Top Systems Administrator Jobs

Designs, builds, tests, deploys, and maintains scalable systems supporting mission needs. Performs Windows systems administration, automation, documentation, monitoring, troubleshooting, hardening, patch management, and Agile development and operations activities. Evaluates complex technical alternatives, resolves multi-domain system issues, and coordinates with customer and team stakeholders. The role requires extensive Windows Server, Active Directory, DNS, PowerShell, scripting, security hardening, and Agile experience.

Provides Tier I and Tier II support for IT infrastructure, including client/server, storage, network, and mobile systems. Performs monitoring, troubleshooting, escalation, system configuration, operating system installation, capacity planning, and performance optimization. Manages UNIX and Windows environments, maintains system integrity, resolves hardware and software issues, and communicates status to management and internal customers. The role requires five years of systems administration experience and a TS/SCI clearance with polygraph.

Supports implementation, maintenance, monitoring, troubleshooting, and optimization of enterprise IT systems. Provides Tier I and Tier II support, manages UNIX and Windows systems, configures network components, supports Cisco routers and switches, resolves server and software integration issues, and assists with system architecture and capacity planning. Requires extensive systems administration experience and a TS/SCI clearance with polygraph.

Provides system administration and IT infrastructure support across UNIX, Windows, client/server, storage, network, and mobile environments. Responsibilities include monitoring, troubleshooting, Tier 1 and Tier 2 escalation support, operating system configuration, network component management, dispatch coordination, and system reliability improvements. Requires extensive systems administration experience, technical education, IAM certification, U.S. citizenship, and an active TS/SCI clearance with polygraph.

Administer and maintain the ECGS enterprise communications environment and supporting Windows, SQL Server, IIS, networking, and clustered infrastructure. Configure messaging profiles and routing, troubleshoot transmission failures, monitor distributed applications, execute failover procedures, maintain documentation, and support OS hardening, patching, vulnerability mitigation, and IAVA/STIG compliance in a secure DoD environment.

Administer and support the ECGS application suite and infrastructure in a secure DoD environment. Responsibilities include configuring messaging tools, troubleshooting Windows, SQL Server, and IIS dependencies, monitoring systems and network performance, resolving routing and transmission failures, executing cluster failovers, maintaining documentation, and supporting OS hardening, patching, IAVA, and STIG compliance. The position is fully onsite at the Pentagon or designated NCR facilities.

Provides systems administration and technical support for Army mission training environments. Maintains system health, patches, backups, network devices, operating systems, databases, and security configurations. Troubleshoots hardware and software issues, integrates LVC systems, documents configurations, supports training exercises, prepares technical reports, and interfaces with customers. Requires five or more years of experience, Security+ CE certification, an active Secret clearance, and the ability to obtain Top Secret/SCI clearance. This is an onsite Fort Bragg role.

Provides enterprise IT support and junior systems administration across Windows, macOS, and Linux environments. Responsibilities include troubleshooting hardware and software, administering Active Directory and Entra ID, managing endpoints and IT assets, supporting conference room technology, resolving service tickets, documenting procedures, and collaborating with infrastructure, network, and security teams. The role also includes occasional after-hours or on-call support.

Administer and support SPMS hospitality applications across shipboard and shoreside environments. Responsibilities include configuration, user access, upgrades, patches, Level 2/3 production support, database queries, reporting, integrations, troubleshooting, data validation, security reviews, compliance, testing, deployments, and operational readiness in a 24/7 environment.

Installs, configures, secures, and supports enterprise operating systems, workstations, servers, networks, and storage environments. Monitors system performance and logs, manages backups, restores, access controls, upgrades, hardware inventories, support contracts, and configuration/document management systems. Designs web pages, troubleshoots LAN and infrastructure issues, recommends technology improvements, and coordinates transitions across development, testing, production, and documentation environments. Requires extensive systems administration experience, U.S. citizenship, a driver's license, and ability to obtain and maintain a government security clearance.

Owns the reliability, security, and performance of on-premises, virtualized, and cloud infrastructure. Responsibilities include administering Windows and Linux servers, managing virtualization and identity platforms, maintaining backup and disaster recovery plans, monitoring systems, automating infrastructure tasks, supporting vulnerability remediation, leading migrations and upgrades, documenting systems, mentoring administrators, and serving as the senior escalation point during incidents and maintenance windows.

Support and maintain Windows and RHEL servers in AWS, assisting with provisioning, backups, patching, STIG application, troubleshooting, RBAC/AD administration, scripting (Bash/PowerShell), monitoring, and compliance documentation while collaborating with cloud and cyber teams. On-site in Crystal City, VA.

Administers the bank’s IT infrastructure, including servers, switches, endpoints, Active Directory, email, backups, VPNs, firewalls, print systems, and phone systems. Provides Tier 2 helpdesk escalation, patching, endpoint remediation, user onboarding and offboarding, automation, asset tracking, backup rotation, ISP coordination, and support for new locations. The role also assists with IT projects, vendor coordination, and banking-center physical security hardware while maintaining required compliance knowledge.

