Top Systems Administrator Jobs

Maintain and support on-premises and cloud HPC/Linux systems. Install, configure, patch, and upgrade OS, Kubernetes, and M&S applications. Develop automation (Ansible, GitLab CI/CD), troubleshoot outages and hardware/A/V issues, monitor backups, document procedures, and recommend system improvements. May supervise staff.

Maintain and improve Windows, Exchange, and SQL servers in virtualized/clustered environments. Administer Active Directory, VMware (ESX/vSphere/Horizon), enterprise storage, backups, and disaster recovery. Monitor performance, troubleshoot issues, support applications, ensure cybersecurity best practices, document systems, and collaborate with IT leadership and clinical teams across multiple locations. Participate in upgrades, DR exercises, and occasional after-hours work.

Manage and maintain on-premises and cloud infrastructure, including Windows/Linux servers, VMware virtualization, Microsoft 365/Entra ID, storage and backup. Drive security, compliance (GLBA), disaster recovery, automation (PowerShell), documentation, and provide Tier 3 support while collaborating with service desk, network, security, and vendors.

Manage and maintain enterprise IT infrastructure; provide Tier I and Tier II support; configure and administer UNIX and Windows systems; install and maintain Cisco routers/switches; troubleshoot servers, storage, network and mobile devices; support dispatch systems; optimize operations and capacity planning; analyze and resolve complex integration issues and support system design and SOA interdependencies.

Provide frontline IT support via phone, email, chat, and ServiceNow tickets. Troubleshoot basic hardware, software, and network issues; install and update software; assist with account/password resets and peripherals; maintain asset inventory and documentation; escalate complex issues; contribute to knowledge base and mentor new hires. On-site in Annapolis Junction with a Friday–Monday 12pm–10pm schedule. Requires an active security clearance with FS polygraph and a technical bachelor's degree (or 10 years system administration experience as substitute).

Operate and improve the Data Science Institute's computing infrastructure with emphasis on Linux and HPC. Administer clusters, storage, networking, configuration management, containerization, endpoint and AV systems; lead projects, mentor junior staff, support security, backups, and research workflows.

Administer and maintain enterprise servers, virtualization, and storage environments (VMware/Proxmox, SAN/NAS/object storage). Monitor performance/capacity, provision and manage physical and virtual servers, perform upgrades/migrations, and maintain backup and disaster recovery. Apply security best practices, patching, and system hardening. Troubleshoot complex infrastructure issues and collaborate with engineering, security, networking, and application teams to ensure availability and resiliency.

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.

Administer and maintain enterprise servers, virtual environments, and infrastructure for a mission-critical DOD platform. Perform system administration, monitoring, patching, backups, troubleshooting, performance tuning, and documentation. Collaborate with cybersecurity, engineers, help desk, and government stakeholders. Support upgrades, disaster recovery, after-hours maintenance, and on-call duties while ensuring security and availability of systems.

Operate and secure Azure Government cloud environments including VMs, AVD, AKS, and ACR. Use IaC (ARM/Bicep, Terraform) and CI/CD pipelines to deploy resources, build STIG-compliant images, support RMF/ATO sustainment, and implement Azure security controls while collaborating with development, security, and operations teams.

Provide Tier 1 and Tier 2 IT support and systems administration for Microsoft 365, VDI/EUC, servers, and business applications. Perform routine server maintenance, backups, monitoring, account provisioning, and basic network tasks. Troubleshoot infrastructure and application issues, collaborate with security and engineering teams, maintain IT documentation, and recommend improvements and automation to increase reliability and user productivity.

Perform Linux systems administration on large classified government contracts, supporting multi-user and multi-network environments. Maintain VMs, apply security patches, manage accounts and permissions, document procedures, prepare security documentation, coordinate with engineers/vendors, and adhere to strict information security policies while reporting project status and troubleshooting independently.

Perform Linux systems administration on classified DoD contracts including RHEL server administration, VMware/virtualization, account and permission management, patching, monitoring, security auditing, and coordination with engineers, vendors, and customers. Prepare security documentation, follow strict ISSM/IA processes, and support multiple networks at Buckley Space Force Base with occasional travel.

Provide DevOps and systems administration for Windows-based web hosting in AWS: automate build/configuration, patching, troubleshooting, maintain IIS/WordPress/RDS environments, monitor reliability, support migrations, and maintain technical documentation and configuration management.

Provide Tier 2 Windows system administration and technical support: troubleshoot and resolve issues, document solutions, collaborate for advanced fixes, participate in on-call/after-hours support, and maintain enterprise troubleshooting processes while meeting DoD 8140 IAT II and clearance requirements.

Maintain and administer Windows server environments and network infrastructure across multiple offices. Responsibilities include Active Directory, Hyper-V, file and storage administration, Fortinet firewall management, MECM/SCCM deployment, PowerShell automation, system imaging, documentation, and NIST 800-171 compliance support.

Provide system administration, O&M, and security management for a complex, geographically distributed network. Install/configure applications and servers, patch and harden systems, manage virtualization, handle troubleshooting, maintain documentation, and support air-gapped enclaves and off-site locations.

Configure, image, install, test, maintain, and manage distributed computing kits, client systems, and hardware. Support Windows, Linux/Unix, Android, and iOS environments; manage tickets, documentation, inventories, asset movement, and obsolete equipment disposition. Maintain system configurations, assist with information systems operations, and ensure accurate, timely service delivery for a SOCOM customer. The role requires an active TS/SCI clearance, U.S. citizenship, and onsite work at Fort Bragg.

Administers distributed computing operations and deployable remote kits for a SOCOM customer. Installs, images, configures, tests, maintains, and updates PCs, laptops, and operating systems. Manages system documentation, ticket queues, hardware inventories, asset movement, storage, and disposition. Supports Windows, Linux/Unix, Android, and iOS environments, server virtualization, and configuration management. Requires TS/SCI clearance, U.S. citizenship, and 3+ years of related experience.

Administer and optimize franchise royalty platforms, configure royalty structures, reconcile data across ERP/CRM/POS, develop dashboards and recurring reports, analyze franchisee data for trends and risks, troubleshoot systems, support updates/testing, automate reporting workflows, document processes, and provide training and vendor liaison support.

Maintain, configure, secure, and support an organization's computer networks, servers, and software. Perform system administration tasks, support program operations, and use Microsoft Office tools to document and present findings. Work requires supporting DoD/IC programs under required security clearance.

Administer and maintain automated and computerized systems across cGMP biopharmaceutical manufacturing: manage configurations, access, backups, integrations (LIMS/Historian), change control, validation (SAT/FAT), documentation, investigations, end-user support, and continuous improvement to ensure systems remain qualified and compliant throughout their lifecycle.

The Senior Systems Administrator leads the design, implementation, and maintenance of IT infrastructure, ensuring security and scalability. Responsibilities include system upgrades, technical support, mentoring staff, and managing enterprise IT environments.

As a Cyber Security Specialist or Systems Administrator, you'll support enterprise information systems, oversee security protocols, monitor vulnerabilities, and maintain user accounts in a collaborative team environment.

Manage, secure, and maintain enterprise VMware virtual infrastructure and Windows Server services for DoD missions. Design and deploy clusters, storage, networking, and hardened STIG-compliant configurations. Collaborate with systems, network, and cyber teams to troubleshoot, audit, and ensure high availability, performance tuning, and regulatory compliance for critical government environments.