Top Systems Administrator Jobs

Systems Administrator supporting Air Force test and demonstration activities. Responsibilities include defining system configurations, automating network asset deployment, installing and configuring software, troubleshooting, patching, hardening, configuration management, and supporting testing and technical meetings. The role requires virtualization, scripting, Windows and Linux experience, with preferred knowledge of Kubernetes, containers, infrastructure as code, Active Directory, and computer/network hardware.

Administer the company’s SaaS, cloud, identity, endpoint, and security platforms. Manage access, SSO, MFA, SCIM, audit logging, vendor security, user lifecycle, device policies, and automation using scripts and APIs. Respond to security incidents, maintain compliance controls and runbooks, provide tier 1–2 IT support, manage hardware and assets, and document internal procedures. The role requires broad systems ownership across AWS, Google Workspace, Rippling, and numerous business applications.

Manage and optimize geographically distributed, air-gapped server and workstation environments. Responsibilities include system administration, security hardening, vulnerability assessment, patching, certificate and Active Directory management, software and hardware deployment, backups, troubleshooting, documentation, and stakeholder coordination. The role supports Linux and Microsoft systems in high-assurance DISA environments and may involve virtualization, scripting, PKI, accreditation, and occasional domestic and international travel.

Administer Linux and Windows systems in VMware environments, including installation, configuration, monitoring, patching, security hardening, STIG compliance, backups, troubleshooting, and root cause analysis. Support RHEL-hosted applications and security tools, manage virtual machines and containers, resolve hardware and network issues, maintain documentation, perform evaluation testing, and provide occasional off-hours on-call support.

Provides onsite Tier 1 support for closed-area programs, troubleshooting Windows/Linux systems, Microsoft Office, domain connectivity, hardware, software, and virtualization environments. Manages tickets, installations, upgrades, documentation, Active Directory accounts, Group Policy, patching, antivirus tools, backups, and NAS systems. Escalates complex issues to higher-tier teams and participates in occasional off-hours outage restoration.

Maintains and troubleshoots secure voice, data, messaging, video telecommunications systems, equipment, circuits, and DRSN nodal infrastructure. Performs installations, de-installations, preventive and demand maintenance, system analysis, work-order and trouble-ticket management, documentation, and compliance reviews. Provides technical input on telecommunications programs and ensures security, compatibility, and standards compliance. Works independently, supports rotating shifts, and interacts with military officers and civilian officials.

Owns architecture, integration, lifecycle management, and operations for enterprise VMware and classified VDI environments. Manages ESXi hosts, vCenter deployments, VDI pools, profiles, NSX networking, vSAN, monitoring, alerts, and Kubernetes-adjacent platforms. Integrates virtualization with storage, networking, backup, disaster recovery, identity, and security controls. Leads migrations and cluster builds, troubleshoots infrastructure, establishes standards, mentors engineers, and collaborates across technical and business teams.

Supports Microsoft Windows and VMware infrastructure across physical and virtual environments. Responsibilities include installing, configuring, patching, monitoring, troubleshooting, and securing workstations and servers; administering Active Directory, DNS, DHCP, TCP/IP, and PowerShell; supporting engineering applications; maintaining backups and security remediation; and collaborating with internal customers and cross-functional teams. The role is fully on-site and requires an active Secret clearance.

Provides onsite technical support and systems administration for GEOINT mission-critical production systems. Responsibilities include diagnosing hardware and software issues, handling help desk requests, researching and resolving problems, documenting interactions, escalating urgent issues, preparing operational briefings, managing shared drives, and supporting configuration management. The role requires an active Top Secret/SCI clearance and availability for a 24x7 rotating shift schedule.

Provides onsite administration and security operations for classified, air-gapped IT systems. Responsibilities include managing Linux and Windows servers, Active Directory, VMware, Veeam, Trellix ePO, Nessus, Splunk, and Lab-in-a-Box environments; performing hardening, vulnerability remediation, data spill response, secure sanitization, backup, monitoring, documentation, and STIG/RMF compliance. The role requires active Secret clearance, Security+ certification, classified-environment experience, and occasional after-hours support.

Provides onsite Tier 1 IT support for closed-area programs, troubleshooting Windows and Linux systems, Microsoft Office, domain connectivity, peripherals, hardware, software, and virtualization environments. Manages tickets, user accounts, Group Policy, patching, antivirus tools, storage, and basic installations or upgrades. Documents resolutions, escalates complex issues, supports lab infrastructure, and participates in occasional off-hours outage restoration. Requires a computer-related degree, CompTIA Security+ certification, and Secret clearance eligibility or an active Secret clearance.

Designs and deploys secure Windows, Active Directory, Azure, network, and cloud environments in classified settings. Establishes secure baselines, hardens systems, supports RMF and ATO activities, resolves Windows issues, monitors logs, documents configurations, and provides cybersecurity architecture guidance. The role requires collaboration with ISSMs, ISSOs, project teams, and stakeholders while adhering to DoD security directives and NIST standards.

