Top Systems Administrator Jobs

Administer and optimize enterprise .NET web applications across Azure, Windows Server, IIS, and SQL Server environments. Responsibilities include deployments, Tier 3 support, troubleshooting, incident response, automation, CI/CD, monitoring, release coordination, infrastructure administration, security improvements, and customer collaboration. The role supports highly available SaaS platforms and partners with development, DevOps, DBA, and business teams to improve reliability and operational efficiency.

Administer and configure application and database servers across development, testing, and production environments. Maintain CGI Momentum Financials, Kubernetes clusters, Windows and Linux systems, and OpenShift-based infrastructure. Implement information assurance controls, automate administrative tasks, support development and deployment activities, document configurations, and contribute to project planning. Collaborate with developers, database administrators, security specialists, and customers while independently resolving technical issues and managing competing priorities.

Administer and maintain AWS-based development, test, and production systems across Windows and Linux environments. Manage OpenText and PeopleSoft applications, cloud infrastructure, batch processes, backups, user accounts, security monitoring, incident resolution, and system performance. Automate production processes, execute zero-downtime infrastructure changes, maintain NIST and intelligence-community compliance, and provide customer support including after-hours and on-call coverage.

Administer, configure, test, diagnose, and repair Linux servers and applications in a defense RDT&E environment. Automate administrative tasks with scripts, support directory services, storage, networking, and cybersecurity functions, and troubleshoot Cisco-based connectivity. Ensure servers and networks meet approved specifications for test and training events while adapting configurations to changing mission requirements and rotating work schedules.

Administer and optimize hybrid Windows and Azure infrastructure, including Active Directory, Entra ID, Microsoft 365, virtualization, automation, patching, security hardening, monitoring, and compliance. The role develops PowerShell and Ansible automation, manages virtual machines and system lifecycles, supports identity and cloud services, troubleshoots complex infrastructure issues, and maintains documentation and audit evidence aligned with NERC CIP requirements.

Administers enterprise infrastructure, servers, networks, databases, applications, and integrations. Designs and tests workflow and system solutions, develops automation using PowerShell, T-SQL, and .NET, supports ERP and manufacturing applications, coordinates vendors and releases, maintains security controls for DFARS, NIST SP 800-171, and CMMC Level 2, and serves as a senior escalation point for incidents, upgrades, migrations, and projects.

Lead end-to-end production title setup and master data maintenance across production finance systems. Configure and validate SAP-related financial structures (WBS, company codes, coding strings), location accounting setups, and internal database records. Coordinate cross-functional stakeholders, drive onboarding and deactivation workflows, perform monthly data validations, support system projects, testing, and data cleanups, and serve as subject-matter expert for production finance master data and system-driven processes.

Supports enterprise servers and infrastructure through monitoring, administration, troubleshooting, patching, backups, hardware deployments, and performance management. Maintains Active Directory, Group Policy, Exchange, documentation, and system configurations. Responds to IT tickets, participates in maintenance and infrastructure projects, supports financial center infrastructure, and joins an on-call rotation after training. The role is initially on-site before transitioning to a hybrid schedule.

Provides desk-side, phone, remote, and site IT support for data center teams, vendors, and support personnel. Installs and configures Microsoft, cloud, networking, and endpoint technologies; diagnoses and resolves technical issues; maintains systems, backups, networks, and mobile devices; manages equipment purchasing and upgrades; documents repairs in Zendesk; supports ISO 27001 policies; and provides user training and on-call support.

Administers on-premises and cloud infrastructure, servers, networks, identity services, Microsoft 365, cybersecurity controls, backups, business applications, and end-user systems. Troubleshoots complex infrastructure issues, supports Epicor ERP and SQL Server, automates administration with PowerShell, coordinates vendors, maintains documentation, and supports disaster recovery and business continuity in an industrial manufacturing environment.

Maintains and engineers operating systems, system software, monitoring tools, hardware, and data center infrastructure. Ensures reliability, performance, security, disaster recovery, and compliance standards. Develops scripts and test plans, performs hardware repairs, manages vendors and budgets, leads process improvements, documents metrics, collaborates across teams, and mentors junior staff. The role operates in a hybrid environment with occasional travel, extended hours, and rotational on-call duties.

