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System Administrator United States Jobs (On-site work)

71 Job Offers

Senior Technical Analyst & System Administrator - Wealth Management
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93000.00 - 109000.00 USD / Year
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Commerce Bank
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System Administrator 2
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132000.00 - 178000.00 USD / Year
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RealmOne
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System Administrator Lead
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190000.00 - 240000.00 USD / Year
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RealmOne
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System Administrator 3
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United States, Central Maryland
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208000.00 - 238000.00 USD / Year
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RealmOne
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Senior Windows System Administrator
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Senior Windows System Administrator needed in Johns Creek, GA to manage, secure, and optimize enterprise Microsoft infrastructure. Requires 7+ years of experience with Windows Server, Active Directory, Microsoft 365, and VMware/Hyper-V. Key skills include PowerShell automation, cloud integration ...
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Tier4 Group
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System Administrator 3
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Columbia Technology Partners seeks a System Administrator 3 to maintain and optimize mission-critical IT systems in Annapolis Junction. This role requires 10+ years of experience with Linux, HPC environments, and automation tools like Ansible. You will lead advanced troubleshooting, manage high-s...
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United States, Annapolis Junction
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160000.00 - 190000.00 USD / Year
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Columbia Technology Partners
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System Administrator 3
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Columbia Technology Partners seeks a System Administrator 3 to support mission-critical IT systems in Bluffdale, UT. This role requires 10+ years of experience, a DOD 8570 IAT Level II certification, and an active security clearance with polygraph. You will manage Linux and HPC environments, leve...
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140000.00 - 160000.00 USD / Year
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Columbia Technology Partners
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System Administrator 2
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Columbia Technology Partners seeks a System Administrator 2 to support enterprise IT systems and mission operations sustainment in Bluffdale, UT. Requires 5+ years of Linux admin experience, IAT Level II certification, and U.S. Citizenship. Key skills include RHEL, Ansible, Nagios, and scripting....
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110000.00 - 130000.00 USD / Year
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Columbia Technology Partners
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Linux System Administrator
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Seeking a skilled **Linux System Administrator** for a critical **Cross Domain Solution (CDS)** in **Chantilly, VA**. You will manage **Red Hat Linux 7/8/9**, automate tasks with **Ansible** and **Python/Bash**, and maintain **Git** version control. Requires **TS/SCI with CI Poly** and expertise ...
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150000.00 - 215000.00 USD / Year
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Altamira Technologies
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System Administrator - Senior
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Senior System Administrator needed at Eglin AFB to support the 96th Cyberspace Test Group. Manage Windows 11, Active Directory, and M365 for 500+ users in a mission-critical environment. Requires 10+ years IT experience, Secret clearance (Top Secret eligible), and U.S. Citizenship. Enjoy competit...
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Astrion
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Linux System Administrator
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120000.00 - 160000.00 USD / Year
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Altamira Technologies
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System Administrator 3
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United States, Annapolis Junction
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165000.00 - 190000.00 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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130000.00 - 155000.00 USD / Year
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Columbia Technology Partners
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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 Linux administration, Proxmox virtualization, and Ansible/SALT automation. Expertise in scripting (Bash, Python) and SSP compliance is required. This full-time position offers a chance t...
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United States, Annapolis Junction
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2HB
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System Administrator 1
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Join our Security and Electronic Systems team as a System Administrator 1 in Sacramento, CA. You’ll provide IT support, triage help desk calls, and monitor enterprise systems for federal and commercial clients. Requires Security+ certification, Windows patching skills, and basic networking knowle...
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83120.00 - 124680.00 USD / Year
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M.C. Dean, Inc
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High Performance Computing System Administrator
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Seeking an experienced **High Performance Computing System Administrator** in **Aberdeen, MD** to provide technical leadership and support for HPC systems. Requires 8+ years of experience, **CompTIA Security+** and **Linux+** certifications, and a **TS Clearance**. Key duties include system healt...
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105500.00 - 243000.00 USD / Year
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Hewlett Packard Enterprise
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System Administrator 1
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Columbia Technology Partners seeks a System Administrator 1 for Linux-based IT systems in Annapolis Junction. You will perform system monitoring, troubleshooting, and mission sustainment using tools like Ansible, Nagios, and Bash. Requires 3+ years of experience, a Bachelor’s degree, and an activ...
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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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System Administrator 2
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Columbia Technology Partners seeks a System Administrator 2 to support mission-critical Linux infrastructure in Annapolis Junction. This role requires an active Security Clearance with Polygraph, DOD 8570 IAT Level II certification, and 5+ years of experience. You will manage system stability, pe...
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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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Linux System Administrator
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Columbia Technology Partners seeks a skilled Linux System Administrator for enterprise infrastructure in Annapolis Junction. You will manage RHEL/CentOS systems, IBM storage, and Veritas NetBackup, performing patching, hardening, and vulnerability remediation with Nessus. Ideal candidates have 3+...
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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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Cloud System Administrator Mid Level
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United States, Annapolis Junction
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145000.00 - 195000.00 USD / Year
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Integrity Technology Consultants
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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.