Administer and optimize a COTS ERP environment supporting payroll, benefits, and HR operations. Responsibilities include installation, configuration, patching, upgrades, performance tuning, access management, backups, disaster recovery, environment lifecycle management, and production migrations. The role also provides technical support, translates business requirements into configurations, and maintains architecture documentation, configuration logs, and SOPs.

Designs, develops, tests, troubleshoots, and documents software and networking systems in a Linux environment. The role performs system updates and monitoring, analyzes designs, debugs issues, writes testing plans and scripts, and collaborates with internal and external development partners to deliver reliable systems solutions.

Manages and maintains classified enterprise computing infrastructure for an Intelligence Community customer. Responsibilities include procuring, deploying, operating, and maintaining desktop, voice, video, internet, and network services; administering accounts; documenting systems; tuning performance; installing software; enforcing computing-resource policies; preparing monthly metrics reports; and resolving technical issues in a security-compliant environment. The role requires collaboration, customer service, strong communication, and potentially 24/7 on-call support.

Administers and improves enterprise infrastructure, including virtual servers, storage, operating systems, databases, security systems, monitoring, reporting, disaster recovery, and system integrations. Troubleshoots complex technical issues, manages upgrades and migrations, maintains documentation and standards, supports budgets and strategic planning, and mentors junior administrators. The role requires extensive infrastructure experience, DoD IAT Level II certification, U.S. citizenship, and an active Secret or higher clearance.

Administer and support Siemens Teamcenter and related PLM environments, including configuration, upgrades, patching, monitoring, troubleshooting, deployments, user support, documentation, and integrations with ERP, MES, and engineering systems. The role also supports multi-tier architectures, automation, system enhancements, vendor coordination, and continuous improvement across production and test environments.

Supports the full subcontract lifecycle, including solicitations, proposal reviews, awards, modifications, supplier coordination, invoice reconciliation, documentation, performance monitoring, and compliance. Coordinates with Legal, Procurement, Engineering, Quality, Finance, and Program Management teams. Prepares supplier metrics and supports process improvements while ensuring adherence to FAR/DFARS, DCAA, AS9100, trade compliance, and company requirements.

Provides on-site systems administration and service desk support for Carvana locations. Responsibilities include configuring and maintaining Windows and Mac systems, servers, networks, security equipment, AV, and user devices; resolving hardware, software, and connectivity issues; supporting installations, refresh projects, vendors, and new hires; monitoring systems and tickets; documenting solutions in Jira; maintaining inventory; and participating in on-call support. The role requires up to 60% travel and physical equipment handling.

Provides on-site systems administration and IT support for Carvana locations. Responsibilities include troubleshooting hardware, software, networking, servers, endpoints, AV, and mobile devices; configuring Windows and network services; monitoring systems; maintaining infrastructure inventory; documenting solutions in Jira; coordinating vendors and installations; supporting hardware refreshes; and participating in travel and on-call rotations.

Provides systems administration, deployment, maintenance, troubleshooting, automation, security patching, auditing, disaster recovery, and configuration management for physical and virtual IT systems supporting Space Systems Command. Manages Linux and Windows environments, VMware infrastructure, LAN systems, documentation, reporting, root cause analysis, and service optimization. Requires collaboration with government, military, contractor, and cross-functional teams, plus rotating on-call support.

Provides on-site systems administration, service desk, and infrastructure support. Responsibilities include configuring and maintaining Windows and networked systems, troubleshooting hardware, software, networking, AV, and mobile devices, supporting new-location deployments, coordinating vendors, monitoring tickets and SLAs, maintaining inventory, documenting solutions in Jira, and participating in on-call coverage. The role requires up to 60% travel, physical equipment handling, and support for both PC and Mac users.

Administers and maintains Cameo systems in a cloud and virtual desktop environment. Configures RHEL systems, monitors performance and storage, manages user sessions, profiles, groups, permissions, and accessibility, and provides technical support. Creates SOPs and runbooks, manages JIRA work items and change requests, supports Agile ceremonies, and collaborates with security and engineering teams on patching, scanning, software versioning, and ATO compliance.

Leads the design, implementation, security, automation, and operations of AWS, Linux, and Windows environments supporting federal law enforcement missions. Administers enterprise services, performs cloud migrations, applies security controls and compliance frameworks, develops infrastructure as code, and manages monitoring, backup, and disaster recovery. Troubleshoots mission-critical infrastructure issues, documents operational procedures, collaborates with stakeholders, and mentors system administrators. Requires active Secret clearance and eligibility for Top Secret clearance.

Administer VMware, Windows Server, Active Directory, enterprise storage, backup, networking, PKI, and Linux environments. Implement DISA STIGs, conduct vulnerability scans, remediate POA&Ms, patch systems, support RMF assessments, and maintain security baselines and documentation. Provide hardware support, monitoring, technology refresh assistance, and IT lifecycle support in a federal environment.