Leads onsite cybersecurity operations for federal facility and control systems. Responsibilities include patching, hardening, monitoring, vulnerability management, RMF documentation, system inventories, compliance, ATO readiness, and coordination with government cybersecurity teams, facility personnel, OEM vendors, and stakeholders. Supervises two RMF Specialists, mentors staff, supports risk assessments, and leads cyber phase-in and transition activities.

Provides Linux systems administration across classified and unclassified Navy networks. Responsibilities include RHEL maintenance, patching, hardening, vulnerability remediation, virtualization, automation, backup and disaster recovery, incident response, documentation, cybersecurity compliance, and support for mission systems. The role requires physical field work and periodic at-sea duty at the Pacific Missile Range Facility.

Administers enterprise IT systems while serving as Information System Security Manager. Responsibilities include implementing NISPOM, DAAPM, and NIST security requirements; managing system security plans, compliance artifacts, changes, monitoring, incident response, COMSEC inventory, physical and personnel security, and end-user support. The role collaborates with facility security and IT teams and may require evening or weekend work.

Administer Windows infrastructure in Azure and Citrix DaaS environments across commercial and U.S. Government systems. Responsibilities include managing Windows Server, Active Directory, Group Policy, Entra ID, Azure resources, VDI, backups, identity, security, automation, and high availability. The role also supports modernization, troubleshooting, compliance evidence, documentation, and third-level support. PowerShell, Bicep, Azure Automation, Citrix NetScaler, and StoreFront are used to improve reliability, security, and operational efficiency.

Administer enterprise NetApp storage, VMware virtualization, cloud infrastructure, PKI, LDAP, and Linux/Unix systems. Develop Ansible and Bash automation for patching, configuration management, and maintenance. Support accreditation, compliance validation, monitoring, incident response, maintenance windows, documentation, and root-cause analysis. The role also requires operating as a Data Transfer Officer and collaborating with cross-functional teams.

Provides implementation, troubleshooting, maintenance, monitoring, and administration of enterprise IT infrastructure. Supports client/server, storage, network, and mobile systems; resolves Tier I and Tier II issues; manages Linux and Windows operating systems; configures network components; supports Cisco routers and switches; and communicates issue status to management and internal customers. The role requires 15 years of relevant experience, a technical bachelor’s degree or equivalent experience, active TS/SCI clearance, and an active polygraph.

Provides Tier I and Tier II support for client/server, storage, network, and mobile systems. Configures and manages UNIX and Windows operating systems, installs software, troubleshoots issues, maintains system integrity, and configures network components. Monitors operations, escalates problems, communicates status to stakeholders, optimizes resource utilization, and performs capacity planning to improve system reliability and performance.

Provides senior systems administration, integration, and sustainment for U.S. Space Command mission systems. Responsibilities include managing Windows enterprise environments, virtualization, VDI, servers, storage, backups, patches, databases, networking, load balancing, and specialized mission applications. The role supports system integration and testing, troubleshooting, lifecycle maintenance, cybersecurity hardening, DISA STIG compliance, RMF activities, technical design, and coordination with engineering teams, government stakeholders, OEMs, and contractors.

Designs, deploys, and provides advanced support for enterprise endpoint management using MECM and Intune. Responsibilities include Windows and third-party application packaging, patching, vulnerability remediation, PowerShell automation, compliance reporting, networking troubleshooting, and large-scale incident resolution. Partners with security, networking, architecture, and support teams; mentors lower-level engineers; maintains configuration and scripts using version control; and improves endpoint security, reliability, and user experience across distributed physical and virtual environments.

Designs, deploys, and supports endpoint management solutions across distributed environments using MECM and Intune. Responsibilities include application packaging, third-party patching, vulnerability remediation, PowerShell automation, compliance reporting, networking troubleshooting, incident escalation, and configuration management. The role partners with security, networking, architecture, and support teams to maintain secure and reliable endpoints, while mentoring lower-level engineers and documenting operational procedures.

Administer and troubleshoot Windows and Linux servers, workstations, networks, authentication, file sharing, VMware infrastructure, Exchange, NetApp storage, and Windows patching systems. Perform virtualization lifecycle management, classified-system hardening, documentation, backup operations, and RMF audit preparation. Collaborate with security personnel and IT stakeholders to maintain compliant, secure, and reliable lab infrastructure in a fully onsite environment.

Provides senior Linux systems administration for secure national security environments. Responsibilities include supporting system and mission architecture, managing server hardware and software integration, resolving complex technical issues, assessing system vulnerabilities, and supporting enterprise security services. Requires Linux, Ubuntu, RHEL8, SOA knowledge, DOD 8570 IAT Level 2 compliance, shiftwork flexibility, and an active TS/SCI clearance with polygraph.