Top Systems Administrator Jobs

Owns enterprise virtualization, compute, storage, Windows and Linux systems, identity services, monitoring, backup, and disaster recovery. Diagnoses complex infrastructure problems across hypervisor, operating system, storage, and network layers; develops PowerShell, PowerCLI, and Bash automation; improves resilience and observability; supports database infrastructure; and helps introduce container workloads. The role also includes mentoring junior administrators, maintaining documentation and recovery procedures, and collaborating with network, security, database, and application teams.

Provide Tier 1 and Tier 2 cyber systems administration including domain, system, and network administration. Monitor, maintain, troubleshoot, and manage Linux/Windows OS, virtualized environments, virtual networking, and storage. Communicate status to stakeholders and support implementation, escalation, and day-to-day IT operations for classified programs.

Supports DHS CISA collaboration platforms by architecting and managing complex network, systems, and hybrid cloud infrastructures. Leads cloud provisioning, secure platform integration, compliance with FedRAMP, NIST, and DHS policies, infrastructure monitoring, performance optimization, and high-priority incident resolution. Collaborates with developers and web administrators on upgrades and data accessibility. The role is full-time and onsite in Arlington, Virginia, contingent on contract award, and requires eligibility for DHS Public Trust or EOD approval.

Supports the design, development, integration, operation, and maintenance of complex technology systems. Analyzes system requirements, processes, and methodologies; develops innovative solutions; supports enterprise modernization and system integration; contributes to strategic planning; and may lead teams while coordinating with senior management. Requires advanced systems engineering expertise, strong communication, leadership, and supervisory abilities, plus an active TS/SCI clearance with polygraph.

Provides Tier 1 and Tier 2 technical support, administering domains, systems, networks, operating systems, applications, virtual environments, storage, and infrastructure. Monitors system performance, troubleshoots issues, manages patches and configurations, supports end users, and communicates issue status across teams. The role requires on-site work in a classified environment and active TS/SCI clearance, with occasional travel.

Administers and supports organization-wide software and data systems, including user access, configurations, integrations, reporting, documentation, vendor coordination, licensing, renewals, training, and data quality. The role supports onboarding and offboarding access, security reviews, system governance, troubleshooting, process improvement, and cross-department workflows. Travel to Austin-area locations and occasional North Texas properties is required, with occasional evening or weekend work for upgrades, incidents, and maintenance.

Administer and support AWS-hosted IT infrastructure, including Drupal CMS on a LAMP stack. Configure, patch, troubleshoot, and maintain Linux systems, servers, storage, networks, mobile devices, and cloud services. Resolve complex infrastructure and integration issues, provide help desk support, optimize capacity and performance, maintain system integrity, and support system architecture design. The role requires experience with SOLR, Elasticsearch, and related search infrastructure, with Akamai and Acquia experience preferred.

Administers and optimizes Windows and Linux servers, VMware virtualization, SAN storage, backup and recovery systems, and enterprise applications. Manages Active Directory, Group Policy, networking services, access controls, patching, security controls, monitoring, incident response, documentation, and disaster recovery activities. Provides user and infrastructure support, collaborates with IT teams, participates in on-call support, and travels to the Chicagoland data center for hardware installation and maintenance.

Administer and monitor large Hadoop and cloud infrastructure environments. Perform Linux system administration, remote access, software installation, container and Kubernetes operations, infrastructure automation, and platform status monitoring. Required capabilities include Docker, Helm, Ansible, CloudFormation, Terraform, Kubernetes, and Traefik. The role supports federal government customers and requires U.S. citizenship and an active TS/SCI clearance with an agency-appropriate polygraph.

Installs, configures, administers, troubleshoots, and maintains networked systems, hardware, software, and infrastructure. Manages accounts, documentation, patches, system performance, diagnostics, virtualization, and software testing. Develops system requirements and technical solutions, evaluates new technologies, and collaborates with development and Information Assurance teams to maintain DISA compliance. The role supports multiple critical projects at a customer-site lab and provides guidance to junior personnel.

Administer and maintain Linux servers for a large RF transmission and receiving network. Responsibilities include system development, lifecycle upgrades, monitoring, patching, application design, code development, testing, and maintenance. The role requires extensive RHEL experience, familiarity with Windows and Active Directory, vulnerability and compliance monitoring, security hardening, network troubleshooting, scripting, and work with backup, virtualization, configuration management, and RMF tools.

Administers enterprise Windows and Linux compute, storage, virtual desktop, Active Directory, backup, and replication infrastructure. Processes server build requests, supports development and certification clusters, manages SAN/NAS environments, and resolves escalated helpdesk issues. The role requires working across enterprise systems, responding to infrastructure needs, communicating effectively, and following laboratory safety and organizational policies.

