Top Systems Administrator Jobs

Administers and supports Windows desktops, servers, virtual environments, networks, VoIP systems, security tools, and business applications. Installs and upgrades hardware and software, applies patches, troubleshoots incidents, manages backups and disaster recovery, and provides escalated helpdesk support. Maintains documentation, performs root-cause analysis, supports infrastructure projects, and travels to branch locations as needed. Requires occasional off-hours support and physical ability to move equipment up to 75 pounds.

Provides first-level technical support, resolves and escalates customer issues, documents incidents, produces activity reports, and follows problems through closure. Investigates system issues independently and supports security compliance by assessing vulnerabilities, implementing controls, and reviewing security logs. The role also recommends process improvements and requires systems administration, help desk, and Jira experience.

Engineer, secure, and maintain enterprise Linux and FreeBSD infrastructure across bare-metal, virtualized, containerized, and cloud environments. Develop SELinux policies, implement DISA STIG and CIS security baselines, manage CMMC-compliant secure enclaves for CUI, and automate patching, configuration management, and compliance auditing with tools such as Ansible. Troubleshoot complex operating system, networking, storage, kernel, and hypervisor issues while serving as a technical authority for system architecture and security compliance.

Manages and maintains Workday HCM systems, including configuration, testing, upgrades, releases, troubleshooting, documentation, compliance, and process improvements. Serves as a Workday subject matter expert, coordinates system projects and change management, performs root cause analysis, manages vendors, and supports HR business processes across multiple Workday modules.

Administers, troubleshoots, secures, and optimizes containerized application infrastructure. Manages Kubernetes clusters, container runtimes, networking, storage, deployments, scaling, upgrades, patching, image lifecycles, and observability. Creates architecture and configuration documentation, supports security authorization artifacts, implements STIGs and CIS benchmarks, and assists with CI/CD pipelines, Helm charts, and infrastructure configurations. Requires active TS/SCI clearance and the ability to obtain and maintain a polygraph.

Monitors, maintains, and troubleshoots server, endpoint, application, and network infrastructure to maximize uptime. Responsibilities include patching, upgrades, backups, performance tuning, vulnerability remediation, disaster recovery testing, documentation, licensing, audits, and Tier 2 support. The role also assists with budgeting, infrastructure purchases, and provides on-call support during evenings, weekends, and holidays.

Administer hybrid Windows and Linux infrastructure across on-premises and Azure environments. Manage Active Directory, identity, endpoints, servers, virtualization, networking, backups, certificates, domains, assets, and licenses. Automate administration with PowerShell, monitor systems, troubleshoot root causes, document procedures, enforce change controls, and standardize IT operations across multiple business entities. Support acquisitions, site turn-ups, office moves, and periodic travel to operating-company locations.

Administer and secure Azure Government cloud environments for a government customer. Responsibilities include subscription and application hosting management, identity and access administration, vulnerability and STIG compliance, CTO response, network and firewall troubleshooting, software updates, scripting with Azure CLI and PowerShell, service desk issue resolution, and technical communication. The role requires active Secret or Top Secret clearance, Security+ or equivalent certification, and an Azure or identity certification or equivalent experience.

Administers NetSuite and related finance applications, including user access, permissions, configuration, issue triage, integrations, data loads, reporting, change management, testing, and vendor coordination. Provides Tier 1–2 support to Finance and Accounting teams, maintains audit-ready documentation, supports access reviews and internal controls, and coordinates with IT and Business Enablement to resolve issues and manage releases.

Provide Level 3 escalation and advanced support for client and internal IT systems. Troubleshoot complex infrastructure issues, develop and document solutions, support projects and key accounts, participate in on-call rotation, and collaborate with engineering, sales, and clients to maintain system reliability.

Resolves complex desktop, server, networking, email, virtualization, and systems administration issues. Maintains Active Directory, DNS, DHCP, Group Policy, Exchange, Microsoft 365, Cisco and Meraki networks, VMware, Hyper-V, printers, VPNs, and monitoring tools. Supports field technicians and dealership applications, investigates recurring service desk problems, assists with audits, handles Saturday on-call coordination, prioritizes escalations, and provides technical guidance to lower-tier support staff.

Install, configure, maintain, monitor, secure, and upgrade Red Hat Linux and UNIX servers in mission-critical environments. Responsibilities include troubleshooting operating system and networking issues, managing backups and recovery, configuring hardware, automating scheduled tasks with scripts, supporting users through on-call rotations, and following DISA STIG security procedures. The role requires an active Secret clearance, DoW 8140-compliant certification, and Red Hat Linux or UNIX administration certification.

Provides independent systems administration for physical and virtual IT environments at a DOE site. Responsibilities include managing Windows and Linux servers, Active Directory, permissions, storage, Group Policy, VMware platforms, infrastructure troubleshooting, vulnerability remediation, vendor coordination, cybersecurity compliance, documentation, and support for technical teams and end users.

