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Systems Administrator United States Jobs (On-site work)

159 Job Offers

Labs Systems Administrator
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Seeking a **Labs Systems Administrator** in Ridgecrest, CA to support F/A-18 & EA-18G programs. Requires a Secret Clearance, U.S. Citizenship, and 5+ years of experience with Windows Server and DoD computing. You will install, troubleshoot, and secure networked systems while providing front-facin...
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United States , Ridgecrest
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Salary
70310.00 - 90000.00 USD / Year
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DCS Corporation
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Systems Administrator
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Seeking an experienced Systems Administrator for a long-term contract supporting a university environment in New Concord, Ohio. You will ensure reliable infrastructure across network, server, desktop, and voice systems. Requires 5+ years of experience with Active Directory, Windows Server, Dell h...
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United States , New Concord
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Not provided
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Robert Half
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Systems Administrator
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We are seeking a Systems Administrator to provide Yardi support for property management teams in Orange, CA. This role combines technical troubleshooting with a strong service mindset, requiring experience in multifamily environments and hands-on Yardi familiarity. You will diagnose system issues...
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United States , Orange
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Not provided
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Robert Half
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Contract Systems Administrator
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Seeking a skilled Contract Systems Administrator in Nashville for a reputable company. You will manage Windows Server, Linux, and network infrastructure, ensuring security and stability. Ideal candidates have proven system admin experience, troubleshooting skills, and relevant certifications. Enj...
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United States , Nashville
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Not provided
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Robert Half
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Systems Administrator
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We are seeking a proactive Systems Administrator to optimize and secure our IT infrastructure in St. Louis, MO. You will manage servers, cloud platforms, and user access while ensuring system reliability and performance. Ideal candidates bring expertise in Windows/Linux, networking, and virtualiz...
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United States , Saint Louis
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Robert Half
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Systems Administrator
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We are seeking a Systems Administrator with strong Microsoft Azure experience to manage hybrid cloud and on-premises infrastructure. This role focuses on administering Azure IaaS/PaaS, Windows Server, Active Directory, and networking while driving security, performance, and cloud migrations. Idea...
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Location
United States , Merrimack
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Robert Half
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Systems Administrator
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We are seeking a Systems Administrator to manage Microsoft 365 and Exchange Online in Brentwood, TN. You will provide Tier 2/3 support, administer mail flow, and automate tasks using PowerShell. Ideal candidates have 2+ years of enterprise M365 experience and Active Directory knowledge. Enjoy med...
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United States , Brentwood
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Robert Half
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Systems Administrator
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Apollo Mechanical seeks a skilled Systems Administrator in Denver to ensure server stability, security, and scalability. You will manage Windows Server 2016-2022, Hyper-V, Active Directory, and SAN storage. Key requirements include 3+ years of experience with SQL Server maintenance, Veeam backups...
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Location
United States , Denver
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Not provided
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Apollo Mechanical Contractors
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Lead Systems Administrator
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Lead Systems Administrator needed in Colorado Springs to lead IT infrastructure and a team of system administrators for a USSF customer. Requires a TS/SCI clearance, 5+ years of systems admin experience, and expertise in Windows Server, Linux/Unix, and virtualization. This leadership role offers ...
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United States , Colorado Springs
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Salary
96534.61 - 167854.95 USD / Year
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Arcfield
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Systems Administrator 2
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Amentum seeks a Systems Administrator 2 in Annapolis Junction, MD, to provide Tier 1/2 support for PKI tools. Requires a TS/SCI Poly, 10+ years of SA experience, and DoD 8570 IAT Level II certification. You will troubleshoot Windows/Linux issues, test new releases, and update SOPs. Benefits inclu...
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United States , Annapolis Junction
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Amentum
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Principal Systems Administrator
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Principal Systems Administrator needed onsite in Annapolis Junction, MD. Leverage 15+ years of systems administration expertise to support critical Intelligence Community missions. Manage IT systems, resolve Tier 1/2 issues, and optimize enterprise operations. Requires active TS/SCI with Full Sco...
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United States , Annapolis Junction
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Salary
175000.00 - 205000.00 USD / Year
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Riverstone Enterprise Solutions
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Dayforce HCM Systems Administrator
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Seeking an experienced **Dayforce HCM Systems Administrator** for a contract-to-hire role in **Des Moines, Iowa**. You will optimize enterprise HR/payroll systems, resolve complex integrations, and ensure data integrity. Requires 5+ years in HCM/ERP administration with hands-on **Dayforce** exper...
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United States , Des Moines
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Robert Half
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Senior Systems Administrator
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Senior Systems Administrator needed in Jacksonville to optimize enterprise infrastructure across on-prem and hybrid cloud environments. Requires 7+ years of Windows Server, Active Directory, and VMware expertise, plus Azure and PowerShell skills. Lead modernization, patching, disaster recovery, a...
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United States , Jacksonville
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Robert Half
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Systems Administrator
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We are seeking an experienced Systems Administrator for a high-volume, multi-site IT environment in White Bear Lake, MN. This hands-on role requires expertise in Windows Active Directory, Microsoft Entra ID, VMware, and PowerShell scripting. You will enhance system reliability, security, and auto...
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United States , White Bear Lake
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Robert Half
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Systems Administrator
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Seeking a **Systems Administrator** in **Aurora, CO** to provide Tier 2 support for mission-critical systems. Requires an active **TS/SCI with polygraph**, **Security+ CE**, and **UNIX/Linux** administration experience. You will maintain high availability across Solaris, Linux, and Windows, troub...
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United States , Aurora
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Salary
100000.00 - 200000.00 USD / Year
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Applied Network Solutions
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Systems Administrator
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Seeking a Systems Administrator for a contract-to-permanent role in Omaha, NE. You will manage enterprise server and network infrastructure, focusing on Active Directory, Microsoft 365, and Windows Server. Ideal candidates have 2+ years of experience with backup technologies, DNS, and security mo...
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United States , Omaha
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Not provided
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Robert Half
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Systems Administrator
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United States , White Bear Lake
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Robert Half
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GIS Systems Administrator
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Seeking an experienced **GIS Systems Administrator** for upcoming contract roles in **Charlotte, NC**. You will support enterprise **ESRI** environments, including **ArcGIS Enterprise**, **ArcGIS Online**, and **Cityworks**. Key requirements include expertise in **SQL**, **Python**, **PowerShell*...
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United States , Charlotte
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Not provided
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Robert Half
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Systems Administrator
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United States , Red Oak
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Robert Half
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Principal Systems Administrator
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Principal Systems Administrator needed onsite in Aurora, CO for Riverstone Enterprise Solutions. This role requires 15+ years of experience, a TS/SCI with Full Scope Polygraph, and expertise in IT system implementation, troubleshooting, and Tier 1/2 support. Join a zero-bureaucracy environment su...
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Location
United States , Aurora
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Salary
175000.00 - 205000.00 USD / Year
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Riverstone Enterprise Solutions
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About the Systems Administrator role

