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System Administrator United States Jobs

116 Job Offers

Linux System Administrator
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Seeking an experienced **Linux System Administrator** in **Los Angeles, CA** to manage RHEL, Ubuntu, CentOS, and Debian environments. You will automate complex tasks using **Ansible, Shell, and Python**, while securing and optimizing private/public cloud instances on **AWS, Azure, and GCP**. Requ...
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United States , Los Angeles
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Not provided
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Dash Technologies
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Security System Administrator – Lead
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Lead IT Project Manager sought for a federal program-level role in Washington, DC. You will provide integrated governance across complex cybersecurity and IT initiatives, serving as the primary interface with Government stakeholders. Requires 7-10+ years of federal program management experience, ...
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United States , Washington, DC
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Not provided
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Quzara
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Linux System Administrator
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Seeking an experienced Linux System Administrator to support enterprise infrastructure in Annapolis Junction. This role requires 3+ years of RHEL/CentOS experience, expertise in IBM Enterprise Storage, Veritas NetBackup, and Nessus vulnerability management. Must hold an active Security Clearance ...
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United States , Annapolis Junction
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Not provided
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Columbia Technology Partners
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Cloud System Administrator
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Seeking a skilled Cloud System Administrator for a permanent role in Lafayette, LA. You will manage cloud systems, Active Directory, and Windows Server, ensuring security and optimal performance. Requires expertise in Amazon Cloud, Linux, Dell, and Citrix technologies. Join a growing company offe...
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United States , Lafayette
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Not provided
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Robert Half
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System Administrator 2
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Seeking an experienced **System Administrator** in **Annapolis Junction, MD** to support mission-critical enterprise IT systems. This role requires 10+ years of experience, a **DevOps** and **AWS** background, and an active **Security Clearance with Polygraph**. You will manage daily operations, ...
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United States , Annapolis Junction
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Not provided
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Columbia Technology Partners
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Journeyman Linux System Administrator
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Seeking a skilled **Journeyman Linux System Administrator** for a critical role at **Wright-Patterson AFB**. You will independently manage moderately complex Linux systems, focusing on installation, patching, monitoring, and troubleshooting to ensure high reliability and security. Requires 2-6 ye...
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USA , Wright-Patterson AFB
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Not provided
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Columbia Technology Partners
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System Administrator
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Seeking a **System Administrator** in **Central Maryland** to join an **MFA Help Desk** team managing RSA, SIPR, and NIPR tokens. Requires 3+ years of experience, a relevant Bachelor’s degree (or 7 years total), and an **active Security Clearance with Polygraph**. Responsibilities include Tier 1/...
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United States , Central Maryland
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Salary
96000.00 - 135000.00 USD / Year
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RealmOne
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System Administrator 1
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Seeking a **System Administrator 1** in Central Maryland to manage IT infrastructure, including UNIX, Linux, and Windows systems. This role requires Tier 1/2 support, ITSM experience, and ServiceNow proficiency. Candidates need a Bachelor’s degree (or equivalent experience), IAT Level II certific...
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United States , Central Maryland
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125000.00 - 175000.00 USD / Year
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RealmOne
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System Administrator II
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Seeking a **System Administrator II** in **Rapid City** to install, configure, and troubleshoot Windows systems. Requires an active **Top-Secret Clearance** with SCI eligibility, **CompTIA Security+ CE**, and 2-4 years of IT experience. Key duties include help desk support, server administration,...
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United States , Rapid City
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86000.00 - 90000.00 USD / Year
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Amentum
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System Administrator
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Seeking a skilled **System Administrator** for an on-site role in **West Bend, Wisconsin**. You will manage **Microsoft Entra ID (Azure AD)**, **Active Directory**, and **Windows 11** endpoints using **Intune**. Key duties include network monitoring with **Pulseway**, endpoint security via **Crow...
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United States , West Bend
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Robert Half
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System Administrator Level 3
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Seeking an experienced Level 3 System Administrator in Annapolis Junction. This role requires 15 years of SA experience, DoD 8570 IAT compliance, and deep Linux/STE expertise for IT infrastructure support. Enjoy top-tier benefits including fully paid medical/dental/vision and a 6% 401k match. U.S...
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United States , Annapolis Junction
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Columbia Technology Partners
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System Administrator
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Seeking a Systems Administrator in Colorado Springs to oversee system lifecycle development in secure DoD environments. This role requires a TS/SCI clearance, Security+ certification, and experience with DevSecOps, requirements tracing, and V&V testing. You will lead hardware/software integration...
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United States , Colorado Springs
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75094.23 - 137446.63 USD / Year
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Arcfield
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High Performance Compute Linux System Administrator
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Seeking a High Performance Compute Linux System Administrator with an active Top Secret clearance in Vicksburg. This on-site role requires 5+ years of Linux admin experience, HPC expertise, and relevant certifications. You will ensure system health, security, and SLAs for critical client infrastr...
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United States , Vicksburg
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105500.00 - 243000.00 USD / Year
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Hewlett Packard Enterprise
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OCI System Administrator
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Seeking an experienced OCI System Administrator in Atlanta to manage Oracle Linux servers and Oracle Cloud Infrastructure environments. This role requires 10+ years of systems administration expertise, including OCI networking, storage, and security services like Data Safe. We offer a competitive...
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United States , Atlanta
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75168.00 - 156600.00 USD / Year
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NTT DATA
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System Administrator
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Join Aquila Technology as a System Administrator supporting premier defense research in Lexington. Maintain a heterogeneous network (Linux, Windows, VMware) and support DevSecOps with Ansible automation. Must be a US Citizen eligible for Secret Clearance with strong scripting and problem-solving ...
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United States , Lexington
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Aquila Technology
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Maximo System Administrator
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Join our team in Philadelphia as a Maximo System Administrator. You will administer and enhance Maximo 7.5+ and Oracle systems, ensuring optimal performance and user support. This role requires 7+ years of Maximo and Windows Server experience plus Security+ certification. We offer comprehensive b...
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United States , Philadelphia
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Not provided
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Robert Half
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Solaris System Administrator
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Seeking an experienced Solaris System Administrator to manage Oracle Solaris environments and support OCI integration. You will handle system administration, performance tuning, and high availability for enterprise systems. The role requires strong skills in Solaris, ZFS, Zones, and shell scripti...
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United States
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Abotts
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System Administrator
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Seeking a System Administrator to support USAF Test Operations at Arnold AFB, TN. Deploy and manage Windows/Linux servers, VMware, and enterprise tools like SCCM. Requires a relevant degree, 5-10 years' experience, and ability to obtain security clearance. We offer competitive pay, benefits, and ...
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United States , Arnold AFB
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84000.00 - 145000.00 USD / Year
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Astrion
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Core Infrastructure System Administrator
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Seeking a Core Infrastructure System Administrator in Fremont to manage enterprise systems and security technologies. You'll maintain Windows/Linux servers, ensure security, and support access control systems. Requires 5+ years of sys admin experience and PACS knowledge. We offer full benefits, P...
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United States , Fremont
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114640.00 - 171960.00 USD / Year
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M.C. Dean, Inc
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Security Systems System Administrator 2
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Join our global tech team as a Security Systems Administrator in Fremont. You will maintain and test critical Physical Access Control, CCTV, and PSIM systems. The role requires experience with system triage, Windows patching, and networking. We offer comprehensive benefits including medical insur...
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United States , Fremont
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99680.00 - 149520.00 USD / Year
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M.C. Dean, Inc
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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.