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System Administrator Jobs (On-site work)

92 Job Offers

New
System Administrator
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Romania , Bucharest
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JUJUR
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New
System Administrator
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United States , Eglin Air Force Base
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Astrion
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New
Linux System Administrator
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United States , Chantilly
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Altamira Technologies
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New
System Administrator
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Seeking a skilled **System Administrator** in **Taufkirchen, Germany** to manage modern IT systems, provide L1 & L2 support, and drive infrastructure development. You will handle troubleshooting, monitoring, user management, and asset tracking. Requires a Master’s/Diploma in Computer Science, flu...
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Germany , Taufkirchen
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Sopra Steria
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System Administrator - Level 2
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Canada , Ottawa
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Randstad
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Microsoft Architect & System Administrator
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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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United States , Washington
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Robert Half
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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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Columbia Technology Partners
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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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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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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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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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Senior System Administrator
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Senior System Administrator needed in Annapolis Junction, MD to support a government customer. Requires 15+ years of experience, expertise in Windows Server, Active Directory, Linux, and Broadcom VMware/ESXi. Key duties include system hardening, security compliance (Nessus/ACAS), and RMF. Must ho...
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United States , Annapolis Junction
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2HB
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Sr. System Administrator (Data Centers)
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Join our team as a Senior System Administrator for Data Centers in Vancouver. You will own our global hardware and cloud infrastructure, focusing on reliability, scalability, and automation. This senior role requires 5+ years of Linux, data center deployment, and hybrid cloud expertise. We offer ...
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Canada , Vancouver
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118500.00 - 150000.00 CAD / Year
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Dialpad
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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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System Administrator
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Join Vention in Vilnius as a System Administrator, providing first-line IT support across Windows, Linux, and MacOS environments. You will handle software, hardware, and network issues, manage antivirus clients, and oversee equipment procurement. Enjoy a collaborative community, AI tool licenses,...
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Lithuania , Vilnius
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1500.00 - 2500.00 EUR / Month
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Vention
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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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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.