Top Systems Administrator Jobs

The Systems Administrator will ensure system operations, monitor health, troubleshoot issues, and lead security protocols for government projects.

Maintain and remediate Windows Server and workstation security in isolated environments: apply patches and STIGs, remediate vulnerabilities using Tenable/SCAP, support VDI/VMware, use SCCM/MECM occasionally, administer Group Policy, troubleshoot Windows stability and application services, and collaborate with security, customers, and teams while working on-site full time.

Manage, configure, and troubleshoot operating systems, networks, and virtualization platforms. Develop automation scripts, design backup/recovery procedures, perform user account administration and system monitoring, manage Active Directory and group policies, and collaborate with cross-functional teams to support IT projects and improve infrastructure reliability and efficiency.

Lead systems administrator responsible for implementing, maintaining, and securing Windows and Linux server environments, virtualization (VMware/Horizon), identity services (Microsoft Entra ID), backups/disaster recovery, endpoint management, scripting (PowerShell/Bash/Python), troubleshooting, compliance, and mentoring/site leadership. Provides Tier 1/2 escalation, supports hybrid cloud initiatives, and participates in after-hours maintenance and incident response.

Senior systems administrator responsible for installing, configuring, monitoring, and securing Windows and Linux servers, virtualization, backup/disaster recovery, cloud identity (Azure AD), automation with PowerShell/Bash/Python, endpoint management, and Tier 1/2 support. Mentor junior admins, maintain documentation, support audits and compliance, and participate in incident response and maintenance activities.

Lead administration and support of Windows and Linux enterprise infrastructure, including Active Directory, virtualization (VMware), identity (Azure AD), backup/DR, endpoint management, automation (PowerShell/Bash/Python), security patching, and Tier 1/2 escalation. Mentor junior admins, produce documentation, support hybrid cloud initiatives, and assist incident response and compliance activities.

Administer and maintain Windows and Linux servers, Active Directory, virtualization (VMware), identity services (Microsoft Entra ID/Azure AD), backups/disaster recovery, endpoint management, security patching, automation (PowerShell/Bash/Python), and provide Tier 1/2 escalation, mentoring, documentation, and cross-team collaboration to ensure availability and compliance.

Senior systems administrator responsible for secure, classified IT environments: configure and maintain Lab-in-a-Box, VMware, backups, endpoint protection, vulnerability scanning, Active Directory/GPOs, Splunk logging, and ensure STIG/RMF/NISPOM compliance. Lead data spill response, system sanitization, documentation, and audit readiness while collaborating with security stakeholders in a 100% onsite classified area.

Maintains HRCU’s networks, servers, operating systems, cloud services, databases, telecommunications, security controls, and end-user technology. Manages Active Directory, Group Policy, DNS, DHCP, patching, backups, disaster recovery systems, performance monitoring, vendor escalations, and IT help requests. Supports compliance and disaster recovery testing while troubleshooting hardware and software. Requires 3–5 years of related experience, an associate degree in IT or a related field, and experience with Azure and virtualized environments.

Provides Tier 1 and 2 desktop and systems administration support for Department of State users. Manages ServiceNow tickets, troubleshoots and repairs computers, servers, operating systems, applications, printers, smartcard readers, scanners, and other peripherals. Installs and configures hardware and software, mitigates security issues, documents resolutions, coordinates escalations, meets SLAs, supports facility transitions, prepares reports, and trains users.

Supports internal corporate IT by installing, configuring, monitoring, maintaining, and troubleshooting physical and virtual servers and related software. Manages Active Directory, DHCP, DNS, certificates, patching, upgrades, testing, application integration, and automation. Assesses vulnerabilities, supports incident response and security assessments, and helps maintain compliance and system reliability. Hybrid work in Fairfax, Virginia may include occasional non-standard hours for patching and upgrades.

Administer and support business-critical on-premise and cloud infrastructure, including Windows Server, Hyper-V, SAN storage, Microsoft 365, Azure, Active Directory, Group Policy, and Intune. Monitor system performance, troubleshoot incidents, manage configurations, patch and upgrade applications, support deployments, improve automation, and maintain high availability and security. Collaborate with infrastructure, cybersecurity, engineering, business, and supplier teams on architectural improvements and technical projects. Provide critical escalation support and occasional on-call coverage.

Administer and maintain enterprise Windows Server infrastructure supporting U.S. Navy mission operations. Responsibilities include troubleshooting servers and applications, performance tuning, hardware upgrades, vulnerability remediation, SQL database administration, documentation, technology recommendations, and maintaining secure, highly available environments. The role requires support for Microsoft enterprise services, cloud infrastructure, virtualization, and potential travel to CONUS and OCONUS Navy commands.

