Top Systems Administrator Jobs

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, 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 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 on-site systems administration and functional support for MDA contracting offices, managing DoD contract writing systems (ECWM/ORBIT/PIEE/WAWF), running SQL scripts, maintaining security models, administering user accounts, training staff, and producing SOPs and help documentation to ensure secure, compliant procurement operations.

Administer and engineer the company’s Microsoft-centric technology estate across Azure, Windows Server, Microsoft 365, Entra ID, and Intune. Manage identity, endpoints, infrastructure, security, compliance, monitoring, and hybrid connectivity. Build PowerShell automation and infrastructure as code to reduce manual work, maintain operational health, and support production systems. The role also requires documentation, independent ownership, change judgment, and communication with technical and non-technical stakeholders.

Administers and supports enterprise server, identity, endpoint, cloud, backup, and Linux infrastructure. Responsibilities include Windows Server, Active Directory, Entra ID, Microsoft 365, Intune, Hyper-V, Azure, AWS, monitoring, patching, vulnerability remediation, automation, documentation, change management, hardware installation, and escalated incident response. The role supports regulated systems containing protected health information, participates in on-call rotation, and works in a hybrid Coppell, Texas environment.

Provides on-site systems administration for a GEOINT exploitation environment. Responsibilities include maintaining servers and systems, managing accounts and documentation, supporting VDI endpoints and virtual machines, packaging and automating software deployments, troubleshooting hardware and software issues, developing testing strategies, supporting backups and recovery, training users, and mentoring junior staff. The role requires collaboration across missions and rapid response to maintain operational uptime and production readiness.

Manage and optimize ServiceNow DEV/TEST/PROD instances, implement CAC authentication for IL-4, configure modules (SPM, ITAM, WSD, CMDB, Service Catalog), perform performance tuning, cloning, backups, reporting, user training, and ensure DoD/Air Force cybersecurity compliance while coordinating changes through platform owners.

Provide systems administration and operational support for intelligence training applications and infrastructure (Windows/Unix/Linux, VDI, VMware, NetApp). Act as Cyber Security Liaison for ticketing systems, manage accounts/LMS, build and deploy baselines/images, perform backups/restores, and deliver classroom/instructor support. Maintain documentation, SOPs, and adhere to DoD cybersecurity requirements while supporting NIPR/SIPR and classified environments.

Administer and optimize enterprise Solaris and Linux systems, storage, backup, patching, package management, vulnerability remediation, hardening, and compliance processes. Configure IBM Enterprise Storage and Veritas NetBackup, manage Nessus scans, troubleshoot performance issues, support infrastructure upgrades and incident response, and maintain technical documentation. Requires active TS/SCI with Polygraph clearance, Security+ certification, and at least three years of Solaris and Linux systems administration experience.

Serve as a technical leader and SME for Atlassian applications, designing and maintaining secure integrations across SaaS, CRM, ERP, billing, and internal systems. Build REST, GraphQL, and webhook integrations; automate workflows; implement monitoring and alerting; manage data transformations; document solutions; and support complex Jira and Confluence configurations and upgrades in clustered Linux environments. Partner with stakeholders, troubleshoot issues, lead projects, and mentor team members.

Configure, deploy, and maintain virtual and physical servers, workstations, and network infrastructure for the MACC-TTE. Integrate and operate cohesive virtual/physical environments, implement IA controls, perform testing and reset, automate provisioning and orchestration (Ansible/Python), and support diverse devices including ICS/SCADA, IoT, and RF.

Provides on-site systems, network, helpdesk, cybersecurity compliance, web application, telecommunications, VTC, asset, records, and administrative support for HAF/A10 at the Pentagon. Responsibilities include troubleshooting IT equipment, administering systems and access controls, managing SharePoint and websites, supporting VTC and telephone systems, maintaining IT asset records, coordinating cybersecurity requirements, and tracking organizational taskings.

Provides on-site IT support, systems administration, hardware and software troubleshooting, network and server maintenance, endpoint security, helpdesk ticket resolution, inventory management, vendor coordination, and location setup. Supports Windows and Mac users, infrastructure, phones, mobile devices, AV equipment, and security surveillance. Travels up to 60% to Carvana locations, participates in hardware refresh projects and on-call rotations, and documents solutions in Jira.

