Top Systems Administrator Jobs

Manage and secure classified IT systems in closed areas: Active Directory user/group administration, desktop imaging and hardening, virtual server management, monthly OS/application patching per STIGs, DNS/DHCP/GPO maintenance, logging and incident response, RMF compliance support, documentation, and audit/accreditation activities.

The Systems Administrator manages system performance, security, and infrastructure while providing support for Windows and Linux environments. Responsibilities include monitoring, troubleshooting, and maintaining systems and backups, and implementing security measures.

The Senior Systems Administrator at Boeing will manage systems, perform maintenance, support security measures, and ensure optimal system performance across Windows and Linux environments.

Maintain, configure, and secure enterprise and air-gapped systems onsite. Provide Tier II support, install and patch servers and desktops, manage virtual machines, administer Red Hat Linux, monitor systems, document procedures, escalate issues, and ensure compliance with DoD security standards and organizational policies.

Lead negotiation, drafting, and management of indirect contracts (IT, facilities, SaaS, professional services). Manage vendor relationships, mitigate contract risk, ensure compliance with company and government requirements, create purchase orders, collaborate with finance, legal, supply chain and engineering, and optimize costs and contract performance.

Manage and support multi-vendor enterprise storage arrays (Dell, HP, NetApp), backups and tape libraries, SAN zoning/LUN provisioning, storage performance/capacity monitoring, migrations and restores, VDI support, firmware/patch management, data center cabling/configuration, on-call and after-hours maintenance, and coordinate with security and internal customers in a secure environment.

The IT Systems Administrator II manages IT systems in classified environments, focusing on user account administration, desktop and virtual server support, security compliance, and system documentation.

Provide daily administration and SLA-driven support for Citrix environments (XenApp, XenServer, NetScaler). Maintain published applications, profile management, Provisioning Services, load balancing, VM management, DHCP and Group Policy. Troubleshoot networking (AD, DNS, WINS, TCP/IP, LDAP, SMTP), storage (NAS/SAN) and backup/recovery. Manage incident/service tickets and change processes, and communicate with clients and internal teams.

Provide systems administration for Linux environments; use automation tools (Chef, Puppet) to manage configurations; manage and administer logging platforms (Splunk or ELK stack); FluentD administration a plus. Work independently and with teams, communicate effectively, adapt to shifting priorities, and provide strong customer service and problem solving.

Maintain and secure enterprise network infrastructure (LAN/WAN/VPN/DMVPN/data center), troubleshoot incidents and outages, manage lifecycle of networking hardware, implement cybersecurity controls, use monitoring tools to optimize availability and performance, document standards and follow change control and compliance practices. Provide after-hours support and coordinate with IT and operations teams.

The Systems Administrator maintains SoundStack's infrastructure, deploying and troubleshooting servers, supporting incident management, and improving operations with automation tools.

Designs, implements, maintains, and troubleshoots server infrastructure and applications. Manages virtualization, backups, disaster recovery, licensing, monitoring, and security per NIST/ITIL. Provides escalated support, mentors junior staff, documents processes, and reports project status. Onsite in Phoenix with on-call responsibilities.

Provide middleware production support and troubleshooting for JBoss/Tomcat/Apache/JMS and ESB/portal/identity platforms. Administer source control (Subversion), manage Hudson build jobs, participate in design reviews, provide on-call and after-hours implementation support, and collaborate with architects and operations teams. Support Solaris/CentOS/Windows environments and welfare eligibility case management systems.

Lead and maintain reliability, security, and performance of on-premises and cloud infrastructure across Windows, Linux, macOS, Microsoft 365, Azure/AWS, identity, endpoints, backups, monitoring, and service management. Act as escalation point, mentor teammates, manage incidents/changes in Jira, document in Confluence, automate tasks with scripting, and support compliance and disaster recovery in regulated environments.

Senior systems administrator responsible for deploying web applications, managing Linux servers, writing Puppet modules, supporting WSO2 middleware, maintaining Git/Subversion, working with dev teams to troubleshoot, and developing tools to improve infrastructure.

Onsite Unix Systems Administrator to inventory, administer, and harden Sun Solaris servers; install/configure new systems, migrate applications/databases, implement backups, failover and disaster recovery, diagnose hardware, manage patches, and document procedures and capacity planning.

Onsite systems administrator to triage and support CA commercial off-the-shelf products, document processes, coordinate with vendors, and maintain Windows, SQL, Unix, and Microsoft System Center environments.

Senior Systems Administrator to manage and improve agency infrastructure, lead special technical projects (AD/GPO redesign, VDI refresh, DR tests), troubleshoot network/server performance, implement backup and endpoint/EDR solutions, and support Exchange migration and cabling/diagramming initiatives.

Onsite senior systems administrator responsible for Linux server management and deployment, web application deployment, Puppet module development, maintaining WSO2 middleware, managing Git/Subversion, and supporting ELK/ActiveMQ-based infrastructure while collaborating with development teams.

Provide on-site systems administration and production support: apply patches and updates, perform routine application, middleware and database maintenance, deploy releases, monitor service performance, use automation and job-scheduling tools, coordinate with DBAs and hosting/help-desk, and drive continual service improvements.

Onsite Windows systems administrator to plan and implement migration from Server 2003 to Server 2008 domain controllers, raise domain functional level, upgrade Exchange, review and remediate Active Directory and Group Policy for security/availability/disaster recovery, produce a detailed project plan for Change Management, and document all changes.

Install, configure, test, and support server and desktop hardware/software; respond to incident and request tickets; monitor application servers and diagnose performance bottlenecks; document server builds, disaster recovery, and procedures; review audit logs and security and participate in application server implementations with IT staff.

Onsite systems administrator to migrate Microsoft Project Server 2003/PWA to Project Server 2013/PWA. Responsibilities include reviewing existing SharePoint/SQL environments, designing architecture, installing/configuring hardware and software, data migration, authentication and security planning, performance/capacity and DR planning, BI/reporting planning, writing documentation, and conducting knowledge transfer and operational support.

Own and improve reliability, security, and performance of on‑premises and cloud infrastructure across Microsoft 365, Windows/Linux/macOS, Azure/AWS, identity, endpoints, and collaboration platforms. Lead incident response, patching, monitoring, backups, compliance for controlled environments (GCC High/ITAR), mentor junior staff, automate operations, and manage service records using Jira/Confluence while supporting engineering application integrations and infrastructure modernization.

Provide systems administration for mission-critical IT and operational technology supporting an FBI component: troubleshoot servers, monitor performance, maintain backups/disaster recovery, deploy/patch/certify systems, and drive operational improvements.