Top Systems Administrator Jobs

Provide day-to-day administration and user support for Workday Adaptive Planning and related financial systems. Maintain models, reports, integrations, and security; validate data and reconcile between ERP and planning systems. Support planning cycles, system enhancements, UAT, training, and audit/compliance activities while collaborating with Finance, Accounting, IT, and vendors.

Provides onsite end-user IT support, troubleshooting hardware, software, networking, connectivity, and user access issues. Configures and deploys computers, mobile devices, peripherals, applications, updates, and security tools. Manages helpdesk tickets, Microsoft 365, Azure, Exchange Online, Windows environments, accounts, permissions, and documentation. Supports IT projects, installations, upgrades, process improvements, and cross-functional technical resolution. The contract lasts 3–6 months, with onsite work Monday through Thursday and remote work on Fridays.

Maintain end-user devices, Windows Server, Azure, Microsoft 365, identity systems, networking, VoIP, backups, disaster recovery, patching, and endpoint security. Coordinate with external IT providers and vendors, support reporting tools, document procedures, troubleshoot issues end-to-end, and lead continuous improvement initiatives in an on-site environment.

Administer and configure pharmacovigilance safety databases, ensuring data integrity, security, regulatory compliance, and system validation. Support integrations with E2B gateways, submission platforms, and signal detection tools. Provide user support and training, manage access roles, troubleshoot issues, and generate validated safety reports, metrics, and dashboards. Contribute to database upgrades, migrations, automation, audit readiness, and documentation while collaborating with PV operations and cross-functional teams.

Administer and secure hybrid IT infrastructure across SaaS, on-premises data centers, networks, identity systems, virtualization, storage, and security platforms. Serve as a Tier 2/3 escalation point, automate provisioning, manage backups and disaster recovery, maintain PKI and authentication, monitor systems, document processes, and support global hybrid-workforce users. The role requires systems administration, scripting, enterprise networking, Windows infrastructure, virtualization, identity management, and experience in regulated environments.

Administer, configure, patch, harden, monitor, and troubleshoot Linux systems, servers, workstations, networks, and hardware in lab and development environments. Support developers and engineering teams, respond to critical incidents, perform package management and performance tuning, build custom RPMs, automate maintenance with shell scripts, and document infrastructure. The role may be filled at Principal or Senior Principal level and requires holding or obtaining a DoD Secret clearance.

Provide day-to-day administration, monitoring, troubleshooting, and maintenance of enterprise IT systems. Support client/server, storage, network, and OS environments, deliver Tier 1/2 support, automate configuration/deployment with Ansible and Terraform, and support AWS cloud infrastructure while maintaining system reliability, documentation, and incident response.

Administer and improve global IT infrastructure across Windows Server, Active Directory, Microsoft 365, virtualization, networking, storage, backup, and disaster recovery environments. Support cybersecurity operations through vulnerability management, endpoint protection, identity security, incident response coordination, and security hardening. Monitor systems, troubleshoot issues, maintain documentation, develop PowerShell automation, support upgrades, and participate in on-call rotations and disaster recovery exercises.

Lead Linux systems administration for a secure Reagan Test Range operations center. Install, configure, monitor, troubleshoot, patch, back up, and lifecycle-manage physical and virtual RHEL servers. Administer Docker, virtualization, Ansible, Git, Windows systems, and security controls in a DoD environment. Mentor administrators, document technical processes, perform root-cause analysis, and support mission-critical projects, including occasional non-duty hours and weekends.

Administer and maintain enterprise Linux environments supporting testing, validation, and operational readiness. Configure operating systems and network components, troubleshoot Tier 1 and Tier 2 incidents, resolve hardware and OS issues, develop Bash automation scripts, monitor capacity and performance, optimize system reliability, and communicate operational status and resolutions to management and customers.

Manage procurement, deployment, and lifecycle of lab and data-center infrastructure. Build, configure, monitor, and troubleshoot servers, networking, virtualization, storage, and remote-management systems. Maintain runbooks, asset records, cabling, and operational processes while partnering with engineering, IT, facilities, and network teams to ensure capacity, availability, and site readiness.

Administer and maintain Linux systems across classified networks, including installation, patching, monitoring, backups, recovery, security auditing, configuration management, and troubleshooting. Coordinate with engineering, networking, cybersecurity, desktop, and project teams; support ticketing systems; test software releases; maintain documentation; and ensure compliance with classified information-system security requirements. The role is fully onsite in Azusa, California, requires occasional travel, after-hours support, equipment handling, and an active Secret clearance with eligibility for Top Secret.

Maintain Linux and Windows servers, workstations, networks, and virtual and physical infrastructure. Provide onsite IT support and escalations, support DevOps Linux requirements, manage privileged access, and coordinate compliance with information assurance teams. The role requires administering Ubuntu systems, AWS environments, multiple networks, and Risk Management Framework requirements while collaborating with vendors, customers, management, and development teams.

Maintain Linux and Windows servers, workstations, networks, and virtual and physical infrastructure. Provide onsite IT support and escalations, support DevOps Linux requirements, administer privileged access, and manage AWS environments. Coordinate with information assurance teams on compliance and Risk Management Framework requirements. Troubleshoot issues, work with vendors and customers, and adapt infrastructure to evolving organizational needs.

Provide day-to-day infrastructure support and administration for Windows/Linux servers, Hyper-V, Azure, storage (TruNAS), backups, and SolarWinds monitoring. Perform system monitoring, patching, change management, troubleshooting, and documentation while supporting internal clients and coordinating maintenance and restorations.

Provide administration and maintenance of Windows and Linux servers, monitor infrastructure performance, support cloud/virtualized environments, apply security controls, troubleshoot systems and coordinate with technical teams.

Lead hands-on administration of hybrid Windows/Linux infrastructure supporting engineering and AI/ML workloads. Design and build VMware vSphere and GPU-accelerated compute, manage networking and secure connectivity (Entra ID/GCC High), maintain DoD/CMMC-compliant systems, support SLURM clusters, perform patching/backups/monitoring, troubleshoot lab/test hardware and software, automate tasks with scripting, and collaborate with engineering teams.

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.

Serve as escalation point for Tier 1 support; maintain and troubleshoot Windows, Linux, Solaris servers and virtual environments; administer Active Directory, DNS, Group Policy; monitor system health and backups; assist onboarding/offboarding; document issues in ticketing systems; participate in shift and on-call rotations to support mission-critical infrastructure.

Support classified government contracts as a principal Windows systems administrator: manage multi-user networks, Active Directory and Group Policy, patching, backups, monitoring, compliance (RMF/STIG/JAFAN/JSIG), incident isolation, documentation, and ticketing tools. Requires Top Secret clearance and Security+ certification; on-site in Melbourne, FL with occasional travel and physical handling of equipment.

Senior-level System Administrator providing Tier 3 support for implementation, troubleshooting, and maintenance of IT systems. Manage infrastructure, monitor client/server/storage/network devices, resolve escalations, support dispatch systems, and administer containers, clustered storage, and configuration management tooling.

Provide Tier 1 and Tier 2 support for client/server/storage/network and mobile devices; install, configure, and maintain UNIX/Linux and Windows systems; troubleshoot escalations; manage accounts, access, STE/STN compliance, and security procedures; optimize system operations, perform capacity planning, and support dispatch system hardware and software issues.

Owner of enterprise systems and automations: build and maintain Airtable bases and n8n integrations, write scripts and API/webhook integrations, administer NetSuite, monitor Snowflake pipelines, provide high-touch technical support, and document runbooks.

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.

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.