Top Systems Administrator Jobs

Provide Tier I systems administration and IT service desk support including first-level troubleshooting, hardware/network monitoring, account and OS management, ticketing/ITSM documentation, escalate to Tier 2/3, perform hardware inspections/replacements, and work rotating 12-hour Panama schedule supporting privileged user operations under strict security policies.

Administer and sustain enterprise Active Directory forests, domains, trusts, replication, GPOs, DNS, and authentication services. Provide Tier 2/3 troubleshooting, domain controller deployments, schema updates, AD health monitoring, patching and STIG-based compliance, documentation, and cross-team collaboration to support secure identity services for mission systems.

Administer, secure, and sustain enterprise virtual server environments (VMware, Hyper-V). Manage vCenter, hypervisors, VM lifecycle, templates, patching, STIG compliance, ATO documentation, performance monitoring, troubleshooting, and provisioning workflows to ensure stability and secure operations across multiple networks/enclaves.

Operate, maintain, and secure enterprise storage platforms (SAN, NAS, object, backup/replication) across multi-network and cloud-connected environments. Monitor performance, manage provisioning and access controls, support backup/DR, apply patches/firmware, remediate vulnerabilities, troubleshoot integrations, and coordinate with engineering and cybersecurity teams to ensure high availability and compliance.

Provide first-line IT support and user lifecycle management, design scalable corporate IT infrastructure, troubleshoot systems (Linux/Windows/Mac), manage networks and SaaS integrations, create IT processes, and escalate complex issues to senior staff.

Lead design and implement secure, scalable Windows and Linux server environments. Lead cross-platform deployments, build automation frameworks, enforce OS-level security and compliance, mentor junior administrators, and collaborate with infrastructure, security, and application teams on enterprise initiatives.

Lead design, implementation, administration, and troubleshooting of enterprise network and computer systems. Support WAN/BAN/LAN/Wi‑Fi, routers, switches, and firewalls. Drive modernization, patching, firmware updates, STIG/system hardening, vulnerability remediation, and compliance activities. Maintain documentation, support audits, and collaborate with engineers and stakeholders.

The Systems Administrator will manage and support HPC services, system operations, and IT problem resolution for the Intelligence Community, ensuring optimal system performance and user support.

As a Systems Administrator Level 1, you will provide HPC services, troubleshoot IT systems, and support computer/network security operations.

The Systems Administrator role involves Linux system administration, configuring servers, monitoring network resources, implementing security compliance, and documenting changes to inventory.

The Systems Administrator will manage HPC services, support system transition operations, perform troubleshooting and maintenance, manage IT system configurations, and assist users with IT systems.

The IT Engineer will provide Tier II support for maintaining a large enterprise environment, troubleshoot Windows and Linux applications, and manage user experience.

The IT Engineer will provide Tier II support, manage Windows and Linux systems, troubleshoot applications, and communicate with teams to enhance user experience.

As a Systems Administrator for GRVTY, you will manage Linux systems, maintain compliance, troubleshoot issues, and support cloud infrastructure, critical for national security.

The Systems Administrator supports users, manages IT infrastructure, handles hardware/software deployments, troubleshoots issues, and assists in cybersecurity incident responses.

Operate and maintain secure Windows and virtualized infrastructure for DoD/Space programs. Administer AD, endpoints, VMware, and cloud workloads (AWS/Azure); implement and sustain CMMC/NIST controls; produce technical evidence; remediate findings; troubleshoot hardware/software; maintain documentation, assets, and change records in a compliance-ready environment.

Provide L2/L3 administration and operational support for Windows, Active Directory, and Azure environments. Manage VMs, VNets/NSGs, backups, monitoring, hybrid identity (Entra Connect), patching, backup/restore, log analysis, and collaborate with networking, security, application, and database teams. Document configurations and follow lead architect standards.

Provide on-site systems administration and user-facing IT support across desktops, servers, networks, AV, and security. Travel frequently to deploy and support remote locations, troubleshoot hardware/software/IP telephony/AV, maintain inventory and documentation (Jira), monitor systems, coordinate vendors, and participate in on-call rotation.

Lead Windows systems administration for classified government contracts, architecting and operating Windows domain environments, Active Directory, GPOs, VMware and SAN storage. Provide technical leadership, vendor engagement, security-compliant backup/recovery, testing, automation, and mentoring. Ensure adherence to RMF/STIG/NISPOM frameworks, support assessments and A&A, and perform travel and on-site classified work.

Provide Level 2 network monitoring, advanced troubleshooting, incident remediation, and configuration support in a 24×7 NOC. Own escalated tickets, document root causes, produce reports, maintain network documentation, and create runbooks for Level 1 training.

Provide Level 2 Windows systems administration and troubleshooting for development, test, and production servers. Perform patching, re-imaging, GPO configuration, OS hardening, software/agent management, monitoring, incident remediation, root cause analysis, reporting, documentation, and create runbooks to train Level 1 analysts. Support 24×7 operations on rotating shifts.

Administer and maintain Linux/Unix development, test, and production servers including imaging, patching, package management, and shell-level maintenance. Monitor systems, troubleshoot complex OS/service/connectivity issues, own Level 2 incidents through resolution and root-cause analysis, produce operational reports, maintain documentation/configuration data, create runbooks, and train Level 1 analysts. Support 24x7 operations across rotating shifts and ensure compliance with export-control and authorization requirements.

Administer, configure, and maintain Windows and Linux systems, networks, and hardware for DoD/IC environments. Build bare-metal systems, enforce RMF security policies, monitor for intrusions, perform backups and recovery, manage authentication services, document systems, and support displays and video distribution. Support TS/SCI clearance requirements and automation/scripting tasks.

Support ARL IT by documenting and streamlining processes, updating SOPs and training materials, assisting ticket queues, and collaborating with technical teams to maintain secure, compliant computing environments.

Maintain and troubleshoot Linux-based HPC systems, cloud tooling, Kubernetes platforms, and M&S applications; execute automation and GitLab pipelines; perform backups, patches, monitoring, and system documentation; respond to outages and recommend infrastructure improvements.