Administer Windows desktops and servers, corporate networks, Azure Active Directory, Microsoft 365, Teams, virtualization platforms, storage systems, and network hardware. Troubleshoot complex infrastructure incidents, perform root-cause analysis, manage hardware and software inventory, document technical procedures, and respond to support tickets. The role requires customer-service skills, collaboration, equipment handling, a driver’s license and vehicle, and travel to company locations in the Tri-State area.

Administer and improve the company’s ERP platform through system monitoring, troubleshooting, configuration, integrations, updates, access management, reporting, automation, documentation, training, and end-user support. The role partners with business teams to translate operational needs into system improvements, maintain reliable processes, communicate changes, and prioritize projects aligned with business goals.

Provide systems administration and support for servers, workstations, storage, and classified networks. Troubleshoot performance and connectivity, install/configure capabilities in operational environments, manage end-user devices, apply logistics processes for IT asset accountability, and operate in a 24/7 shift environment supporting Microsoft and RHEL servers, VMware, and SIPRNet.

Provides advanced systems administration, troubleshooting, software installation, performance tuning, hardware and software auditing, backup and recovery, networked system maintenance, and end-user support. The role manages complex workstation and server environments, supports VDI and Citrix technologies, trains users, guides junior staff, and may lead technical tasks while supporting Intelligence Community missions.

Provides senior systems administration in an Army environment, managing Active Directory, cloud storage, system registrations, SharePoint, and network access. Conducts STIG analysis and remediation for DoD compliance, supports smartcard account registration, resolves account, network, remote-access, and Wi-Fi issues, and recommends technology solutions. Requires extensive government or government-client technical experience, student-environment support, an active Secret clearance, Security+ certification, and Microsoft 365 certification.

Administer and engineer physical and virtual infrastructure for NAVAIR, including servers, workstations, virtual machines, containers, networking, backups, software, and user access. Troubleshoot hardware and software, maintain documentation and disaster recovery plans, provide technical support, and participate in Agile planning. Secure and continuously monitor information systems according to DoD guidance, including RMF and STIG compliance activities.

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.

Installs, administers, monitors, and supports servers, SAN/NAS storage, applications, cloud services, Microsoft 365, operating systems, backups, security updates, and network infrastructure. Troubleshoots system issues, manages accounts and access permissions, supports performance and capacity planning, maintains security certificates, and assists with data center operations, documentation, compliance, and helpdesk guidance. Requires occasional travel between clinics and corporate offices and may involve after-hours support.

Performs classified systems and network administration, including server deployment, firewall management, patching, account administration, security monitoring, documentation, troubleshooting, system accreditation, and risk mitigation. Leads IT projects, supports users, maintains Windows environments, and coordinates with information assurance teams. The position is onsite in Cambridge, Massachusetts and requires a current Top Secret clearance.

Maintain Windows and virtual servers across a geographically distributed enterprise. Manage Active Directory objects, security groups, access, DNS, DHCP, sites, replication, and topology. Deploy software and patches using Microsoft Endpoint Configuration Manager and Endpoint Manager. Deploy and maintain McAfee security products, troubleshoot software and patch failures, and operate Aspera data transfer tools. An active TS/SCI clearance with full-scope polygraph is required.

Maintains multi-user computer systems by managing accounts, documentation, performance, software installation, storage, backups, recovery, and computing-resource policies. Coordinates with network engineers, recommends hardware and software purchases, oversees installations, and supports system operations for a government customer. The role requires a bachelor's degree, at least three years of relevant experience, and an active TS/SCI clearance with full-scope polygraph.

Senior Systems Administrator responsible for ServiceNow management, incident troubleshooting and escalation, server infrastructure deployment and maintenance, IT security compliance, documentation, project leadership, stakeholder and vendor coordination, and serving on weekly on-call rotation for the Merrimack production environment.

Administer, design, test, secure, patch, and implement Linux-based systems and workstations supporting Air Force Intelligence Operations. Develop Ansible automation, troubleshoot RHEL environments, validate system changes, and contribute to virtualization, cloud, monitoring, and secure-access solutions. The role requires collaboration with customers to translate mission needs into resilient technical capabilities across global, multi-infrastructure systems.

Administers business-critical enterprise applications supporting university operations. Responsibilities include application configuration, upgrades, integrations, automation, security, identity management, data exchanges, ETL processes, monitoring, documentation, vendor coordination, compliance, disaster recovery, and stakeholder support. The role serves as a technical owner for enterprise platforms and collaborates with developers, infrastructure teams, data analysts, vendors, and business users.