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IT System and Administrator Jobs (On-site work)

195 Job Offers

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Journeyman Linux System Administrator
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USA , Wright-Patterson AFB
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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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Columbia Technology Partners
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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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Systems Administrator
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United States , Elizabethtown
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Robert Half
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Systems Administrator
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United States , Houston
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Robert Half
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Systems Administrator
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United States , Galveston
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Robert Half
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Senior Systems Administrator (Linux)
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United States , Waimea
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105000.00 - 145000.00 USD / Year
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Amentum
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Farm System and Data Administrator
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Join a leading agri-food business as a Farm System and Data Administrator in Hessle. This key support role demands strong administrative skills, advanced Excel expertise, and a keen eye for data accuracy. You will maintain operational data, support reporting, and help streamline processes. Enjoy ...
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United Kingdom , Hessle
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Crown Chicken LTD, Division of Cranswick PLC
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IT Administrator Shopfloor/Production Systems
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Join Brose Group as an IT Administrator for Shopfloor/Production Systems in Ostrava. You will ensure a stable, high-performance application environment, handling updates and incident management. The role requires IT administration experience, knowledge of databases, networks, and OS, plus strong ...
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Czech Republic , Ostrava
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Brose Fahrzeugteile
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RHEL Systems Administrator
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Join TapHere! Technology as a RHEL Systems Administrator, supporting Cameo systems in Fort Washington or Warrenton. You will ensure high availability, manage virtual desktop environments, and optimize server resources. This role requires 5+ years of RHEL administration and expertise in command-li...
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United States , Fort Washington; Warrenton
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TapHere! Technology
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Systems Administrator
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Join our team in Greenwell Springs, LA, as an onsite Systems Administrator. You will manage network, server, and PC environments, ensuring secure and seamless operations. The role requires 5+ years' experience with Windows Server, Active Directory, and network security. We offer comprehensive ben...
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United States , Greenwell Springs
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Robert Half
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Systems Administrator
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Seeking a Systems Administrator in Mountain View to support NASA's ASSESS Contract. Manage diverse IT infrastructure, including Linux/Windows servers, cloud systems, and cybersecurity compliance. Requires 5 years' experience, a STEM degree, and skills in scripting, AI/ML, and tools like Splunk. W...
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United States , Mountain View
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Astrion
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Systems Administrator
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Join our team in Santa Monica as a Systems Administrator, specializing in Apple ecosystem management. You will leverage your expertise in JAMF Pro, JAMF School, and scripting to support a large-scale environment of 1,000+ devices. This full-time, onsite role offers a comprehensive benefits packag...
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United States , Santa Monica
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Robert Half
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Systems Administrator / Engineer II
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Seeking a Systems Administrator/Engineer II in Indianapolis to support mission-critical DoD IT infrastructure. This role requires an active Secret Clearance and involves system integration, performance optimization, and troubleshooting. Expect 10-25% travel between local training centers to maint...
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United States , Indianapolis
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Barbaricum
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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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Systems Administrator
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Join our team as a Systems Administrator in Newburyport, MA. This onsite role involves supporting IT operations, servers, Microsoft 365, and network infrastructure. Ideal candidates have expertise in Active Directory, VMware, and PowerShell scripting. We offer comprehensive benefits including med...
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United States , Newburyport
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Robert Half
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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 IT System and Administrator role

Explore a world of opportunity in IT System and Administrator jobs, a critical profession that forms the backbone of modern organizational technology. Professionals in this field are responsible for the installation, configuration, maintenance, and security of an organization's computer systems and networks. Their core mission is to ensure that IT infrastructure—from servers and storage to cloud services and user workstations—remains reliable, efficient, and secure, enabling all other business functions to operate smoothly.

A career in system administration typically involves a diverse set of responsibilities. System Administrators manage core services like user accounts, email systems, and directory services (e.g., Active Directory). They oversee server environments, which may include physical hardware, virtualized platforms (like VMware), and cloud resources (such as AWS or Azure). Daily tasks often encompass monitoring system performance, applying software updates and security patches, managing backups and disaster recovery plans, and troubleshooting hardware and software issues. They also enforce IT security policies, configure firewalls, and implement access controls to protect sensitive data from breaches. Furthermore, creating and maintaining detailed technical documentation for procedures and system configurations is a standard part of the role.

The skill set required for these jobs is both broad and deep. Strong foundational knowledge of operating systems—particularly Windows Server and Linux distributions—is essential. Proficiency in networking concepts (TCP/IP, DNS, DHCP) and experience with scripting languages like PowerShell, Bash, or Python for automation are highly valued. Familiarity with cloud platforms, virtualization technologies, and containerization (e.g., Docker) is increasingly important. Beyond technical prowess, successful System Administrators possess excellent problem-solving and analytical abilities to diagnose and resolve complex issues. They must have clear communication skills to interact with colleagues, provide user support, and explain technical concepts to non-technical stakeholders. A methodical approach, attention to detail, and a commitment to following IT security best practices and compliance frameworks are paramount.

Typical requirements for IT System and Administrator jobs often include a bachelor’s degree in computer science, information technology, or a related field, though relevant experience and professional certifications can be equally persuasive. Certifications such as Microsoft Certified: Azure Administrator, CompTIA Security+, Network+, Linux+, or those from VMware and AWS are common and demonstrate specialized expertise. The role suits individuals who are proactive, eager to continuously learn in a fast-evolving field, and capable of working both independently and as part of a collaborative IT team. If you are passionate about building stable, secure, and scalable technological environments, exploring system administrator jobs could be your pathway to a rewarding and indispensable career.

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