Support complex national security space system acquisitions through systems integration, architecture definition, requirements engineering, MBSE, testing, validation, risk management, configuration management, and schedule management. Translate formal requirements into agile user stories and statements of work, develop performance metrics, facilitate stakeholder engagement across intelligence communities, and support digital and data engineering practices for satellite ground and enterprise systems.

Maintains and configures Workday Financials, including security, reporting, integrations, troubleshooting, release support, and operational procedures. Analyzes requirements, tests solutions, resolves complex issues, supports internal teams and vendors, and participates in special projects. The role requires strong communication, organization, problem-solving, customer service, and financial-report interpretation skills. A bachelor’s degree or two years of relevant Workday experience is required; Workday Pro certification is preferred.

Administer AWS cloud infrastructure, virtual machines, and Windows or Linux systems in an onsite defense intelligence environment. Maintain secure RMF/STIG-compliant systems, support virtualization, and potentially automate processes with Ansible, containers, scripting, and DevOps tooling. The role requires an active DoD Top Secret/SCI clearance and IAT Level II certification, with approximately 10% travel.

Provide systems administration and account-management support for Distributed Ground System operations. Provision and maintain user accounts with SailPoint, troubleshoot access and system issues, support upgrades, perform health checks across infrastructure, document configurations in SharePoint, collaborate with security teams, and guide Tier 1 and Tier 2 support staff. The role operates on rotating four-day, 10-hour shifts and requires an active TS/SCI clearance.

Manages and maintains IT systems, networks, workstations, servers, applications, and infrastructure across multiple sites. Provides remote and onsite troubleshooting for Windows, network, operating system, application, Azure, and Active Directory issues. Installs and administers Windows and iOS systems, supports virtualization and cloud environments, and explains technical concepts to nontechnical users. The role requires strong customer service, communication, collaboration, independent judgment, and regular local travel, with occasional overnight travel.

Administer classified Windows workstations, servers, Active Directory, and Open Storage Area infrastructure. Troubleshoot user and system issues, manage accounts, patch systems, monitor health and audit logs, conduct Nessus vulnerability scans, perform SCAP/STIG assessments, remediate findings, maintain security baselines and inventories, support DCSA inspections, and coordinate compliant media transfers. The role also supports continuous monitoring, security impact analyses, configuration control, and escalation of security incidents.

Administer and troubleshoot IBM z/OS network systems and connectivity, including VTAM, TCP/IP, TN3270, FTP, Policy Agent, and SMTP. Manage TSO, ISPF, JCL, VSAM, catalogs, and JES2 operations. Develop automation scripts and monitoring or reporting tools, support MQ, DB2, CICS, file transmission, printing, and email infrastructure, and collaborate with enterprise network and security teams.

Administer and support IBM z/OS environments, including installations, upgrades, maintenance, lifecycle management, and complex troubleshooting. Use SMP/E for software maintenance, PTFs, APARs, and HOLDDATA processing. Develop REXX automation and administer z/OSMF services and workflows. Monitor performance, availability, capacity, and system health; support upgrades, migrations, disaster recovery testing, production operations, and on-call activities. Collaborate across infrastructure teams, maintain technical documentation, and mentor other mainframe administrators.

Administer and maintain Windows/Linux servers, AD, IAM, M365, Azure and AWS cloud services, virtualization, SAN/storage, SIEM, MDM, email gateways, backups and monitoring. Perform patching, troubleshooting, scripting/GPOs, documentation, security/compliance (CJIS), on-call rotation, ticket queue support, and participate in ISD projects.

Administer and troubleshoot Windows Server 2012, SLES/RHEL Linux, and VMware ESX environments. Configure and maintain 1Gb/10Gb LANs and Layer 2/3 Ethernet devices. Support PC and server architecture, perform setup, configuration, and network troubleshooting. Collaborate with team; requires 3-5 years of applicable experience.

Lead systems administration across multiple classified networks: design, build, secure, and maintain Windows/Linux servers, virtualization (VMware), storage, networking, access management (AD/DNS), backups/disaster recovery, and configuration management. Provide technical leadership, troubleshooting, scripting automation (PowerShell/Unix Shell), STIG-based hardening, documentation, and customer briefings in SCI/SAP environments while holding active Top-Secret/SCI and meeting DoD certification requirements.