Explore a world of opportunity in Systems Administrator jobs, the backbone of modern IT infrastructure. Systems Administrators are the essential professionals responsible for installing, configuring, maintaining, and securing the critical computer systems that organizations rely on daily. This dynamic profession sits at the intersection of technology and operations, ensuring network services, servers, and data remain available, performant, and protected. Whether managing on-premises data centers, cloud environments, or hybrid systems, these experts are the troubleshooters and guardians of an organization's digital ecosystem.

The core responsibilities of a Systems Administrator are vast and vital. Typically, they involve the deployment and maintenance of server hardware and operating systems, such as Windows Server or various Linux distributions. Daily tasks include monitoring system performance, applying security patches and software updates, and managing user accounts and access permissions. A significant part of the role is ensuring robust backup procedures and disaster recovery plans are in place and tested to guarantee business continuity. Furthermore, Systems Administrators configure and manage essential network services like DNS, DHCP, email, and file sharing. They provide crucial technical support, resolving complex issues that end-users or automated alerts may escalate, and meticulously document system configurations and procedures for consistency and knowledge sharing.

The skill set required for Systems Administrator jobs is both technical and interpersonal. A strong foundational knowledge of operating systems, networking concepts (TCP/IP, routing, firewalls), and virtualization platforms (like VMware or Hyper-V) is paramount. Proficiency in scripting languages such as PowerShell, Bash, or Python is highly valued for automating repetitive tasks and improving efficiency. As security is paramount, understanding cybersecurity principles, implementing security policies, and conducting vulnerability assessments are standard expectations. Beyond technical prowess, successful Systems Administrators possess exceptional problem-solving and analytical abilities to diagnose and resolve issues under pressure. Clear communication skills are essential for collaborating with IT teams, explaining technical concepts to non-technical stakeholders, and creating clear documentation.

Typical requirements for entering this field often include a bachelor's degree in computer science, information technology, or a related field, though relevant experience and professional certifications can be equally compelling. Certifications from vendors like Microsoft (Azure, Windows Server), CompTIA (Security+, Network+), Red Hat (RHCSA), or Cisco (CCNA) are widely recognized and can significantly enhance a candidate's profile. Employers generally seek candidates with a proven track record of managing IT systems, a keen attention to detail, and a commitment to continuous learning in a rapidly evolving technological landscape. For those with a passion for problem-solving and a desire to ensure the seamless operation of critical technology, Systems Administrator jobs offer a challenging, rewarding, and stable career path with opportunities across every industry.