Top Systems Administrator Jobs

Administer and customize the Thunderhead application, estimate effort, implement enhancements, manage environments and deployments, run system/unit/integration tests, perform 2nd/3rd level production support and root cause analysis, monitor production, manage security permissions, and create template and form specifications.

Administer and support FileNet systems: plan and implement upgrades, patches, and migrations; migrate Image Services documents and reconcile; monitor systems, diagnose and fix issues; manage document classes, security, recovery, and repository maintenance.

Administer and support FileNet platform: plan and implement upgrades/patches, migrate Image Services documents, perform reconciliation reporting, monitor and troubleshoot systems, maintain document classes, security, recovery, and repositories.

Administer and support FileNet environments: plan and apply upgrades/patches, migrate Image Services documents, run reconciliation reporting, monitor and troubleshoot systems, and perform document class, security, recovery, and repository maintenance.

Administer and upgrade FileNet servers, perform migrations of Image Services documents, run reconciliation reporting, monitor and troubleshoot systems, provide mission-critical support, and maintain document classes, security, recovery, and repositories.

Provide on-site systems administration and functional support for DoD and federal procurement systems (PIEE, WAWF, FPDS, SAM.gov). Maintain security models, run Interactive SQL, manage user accounts, perform FPDS CAR and SAM.gov administration, deliver workforce training, develop SOPs, and ensure compliance with procurement data standards and DoD regulations to optimize contract writing and transaction environments.

Manage and secure enterprise Windows and Linux hosting environments, implement DevOps practices (CI/CD, IaC), automate administration with scripting, monitor performance, perform patching and vulnerability remediation, manage virtualization, support backup/disaster recovery, and collaborate with stakeholders to maintain mission-critical systems.

Senior systems administrator responsible for OS and server maintenance, Tier 2 helpdesk support, managing a Customer Service Center, training staff, and overseeing PC imaging and maintenance processes. Coordinates upgrades and enforces operational policies in support of federal test-range contracts.

Manage and maintain classified Linux/Windows infrastructures onsite: server and storage administration, access management, backups, virtualization (VMware), patching, and workstation support. Lead Red Hat installs, support engineering software phases, mentor junior admins, collaborate with cybersecurity to meet DoD security requirements, and ensure 24x7 operational readiness including after-hours work as needed.

Designs, implements, and supports network and server infrastructure. Manages network devices, patches, firmware, capacity planning, virtualization (VMWare), Windows and Linux servers, security updates, and vendor/system access. Monitors network health, documents changes, partners with teams on IT projects, and maintains compliance and operational reliability.

Administer and maintain MES (Siemens Opcenter/MESA) infrastructure and servers, ensure high availability, perform daily monitoring and troubleshooting, prepare SOPs and validation documentation, support change management and on-call response, and lead infrastructure projects in a semiconductor cleanroom environment.

Provide onsite systems administration for NORAD/Cheyenne Mountain operations: install/patch OS, troubleshoot hardware/software/network issues, manage VMs and backups, support operational databases, coordinate upgrades, and train/backup other administrators. Support classified communications and may require travel to forward sites.

Senior z/OS systems administrator responsible for mainframe upgrades, third-party product installs, patching, and collaboration with DBAs. Must have experience with TLMS, Data Domain, IBM MQ, CICS, and FTP/SFTP.

Provide day-to-day Microsoft 365 administration and end-user support (Exchange, SharePoint, Teams, OneDrive, Azure AD). Manage operational tickets, monitor system health, enforce security/compliance (Conditional Access, DLP, sensitivity labels, Defender), assist provisioning/license tasks, document activities, escalate complex issues, and support a compliance initiative in a hybrid on-prem AD environment.

Senior Systems Administrator responsible for designing, installing, maintaining, and supporting servers, networks, telephony/VoIP, virtualization, backups, monitoring, and security. Works with IT and non-IT staff, handles Level 1–2 support, prepares project status reports, and drives infrastructure improvements and disaster recovery planning.

Manage, configure, and maintain physical and virtual systems including backups, patching, performance tuning, AD administration, security (DISA STIGs/ACAS/Nessus), PowerShell automation, and troubleshooting across complex infrastructures.

Administer and support PeopleSoft 9.x (Payroll/HR/Benefits): analyze business/technical processes, translate requirements into PeopleSoft solutions, provide production support, develop customizations, document SDLC artifacts, generate reports, and communicate findings to stakeholders.

The Lab IT/OT Systems Administrator manages IT/OT systems in laboratories, ensuring reliable operation and support for scientific activities while establishing standards and documentation for growth.

Lead day-to-day system administration for cloud and on-prem systems: install, configure, maintain, optimize, and secure servers and networks. Perform capacity and performance analysis, automate admin tasks, train staff, manage application networking and load balancing, and conduct vulnerability management while supporting CUI and government security requirements in a fully remote Agile environment.

Provide remote and on-site IT support for MSP clients, monitor and maintain systems to prevent downtime, manage Windows Server and Windows 10 environments, administer Office 365, troubleshoot networking (TCP/IP), use RMM tools for system management, assist with Azure/AWS cloud support, document tickets, and mentor junior staff.

Senior Systems Administrator for USAISEC supporting classified and unclassified environments; administers Windows/Linux/AD servers, virtualization, and network infrastructure; enforces RMF/ATO controls, conducts vulnerability assessments and incident response, manages backups/disaster recovery, provides Tier II/III user support, and coordinates modernization and vendor activities.

Provide senior-level systems and network administration for the Sheriff's Office: configure, maintain, monitor, and troubleshoot servers, virtualization, storage, and security systems; manage AD/Entra ID, VMware, backups and network resources; lead and train IT staff; coordinate vendor repairs, disaster recovery, audits, and IT policy recommendations.

Administer, configure, test, and maintain purchased application systems (check processing). Troubleshoot with developers, vendors, and infrastructure teams; validate functionality after changes; support releases, upgrades, and performance tuning. Maintain system documentation and participate in change and release management.

Administer and maintain GxP-relevant manufacturing, engineering, and quality systems. Perform basic network troubleshooting, SQL database support, Active Directory tasks, OT device hardening, documentation, and support quality/validation processes while coordinating small projects and cross-functional troubleshooting.

Design, deploy, and maintain physical and virtual server infrastructure and virtualization environments for a cyber range. Administer ESXi/KVM/Xen, automate with Ansible and scripts (Bash/Python), manage SAN and VLAN, integrate sensors and OT/IoT/ICS/RF devices, maintain baselines/patching/RMF documentation for ATO, and provide operational support, triage, and rapid restoration during test and training events.