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IT System Administrator Jobs (On-site work)

120 Job Offers

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High Performance Computing System Administrator
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Seeking a High Performance Computing System Administrator in Dayton, USA. This role requires a Top Secret clearance, 8+ years of HPC experience, and expertise in Linux, workload managers (e.g., Slurm), and high-speed networking. You will provide technical leadership, ensure system availability, a...
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United States , Dayton
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105500.00 - 243000.00 USD / Year
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Hewlett Packard Enterprise
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Senior Linux System Administrator - Support Engineer
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Join our HPC support team in Canberra as a Senior Linux System Administrator. You will design, maintain, and optimize mission-critical Linux and HPC infrastructure, ensuring high availability and performance. Utilize your expertise in scripting, automation, and parallel file systems to provide ad...
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Australia , Canberra
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Not provided
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Hewlett Packard Enterprise
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Systems Administrator
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Join our team in Sparta, Michigan as a Systems Administrator. Utilize your expertise in Microsoft platforms, Active Directory, and network troubleshooting to deliver tailored client solutions. We offer competitive compensation, comprehensive benefits, and free online training in a collaborative e...
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United States , Sparta
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Robert Half
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Systems Administrator
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Join our team as a Systems Administrator in Fort Worth. Provide vital technical support for Windows systems, networks, and video conferencing platforms like Zoom and Teams. We seek a skilled professional with 3+ years of experience, excellent communication, and customer service skills. Enjoy comp...
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United States , Fort Worth
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Not provided
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Robert Half
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Federal HPC Linux System Administrator
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Join HPE as a Federal HPC Linux System Administrator in Annapolis Junction. This role requires a TS/SCI clearance and expertise in large-scale HPC, parallel file systems, and Linux (RHEL/SLES). You will provide critical technical leadership, system optimization, and customer support for mission-c...
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United States , Annapolis Junction
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119500.00 - 275000.00 USD / Year
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Hewlett Packard Enterprise
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Linux Systems Administrator
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Join our team as a Linux Systems Administrator in Roseville. Utilize your 5+ years of Linux, NFS, and virtualization (VMware/KVM) expertise to manage critical infrastructure. Automate tasks with Bash/Python/Ansible and provide excellent technical support. We offer comprehensive wellbeing benefits...
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United States , Roseville
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106000.00 - 243000.00 USD / Year
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Hewlett Packard Enterprise
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Travel Systems Administrator
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Seeking a detail-oriented Travel Systems Administrator in the San Francisco Bay Area. You will manage corporate travel logistics, administer the internal booking system, and handle expense reconciliation. The role requires 2+ years of admin experience, proficiency in MS Office, and strong organiz...
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United States , San Francisco Bay Area
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28.00 - 30.00 USD / Hour
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80Twenty
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Systems Administrator
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Join our mission-critical team in Reston, VA as a Systems Administrator. This role requires an active TS/SCI with Polygraph and expertise in VMware, scripting (PowerShell/Bash), and Active Directory. We offer competitive pay, generous benefits, and the chance to mentor junior staff in a dynamic e...
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United States , Reston
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AnaVation
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Systems Administrator
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Join ANS as a Systems Administrator in Fort Meade, MD. This role requires an active TS/SCI clearance with Polygraph and 10 years' experience managing AWS, Linux, and Windows systems. You will design, secure, and maintain critical solutions while enjoying top benefits like a 6% 401(k) match and ex...
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United States , Fort Meade, MD
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100000.00 - 165000.00 USD / Year
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Applied Network Solutions
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System Administrator
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Seeking a System Administrator with 10+ years of experience for a critical national security program in Fort Meade. This role requires an Active Full Scope Polygraph and involves supporting IT systems, troubleshooting, and managing UNIX/Windows environments. We offer a robust benefits package inc...
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United States , Fort Meade
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Aquila Technology
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Senior Linux Systems Administrator
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Seeking a Senior Linux Systems Administrator with an active Secret Clearance to support premier defense research in Lexington. This role requires 5+ years in Linux networking, scripting (Python/Ansible/Bash), and systems configuration. You will administer RHEL servers, optimize performance, and e...
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United States , Lexington
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Aquila Technology
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Systems Administrator
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Join Bluestaq in Colorado Springs as a Staff Systems Administrator. Maintain and secure critical cloud/on-premise systems, ensuring 24/7 uptime for mission-driven work. Apply your Linux admin skills and problem-solving passion in a collaborative, growth-focused environment supporting vital indust...
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United States , Colorado Springs
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78000.00 - 92500.00 USD / Year
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Bluestaq
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Senior System Administrator
