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System Administrator United States Jobs (On-site work)

64 Job Offers

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Linux System Administrator
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Join Boeing as a Linux System Administrator in Seal Beach, CA, supporting critical proprietary programs. You will manage RHEL and AWS environments, ensuring security compliance with JSIG and RMF. Requires an active TS/SCI clearance and Linux experience. Enjoy top benefits, including 401(k) match,...
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United States , Seal Beach
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79050.00 - 133400.00 USD / Year
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Boeing
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Linux System Administrator
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United States , Annapolis Junction
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90000.00 - 140000.00 USD / Year
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Columbia Technology Partners
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System Administrator 2
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United States , Annapolis Junction
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125000.00 - 150000.00 USD / Year
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Columbia Technology Partners
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System Administrator 1
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United States , Annapolis Junction
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105000.00 - 125000.00 USD / Year
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Columbia Technology Partners
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High Performance Computing System Administrator
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United States , Aberdeen
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105500.00 - 243000.00 USD / Year
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Hewlett Packard Enterprise
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System Administrator Junior Level
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Seeking a **Junior-Level System Administrator** with a TS/SCI polygraph for a critical role in Laurel, MD. You will provide enterprise infrastructure support, creating network designs and documentation for complex systems. Requires 5+ years of SA experience, DoD 8570 IAM Level I, and expertise in...
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United States , Laurel
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110000.00 - 145000.00 USD / Year
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Integrity Technology Consultants
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Cloud System Administrator
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Senior Cloud System Administrator needed in Springfield, VA to support mission-critical intelligence projects. Requires TS/SCI with Polygraph, cloud certification (AWS/OCI/Google), and 5+ years experience. You will deploy, troubleshoot, and maintain cloud systems for the GEODS contract. Enjoy top...
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United States , Springfield
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150000.00 - 180000.00 USD / Year
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Amentum
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System Administrator
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2HB Incorporated seeks a System Administrator for a government role in Annapolis Junction, MD. You will manage ALL LINUX environments, containers/cloud, storage, virtualization, and IP networking. Expertise in PKI/TLS/crypto and SSP compliance is required. This full-time position offers a chance ...
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United States , Annapolis Junction
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Not provided
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2HB
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System Administrator
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2HB Incorporated seeks a System Administrator in Annapolis Junction, MD, to support a government customer. This role requires a TS/SCI/Full Scope Polygraph and expertise in Linux, containerization, KVM virtualization, and Ansible/SALT automation. You will manage storage, FreeIPA, scripting (Bash,...
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United States , Annapolis Junction
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2HB
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System Administrator 1
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United States , Sacramento
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83120.00 - 124680.00 USD / Year
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M.C. Dean, Inc
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System Administrator
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United States , Annapolis Junction
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2HB
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System Administrator - Mid-Level
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Mid-Level System Administrator needed at Eglin AFB, FL to support the 96th Cyberspace Test Group. Requires a STEM Bachelor’s degree, 3-10 years’ experience, and an active DoD SECRET clearance. Key duties include Windows/Linux system administration, RMF/STIG compliance, and PowerShell scripting. B...
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United States , Eglin Air Force Base
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Astrion
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System Administrator 2
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Seeking a Senior System Administrator in Annapolis Junction, MD to ensure IT system reliability across Linux, Windows, and AWS cloud environments. This role requires 10+ years of experience, Kubernetes, Terraform, and Ansible skills, plus an active Security Clearance and DOD 8570 certification. Y...
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USA , Annapolis Junction
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120000.00 - 175000.00 USD / Year
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Columbia Technology Partners
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Physical Security System Administrator 1
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Join our Security and Electronic Systems team as a Physical Security System Administrator 1 in San Jose. You’ll troubleshoot and support access control, video surveillance, and key management systems (CCURE, Lenel, Genetec) for federal and commercial clients. Requires 1+ years of enterprise physi...
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United States , San Jose
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83120.00 - 124680.00 USD / Year
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M.C. Dean, Inc
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It Senior System Administrator
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Seeking an experienced **IT Senior System Administrator** in Newkirk, OK to ensure the integrity and availability of critical casino systems. This role requires 6+ years of experience in systems administration, expertise in VMware, Active Directory, and security monitoring. You will manage server...
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United States , Newkirk
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7 Clans Casinos
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Microsoft Architect & System Administrator
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Seeking a Microsoft Architect & System Administrator for a Digital Modernization team in Washington, DC. You will engineer and administer enterprise Microsoft environments, including Active Directory, Entra ID, SCCM, and Intune. Requires a Bachelor’s degree, U.S. Citizenship, and expert-level Pow...
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United States , Washington
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Robert Half
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Microsoft Architect & System Administrator
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Seeking a Microsoft Architect & System Administrator for a Digital Modernization team in Washington, DC. You will engineer, integrate, and secure enterprise Microsoft environments (Active Directory, Entra ID, SCCM/Intune) across on-prem and cloud. Requires a Bachelor’s degree, U.S. Citizenship, a...
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United States , Washington
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Robert Half
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Junior Microsoft System Administrator
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Join INSCOM as a Junior Microsoft System Administrator in Arlington, VA. Support global intelligence missions by managing Windows Server, Active Directory, and desktop environments. Requires 3+ years of experience with Windows 10/11, Office 365, and imaging. Enjoy comprehensive benefits including...
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United States , Arlington
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125000.00 - 130000.00 USD / Year
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Amentum
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System Administrator
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Seeking an experienced **System Administrator** for a critical role at Ft. Gordon, supporting Tier 1 & 2 IT operations. You will manage UNIX/Windows systems, network devices, and infrastructure while providing troubleshooting and problem resolution. Requires 5-15+ years of SA experience, a techni...
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United States , Ft. Gordon
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RealmOne
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System Administrator
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We are seeking a skilled System Administrator to manage Linux systems and Kubernetes clusters in Fairborn, OH. You will leverage Docker, Helm, and cloud-based environments to ensure high availability and seamless CI/CD workflows. Ideal candidates possess strong networking, security, and monitorin...
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United States , Fairborn
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Altamira Technologies
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About the System Administrator role