Owns systems administration, infrastructure implementation, networking, identity, device management, licensing, backup and disaster recovery across corporate, field, and industrial sites. The role builds IT processes, security controls, incident response, change management, help desk operations, and hardware lifecycle programs. It also coordinates managed service providers, supports complex user and site issues, mentors junior staff, and collaborates with engineering, HR, and on-site stakeholders. Approximately 25% travel is required.

Administers, monitors, maintains, and restores servers, databases, workstations, storage, KVM devices, and classified and unclassified networks. Responsibilities include patching, upgrades, troubleshooting, security assessments, backup and recovery, disaster recovery planning, documentation, ticket resolution, and end-user support. The role collaborates with vendors, stakeholders, and IT teams to improve mission-critical systems and ensure availability, security, and regulatory compliance.

Maintains physical and virtual servers, storage, operating systems, backups, networking, and infrastructure availability. Performs troubleshooting, patching, documentation, inventory, vendor coordination, system implementation, and staff training. Develops security policies, conducts audits and vulnerability assessments, manages firewalls and intrusion detection systems, monitors network activity, responds to security incidents, and trains employees in security best practices. Supports projects and recommends improvements to systems administration and cybersecurity operations.

Installs, configures, secures, and maintains enterprise workstations, servers, operating systems, networks, storage systems, and data center technologies. Provides troubleshooting, backups, restores, system upgrades, security support, hardware tracking, documentation management, and operational status reporting. Supports web pages, evaluates new technologies, coordinates upgrades, and recommends process improvements. Positions support U.S. government test-range contracts and require U.S. citizenship, a government security clearance, and a valid state-issued driver’s license.

Provides end-to-end IT support, including Windows server and desktop administration, systems integration, configuration management, troubleshooting, help desk services, account administration, imaging, hardware break/fix, software installation, and end-user training. Coordinates with security personnel to resolve information-system issues and tracks weekly service metrics. Requires a Secret clearance, DoD 8570 IAT Level II certification, and 3–5 years of IT experience.

Administer and maintain servers, operating systems, networks, security tools, applications, endpoints, backups, and data-center infrastructure. Troubleshoot systems, investigate event logs, monitor performance and hardware health, support help-desk activities, conduct system audits, and assist with server implementation and cloud integration projects. The role also supports IT initiatives, infrastructure security, and technology strategy.

Administer, troubleshoot, optimize, and secure enterprise VDI environments supporting NASIC mission users. Manage AWS WorkSpaces, Azure Virtual Desktop, VMware Horizon, and thin-client platforms; implement STIGs, patches, and DoD cybersecurity controls; collaborate on infrastructure and networking; and produce SOPs, diagrams, design documentation, and whitepapers. The role requires active Top Secret/SCI clearance, IAT Level II certification, and hands-on VDI administration experience.

Administer and maintain Windows and Linux servers, virtualization platforms, Active Directory, storage, backups, and enterprise IT infrastructure. Support LAN/WAN networks, telecommunications, systems integration, troubleshooting, patching, hardening, and configuration management. Perform cybersecurity operations, vulnerability mitigation, compliance assessments, and intrusion detection support. Develop technical requirements, evaluate infrastructure solutions, prepare procurement specifications, coordinate technical activities, and mentor junior personnel while improving IT reliability and security.

Administer Windows servers, workstations, Active Directory, VMware virtualization, networking, backups, security, and infrastructure systems for approximately 800 users. Troubleshoot hardware, software, connectivity, and end-user issues; manage access and configurations; monitor system health; document procedures; support infrastructure improvements; and help establish IT standards. The role is hands-on with opportunities to mentor team members and develop toward broader leadership responsibilities.

Provide Tier I-III Windows systems administration for a small office: maintain Windows Server 2016, Exchange 2016, Windows 10, Active Directory, WSUS updates, imaging, account management, VTC support, LAN/WAN and backup support. Support DISA networks, update documentation, perform hardware/software upkeep, and respond to outages. Onsite in Arlington; requires TS/SCI clearance and Security+ certification.

Senior Systems Administrator responsible for MECM (SCCM) package creation and deployment, OS installation/configuration/patching, workstation imaging, and PowerShell scripting. Provide Tier 1-3 support, AD administration, STIG compliance, and remediation coordination with Information Assurance. Develop automation, troubleshoot enterprise client/server systems, and work closely with clients on technical and requirements analysis. Onsite role supporting US Army INSCOM with TS/SCI clearance requirements.

Provide advanced desktop and systems administration for an intelligence customer: troubleshoot hardware/software, perform OS and software installs/upgrades, manage backups and image management, maintain VDI/Citrix environments, audit compliance, train users, and lead complex recoveries and projects with limited oversight. Onsite role requiring cleared personnel.

Manage and maintain server and OS infrastructure (Windows/Linux), enforce DISA security policies, deploy updates via MECM, script automation (PowerShell/VBScript/DSC), monitor services (SolarWinds), support AD/DHCP/DNS/print services, provide documentation, user training, and lead junior staff. Requires TS/SCI clearance and on-call availability.