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Join Centrico's innovative fintech team as a Senior System Administrator in Biella, Italy. You will manage critical network infrastructure, including F5 load balancers and Checkpoint/Fortinet firewalls, and design Cloud/Hybrid Cloud (Azure) environments. This role requires strong problem-solving ...
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Italy , Biella
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Centrico
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Senior System Administrator
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Join Centrico's innovative fintech team as a Senior System Administrator in Biella, Italy. You will manage critical network infrastructure, including F5 load balancers and Checkpoint/Fortinet firewalls, in Cloud/Hybrid environments. This role requires strong problem-solving skills, fluency in Eng...
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Italy , Biella
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Centrico
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Kubernetes Systems Administrator
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Seeking a Kubernetes Systems Administrator in Dayton to support NASIC's ATEP II program. This role requires 5+ years of Linux/Unix admin experience and involves system implementation, troubleshooting, and optimization. Desired skills include Docker, AWS, and Security+. We offer a comprehensive be...
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United States , Dayton
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Evanhoe & Associates
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Linux Systems Administrator
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Seeking a Linux Systems Administrator with an active TS/SCI clearance for an onsite role in Dayton. This position supports critical IT systems, requiring 5+ years' experience with RedHat/Linux and shift work. Enjoy robust benefits including 401(k) with immediate vesting and comprehensive medical ...
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United States , Dayton
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Evanhoe & Associates
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Senior Systems Administrator
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Seeking a Senior Systems Administrator with an active TS/SCI clearance for a role in El Segundo. Manage and secure Windows servers/workstations in a classified environment, ensuring compliance and system integrity. This role offers company-paid benefits, a 401(k) with 6% company contribution, and...
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United States , El Segundo
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120000.00 - 150000.00 USD / Year
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ExoAnalytic Solutions
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System Administrator
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Join Hemostasis LLC as a System Administrator in Saint Paul. You will configure hardware, software, and network systems, managing servers and Meraki infrastructure. We seek a proactive professional with a Master's in Computer Science and strong problem-solving skills. Enjoy full benefits includin...
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United States , Saint Paul
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Hemostasis Corp
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Windows System Administrator III
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Lead the design and lifecycle management of critical server infrastructure as a Windows System Administrator III in Savannah. This senior role requires 6+ years of expertise in Windows/Linux servers, VMware, Active Directory, and M365. You will provide technical leadership, implement high-impact ...
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United States , Savannah
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79000.00 - 112959.00 USD / Year
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Hyundai AutoEver America
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Systems Administrator
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Join JMC Aviation as a Systems Administrator in Exeter. You will play a vital role managing the Bullhorn CRM system, ensuring data integrity, and providing user support. We seek a proactive professional with strong technical, organizational, and communication skills. Enjoy benefits including a qu...
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United Kingdom , Exeter
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Not provided
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JMC Aviation
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Explore a world of opportunity in IT System Administrator jobs, the backbone of modern organizational technology. IT System Administrators are the essential professionals responsible for installing, configuring, maintaining, and securing the critical hardware and software systems that keep businesses running. This career path sits at the intersection of technical expertise and operational reliability, offering a dynamic and rewarding profession for those who enjoy problem-solving and ensuring seamless digital workflows. In a typical role, an IT System Administrator’s responsibilities are vast and vital. They manage and monitor an organization's servers, often leveraging virtualization platforms like VMware or Hyper-V, and are increasingly involved with cloud services from providers such as AWS, Microsoft Azure, or Google Cloud Platform. A core duty is maintaining network services, including Active Directory, DNS, DHCP, and email systems like Microsoft Exchange or Microsoft 365. They ensure all endpoints—employee laptops, desktops, and mobile devices—are properly configured, updated, and secure, frequently using tools like Microsoft Intune or Jamf. System Administrators also implement robust backup solutions, conduct disaster recovery tests, and apply security patches and updates to protect against vulnerabilities. They provide escalated technical support, troubleshoot complex system issues, and create detailed documentation for system configurations and procedures. The skill set for these jobs is both broad and deep. Foundational knowledge of operating systems is paramount, with expertise in Windows Server and/or Linux distributions being highly common. Understanding core networking concepts (TCP/IP, routing, firewalls) and security principles (access controls, hardening, compliance frameworks) is non-negotiable. Proficiency in scripting with PowerShell, Bash, or Python to automate repetitive tasks is a major asset that increases efficiency. Strong analytical and problem-solving skills are essential for diagnosing system failures or performance bottlenecks. Equally important are soft skills: clear communication to assist colleagues and document processes, meticulous attention to detail, and the ability to manage multiple priorities in a high-pressure environment. Typical requirements for IT System 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 valuable. Certifications such as Microsoft Certified: Azure Administrator Associate, CompTIA Server+, CompTIA Security+, Red Hat Certified System Administrator (RHCSA), or VMware Certified Professional (VCP) are frequently sought by employers. A successful candidate is typically proactive, eager to learn new technologies as the IT landscape evolves, and committed to maintaining system uptime and security. For those passionate about building stable, efficient, and secure digital infrastructures, pursuing IT System Administrator jobs offers a stable career with continuous growth and challenge. It is a role where technical skill directly translates into organizational success, making these professionals indispensable in every sector of the economy.

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