolutionizing the future of naval simulation, training, and analysis for the US Navy. Imagine being part of a team where your work directly redefines naval capabilities. That's the Leidos experience. Position Overview We are seeking an experienced IT Operations Manager to lead and optimize the
Posted 50 days ago | Updated 11 hours ago

Senior Network Security Engineer

Leidos

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Maryland, USA

Full-time

Description Unleash Your Potential! At Leidos, we deliver innovative solutions by leveraging our diverse and talented workforce who are dedicated to our customers' success. We empower our teams, contribute to our communities, and operate sustainably. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community. Our Mission, Vision, and Values guide the way we do business. If this sounds like an environment where you can thrive, keep reading! Do
Posted 1 day ago | Updated 1 hour ago

Sr. Manager, Information Security Systems Engineer ($15,000 Sign On Bonus)

Harris Corporation

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Greenville, Texas, USA

Full-time

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers' mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris Technologie
Posted 32 days ago | Updated 11 hours ago

Junior Systems Engineer

TEKsystems c/o Allegis Group

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Fort Walton Beach, Florida, USA

Full-time

Top Skills' Details VMware platforms (vSphere, vCenter, or Horizon) Experience writing or running PowerShell, Linux shell, or Python scripts Windows Server and Linux-based systems (Ubuntu, CentOS, or RHEL) Active Directory, DNS, and basic networking concepts Must have an active Security Clearance and CompTIA Security+ Description TEKsystems is seeking a highly motivated Junior Systems Engineer with foundational experience in systems administration, virtualization, and automation tools. The engin
Posted 20 hours ago | Updated 8 hours ago

Senior Systems Administrator

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
Posted 16 days ago | Updated 22 hours ago

Senior Systems Administrator

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 Administrat
Posted 16 days ago | Updated 9 hours ago

Junior Systems Engineer (Active Secret Clearance)

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
Posted 2 days ago | Updated 8 hours ago

Systems Engineer

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
Posted 9 days ago | Updated 8 hours ago

Cyber Systems Security Engineer Senior - Eglin AFB

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
Posted 23 hours ago | Updated 11 hours ago

Sr. Systems Administrator

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
Posted 23 hours ago | Updated 11 hours ago

System Administrator

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
Posted 60+ days ago | Updated 9 hours ago

System Administrator Cross-Platform

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
Posted 19 days ago | Updated 22 hours ago