Supports Windows endpoint administration for an enterprise federal program, including imaging, configuration, software deployment, patching, security compliance, troubleshooting, and end-user assistance. Maintains endpoint and enterprise service reliability using tools such as SCCM, JAMF Pro, BigFix, Active Directory, Group Policy, PowerShell, Windows Server, and VMware. Documents incidents, procedures, configurations, and resolutions; supports change management and security requirements; and escalates complex issues while maintaining ownership of assigned work.

Administers Cisco network hardware, RHEL systems, servers, security patches, and containerized applications. Monitors system and network performance, resolves hardware, software, connectivity, and security issues, and maintains compliance with DoD standards, STIGs, and related security requirements. Collaborates with IT support teams to improve system availability and operational integrity. The role requires an active Secret clearance with Top Secret/SCI eligibility and an active DoD 8570 IAT Level II certification or higher.

The Systems Administrator designs, configures, and maintains company infrastructure, including cloud systems, networks, firewalls, and SaaS tools. Responsibilities include escalated support, access administration, vendor coordination, infrastructure troubleshooting, and leading migrations, software rollouts, and cross-functional IT projects. The role also supports SOC 2 audit evidence and controls, documents IT processes, and pilots AI-driven service improvements. This is an onsite position requiring collaboration with distributed teams and occasional travel.

Provides on-site technical support and systems administration for employees and company infrastructure. Responsibilities include troubleshooting hardware, software, networks, accounts, mobile devices, printers, and MFA; onboarding and offboarding users; configuring systems; maintaining documentation and workflows; supporting SOX audits and permissions reviews; monitoring backups; and ensuring infrastructure compliance. The role also provides user training, coordinates with partners, and performs routine system audits.

Leads sustainment and administration of Red LAN servers, virtualized services, operating environments, storage, accounts, patches, backups, and configurations. Resolves escalated infrastructure issues, monitors system resources, performs security administration, maintains documentation, installs software, manages storage allocation, and supports backup recovery. Coordinates with network engineers and vendors, recommends hardware and software purchases, develops resource-use policies, and may supervise junior staff.

Administers enterprise IT systems, software, networks, cloud infrastructure, hardware, and cybersecurity systems. Manages asset lifecycles, operating systems, infrastructure as code, automation, identity integrations, virtualization, containerization, CI/CD, troubleshooting, and technical documentation. Coordinates IT and infrastructure initiatives with engineering programs and external partners while supporting secure, reliable business operations.

Provides administration and sustainment for large-scale Linux systems, including software installation, configuration, monitoring, troubleshooting, security compliance, and infrastructure optimization. Supports compute, networking, memory, storage, virtualization, automation, containers, and distributed filesystems. Uses Bash and Python scripting, Red Hat Satellite, Splunk, VMware ESXi, SaltStack, Ansible, Docker, and monitoring tools. Kubernetes, additional distributed filesystems, and Atlassian tools are preferred. Requires extensive systems administration experience, Security+ certification, and an active Top Secret/SCI clearance with polygraph.

Supports hybrid IT infrastructure across on-premises systems, Microsoft Azure, and Microsoft 365. Administers identity platforms, user lifecycles, permissions, virtual servers, Windows systems, network equipment, and clinic technology. Handles helpdesk escalations, patching, monitoring, security operations, acquisition integrations, documentation, and migration tasks. Provides technical guidance to teammates and communicates with users, clinic personnel, and vendors. The role is primarily in-office, includes approximately 25% travel, and may require occasional after-hours maintenance work.

Install, configure, administer, secure, and optimize Windows physical and virtual servers. Support Microsoft SQL databases, Active Directory Certificate Services, VMware and Hyper-V clusters, patching, virus updates, certificate management, and performance tuning. The role also supports Linux systems, security-controlled environments, Assessment and Authorization processes, data architecture, storage networks, and mission-critical IT infrastructure at a customer site.

Maintain and support company systems, networks, servers, cloud applications, endpoints, databases, backups, and cybersecurity tools across multiple locations. Provide Tier II support, administer Windows and Active Directory environments, manage infrastructure and vendors, monitor security and backups, and mentor Tier I staff. Lead AI tool adoption, data analytics and reporting using SQL and Power BI, systems integration, technical training, and IT improvement projects. Occasional after-hours work and business travel are required.

Administer physical, virtual, and cloud servers for a USAF program. Responsibilities include provisioning systems, managing configurations and authorized access, deploying updates, monitoring performance and security, applying patches and STIGs, remediating vulnerabilities, developing automation scripts, supporting incident response, maintaining documentation, assisting RMF and ATO compliance, and conducting recovery testing.

Provide field and escalation support for clients by troubleshooting end-user issues, administering Microsoft technologies, supporting VMware and Hyper-V environments, managing backup and disaster recovery solutions, and configuring network infrastructure. Communicate with customers, document procedures and service tickets in ConnectWise, track work and expenses, and collaborate independently in a fast-paced client-focused environment.