Administer, support, and optimize Microsoft Dynamics 365 F&O and CE environments, Azure resources, and Power Platform. Manage security, licensing, backups, upgrades, integrations, performance monitoring, and end-user support while collaborating with IT and business stakeholders to maintain secure, reliable, and well-governed systems.

Manage and optimize Windows, Linux, and macOS infrastructure; support cloud migrations, system upgrades, patching, monitoring, backups, and restores. Administer identity and endpoint platforms including Active Directory, Microsoft Entra, Microsoft 365, Intune, and Apple device management tools. Provide escalation support, troubleshooting, documentation, security collaboration, network operations assistance, and automation through scripting.

Supports on-premises classified systems by administering Windows and Red Hat Linux servers, virtualization, storage, identity services, monitoring, backups, and documentation. Performs approved maintenance, patching, provisioning, troubleshooting, restoration testing, migrations, and continuity exercises under senior oversight. Responds to incidents, verifies system health, maintains technical records, and escalates complex issues. Coordinates with network, cybersecurity, application, and service desk teams to sustain mission operations.

Administer, support, and optimize Microsoft Dynamics 365 (F&O and CE) and related Microsoft platforms. Manage Azure and Power Platform resources, security roles and access, licensing coordination, environment governance, performance monitoring, upgrades/patches, integrations, backups, and end-user support. Collaborate with IT and business teams and maintain documentation.

Administer enterprise patch management and vulnerability remediation across DoD-managed systems, applications, and endpoints. Provide 24/7 incident support, conduct vulnerability assessments, deploy patches, correct configurations, remediate ACAS and Nessus findings, and maintain compliance with IAV, STIG, RMF, and NIST controls. Use SCCM, PowerShell, and Recast Right Click Tools for automation and remediation. Document compliance, deployment, and remediation activities, and train IT personnel on patching and vulnerability management workflows.

Administer and secure Microsoft identity, endpoint management, device compliance, and corporate infrastructure across hybrid office and lab locations. Manage Entra ID, Intune, Defender, Microsoft 365, MDM, servers, firewalls, VPNs, networks, and wireless systems. Support CMMC Level 2, NIST SP 800-171, and ITAR-aligned controls; monitor compliance, remediate drift, document systems, support audits, and lead incident response. Provide escalated end-user support, hardware provisioning, and onboarding/offboarding assistance as needed.

Administer and govern PDM/PLM systems (Autodesk Vault, SolidWorks PDM, PTC Windchill). Ensure engineering data integrity, BOM and item/master alignment, troubleshoot multi-CAD issues, support upgrades, migrations, and governance activities, and collaborate with engineering, IT, manufacturing, and business stakeholders.

Administer and secure multi-site Windows Server and cloud infrastructure (Microsoft 365, Azure, Entra ID). Manage identity, endpoints (Intune/SCCM), networking, backups, DR, and HIPAA-compliant systems. Lead incident response, vulnerability remediation, documentation, cross-site projects, and knowledge sharing to improve reliability and resilience.

Provides information assurance and systems administration for classified and unclassified systems supporting Warfighter Exercises. Responsibilities include server and network administration, vulnerability management, RMF and STIG compliance, ACAS scanning, patching, cybersecurity troubleshooting, access control, backup and recovery, and technical documentation. The role requires Windows and Linux administration, McAfee security product expertise, Security+ certification, and a Secret clearance.

Maintain and secure server, network, storage, and endpoint infrastructure. Responsibilities include system configuration, monitoring, troubleshooting, patching, backups, disaster recovery, access management, network security, incident response, performance optimization, and documentation. The role collaborates with IT, security, compliance, sales, management, and operations teams in a regulated environment.

Administer and secure Linux RHEL and broader IT infrastructure, including servers, networks, firewalls, encryption devices, and container platforms. Build automation and CI/CD capabilities, perform patching and deployments, manage system lifecycles, document configurations, resolve Tier II issues, and support accreditation and security compliance. Coordinate risk management with IT leadership and Information Assurance, validate system performance, and provide guidance to junior staff.

Administer Windows endpoints, servers, Azure/Entra ID, Intune, and enterprise patch management using WSUS. Serve as a Tier 3 escalation resource, coordinate with an MSP, manage vulnerability remediation, and lead onboarding and lifecycle administration for software, hardware, laboratory instruments, and engineering systems. Maintain regulated-environment documentation, runbooks, compliance records, and change controls while supporting reliable, secure, inspection-ready infrastructure.