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System Administrator United States Jobs

116 Job Offers

Senior Windows System Administrator
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Seeking a Senior Windows System Administrator in Los Altos for a hands-on role managing a complex hybrid environment. You will own VDI (VMware Horizon), advanced Active Directory/Group Policy, and PowerShell automation. This position requires translating instructional needs into technical solutio...
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United States , Los Altos
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Not provided
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Robert Half
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Senior System Administrator
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Join 2HB Incorporated as a Senior System Administrator in Annapolis Junction, MD. This role requires expertise in Windows/Linux Server, VMware/ESXi, and NetApp storage, with an Active DoD IAT Level II cert. You will ensure system security, perform troubleshooting, and manage network resources. Id...
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United States , Annapolis Junction
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2HB
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System Administrator 2
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Seeking an experienced System Administrator to support IT infrastructure in Central Maryland. This role requires 10 years of SA experience, expertise in UNIX/Windows systems, and active problem resolution for client/server/networks. Must hold an active Security Clearance with Polygraph. We offer ...
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United States , Central Maryland
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150000.00 - 180000.00 USD / Year
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RealmOne
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Senior System Administrator / System Engineer - Linux
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Seeking a Senior Linux System Administrator/Engineer for a mission-critical Intelligence Community role in Annapolis Junction. Requires 10+ years' expertise with RHEL/CentOS, VMware, JBoss/WildFly, Ansible, and scripting. Active Security Clearance with Polygraph and Security+ certification are ma...
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United States , Annapolis Junction
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Columbia Technology Partners
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Senior System Administrator / System Engineer - Linux
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Seeking a Senior Linux System Administrator/Engineer for a mission-critical Intelligence Community role in Annapolis Junction. This position requires 10+ years of Linux expertise (CentOS/RHEL), VMware, Ansible, and an active Security Clearance. Enjoy top-tier benefits including a 6% 401k match, c...
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United States , Annapolis Junction
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Columbia Technology Partners
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System Administrator Senior
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Seeking a Senior System Administrator to support HPC and data analytics for a critical research lab. This role requires extensive Linux/Windows expertise, TS/SCI clearance with polygraph, and 8+ years of lead experience. You will design, maintain, and optimize cutting-edge systems in a mission-fo...
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United States , Catonsville
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77600.00 - 176000.00 USD / Year
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Booz Allen Hamilton
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System Administrator
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Seeking a Linux System Administrator in Columbia, MD to design and maintain Cross Domain Solutions for critical DoD cybersecurity missions. Requires 3+ years with RHEL/CentOS, VMware, Git, and an active TS/SCI with polygraph. You'll enhance enterprise security and performance while receiving comp...
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United States , Columbia
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77600.00 - 176000.00 USD / Year
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Booz Allen Hamilton
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System Administrator
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United States , Columbus
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Not provided
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Robert Half
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System Administrator
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Seeking a TS/SCI cleared System Administrator in Annapolis Junction, MD. This role requires deep Linux expertise, including PKI/TLS, virtualization, and cloud/container environments. You will provide critical application support, troubleshooting, and SSP compliance on secure systems. Experience w...
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United States , Annapolis Junction
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2HB
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System Administrator 2
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Seeking a Level 2 System Administrator in Annapolis Junction to provide Tier 1/2 support for critical IT infrastructure. This role requires 10 years of experience, a security clearance, and expertise in Windows/UNIX, networks, and database environments. Enjoy top-tier benefits including fully pai...
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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 an experienced System Administrator in Richardson, TX. You will manage enterprise Microsoft technologies, including Active Directory, Office 365, and virtualization. The role requires strong PowerShell skills and expertise in cloud platforms (Azure/AWS). Drive continuous improvement in a ...
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United States , Richardson
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Not provided
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Associa
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IT System Administrator
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United States , New York City
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150000.00 - 185000.00 USD / Year
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Legora
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EPM Financial System Administrator
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United States , New York
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95000.00 - 115000.00 USD / Year
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Hunter Douglas
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System Administrator
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United States , Washington, DC
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Not provided
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Robert Half
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Senior Linux System Administrator
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Join Synergy ECP as a Senior Linux System Administrator in Annapolis Junction. This role requires 15 years of SA experience, expertise in Linux, Ansible, Kubernetes, and HCI solutions. A TS/SCI with Polygraph clearance is mandatory. We offer competitive pay, comprehensive benefits, flexible work,...
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United States , Annapolis Junction
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190000.00 - 220000.00 USD / Year
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Synergy ECP
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Lead System Administrator
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Lead Systems Administrator role in NYC. Act as the technical escalation point, owning reliability and security for core IT services like Google Workspace, Okta, and Slack. Ideal candidates have SaaS platform expertise, cloud/AWS knowledge, and scripting skills in Bash/Python. Enjoy competitive co...
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United States , New York City
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113700.00 - 148600.00 USD / Year
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Braze
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Lead System Administrator
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United States , Chicago
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108700.00 - 127900.00 USD / Year
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Braze
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Lead System Administrator
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United States , Austin
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103800.00 - 122100.00 USD / Year
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Braze
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System Administrator, CRM
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United States , Spokane
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31.24 - 39.03 USD / Hour
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Gonzaga University
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Servicenow System Administrator and Team Supervisor
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United States , Cordova
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Not provided
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West Fraser
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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.