Explore a world of opportunity in system administrator jobs, the backbone of modern IT infrastructure. System administrators are the essential technicians who ensure an organization's computer systems—from servers and networks to software and security—run reliably, securely, and efficiently. This critical profession sits at the intersection of technology and operations, demanding a blend of deep technical expertise, proactive problem-solving, and clear communication. Professionals in this field are responsible for the day-to-day health of IT environments, making them indispensable in virtually every industry, from finance and healthcare to education and government.

The core responsibilities of a system administrator are vast and varied, typically encompassing system installation, configuration, and maintenance. This includes setting up hardware and software, managing user accounts and access permissions, and performing regular system updates and patches. A significant portion of the role involves monitoring system performance and network activity to preempt issues and ensure optimal uptime. System administrators are also the first line of defense for cybersecurity, implementing firewalls, intrusion detection systems, and backup/disaster recovery plans to protect sensitive data. Furthermore, they provide crucial technical support to colleagues, diagnosing and resolving hardware, software, and network problems to minimize disruption. Automating repetitive tasks through scripting is a common practice to enhance efficiency and consistency across the IT landscape.

To thrive in system administrator jobs, individuals must possess a strong foundational skill set. Proficiency in operating systems is paramount, with deep knowledge of environments like Linux (e.g., Red Hat, Ubuntu) and/or Microsoft Windows Server being highly common. Understanding networking fundamentals—such as TCP/IP, DNS, DHCP, and VPNs—is non-negotiable. Experience with virtualization platforms like VMware or Hyper-V, along with cloud services from providers such as AWS, Azure, or Google Cloud, is increasingly essential. Scripting skills in Bash, PowerShell, or Python are highly valued for automation. Beyond technical prowess, successful system administrators exhibit excellent analytical and problem-solving abilities, meticulous attention to detail, and the capacity to manage multiple priorities in a high-pressure environment. Strong written and verbal communication skills are critical for documenting procedures, creating user guides, and explaining complex technical concepts to non-technical stakeholders.

Typical requirements for these roles often include a bachelor’s degree in computer science, information technology, or a related field, although substantial relevant experience can sometimes substitute for formal education. Professional certifications, such as CompTIA Security+, Linux+, Microsoft Certified: Azure Administrator, or Red Hat Certified System Administrator (RHCSA), are frequently sought by employers and can significantly enhance a candidate's profile. A commitment to continuous learning is vital due to the rapid evolution of technology. For those with a passion for building, maintaining, and securing the digital frameworks that power businesses, system administrator jobs offer a challenging, stable, and rewarding career path with endless avenues for specialization and advancement.