Top Systems Administrator Jobs

Supports and administers Microsoft 365, Exchange Online, Outlook, Teams, SharePoint, and related collaboration platforms. Responsibilities include account and mailbox administration, permissions management, troubleshooting email and access issues, ticket resolution, documentation, system maintenance, upgrades, migrations, and platform rollouts. The role also supports hybrid Exchange environments, partners with IT teams on root-cause resolution, participates in on-call rotations, and provides occasional onsite support in Newport News.

Administer and maintain Linux and Windows systems across physical and virtualized environments supporting classified defense research. Responsibilities include managing storage, networks, firewalls, Active Directory, Group Policy, monitoring, automation, patching, troubleshooting, SOPs, and production and development environments. The role requires active Top Secret/SCI with polygraph clearance, on-site work in Woburn, Massachusetts, and occasional after-hours maintenance support.

Provides field-based IT, networking, PC, connectivity, and industrial control-system support. Responsibilities include monitoring tickets, configuring routers and firewalls, maintaining Fiber Optic and Starlink connectivity, troubleshooting PLC and SCADA integrations, supporting system availability and security, documenting infrastructure, updating equipment, and training field personnel. The role collaborates with engineers and operations teams to resolve technical issues across offices and job sites.

Provides end-user help desk support and maintains the Newport office’s workstations, servers, networking equipment, applications, and Microsoft 365 environment. Administers accounts, permissions, security controls, patching, software deployment, onboarding, offboarding, documentation, and ITSM systems. Owns technical projects, improves business and IT processes, and escalates security incidents. Requires occasional travel to San Diego and offers growth opportunities in cybersecurity, Azure, automation, and integrations.

Supports engineering and information systems operations through scripting, debugging, troubleshooting, software testing, system architecture research, and special projects. Collaborates with development teams and senior administrators while learning system administration methodologies. The internship requires enrollment in a technical degree program, programming or scripting proficiency, Windows or Linux administration experience, U.S. citizenship, and eligibility to obtain a Top Secret clearance.

Maintains computer systems, databases, applications, endpoints, and user access. Provides on-site and remote technical support, troubleshoots hardware, software, network, and security issues, manages IT assets, monitors system performance, maintains documentation, supports backup and recovery, and participates in on-call coverage. The role also assists with technology implementations and provides guidance to junior team members.

Administer and maintain Linux, Windows, VMware, networking, hardware, software, and system configurations. Implement infrastructure, security, compliance, disaster recovery, and business continuity solutions. Monitor performance, manage accounts and access, apply patches, install packages, perform backups, and troubleshoot user and server issues. Provide project assistance, documentation, and customer support in a hybrid research computing environment.

Provision, configure, and maintain highly available enterprise, cloud, hybrid-cloud, and air-gapped systems. Lead infrastructure automation using Terraform, Ansible, CI/CD, and containerization tools while improving reliability, security, monitoring, backup, and disaster recovery. Manage complex networking, identity, cross-domain, database, and server environments. Optimize cloud and system performance, strengthen security controls, and mentor systems administration teams. Support regulated and defense-oriented infrastructure with secure architecture, accreditation, and operational standardization.

Leads enterprise systems architecture, infrastructure modernization, and zero-trust implementation across air-gapped, hybrid-cloud, and multi-enclave environments. Designs and optimizes highly available infrastructure, drives Infrastructure as Code and configuration management, and establishes disaster recovery, compliance automation, governance, and operational resilience practices. Provides technical leadership for cloud, networking, containerization, security accreditation, monitoring, identity services, databases, and DevSecOps while guiding infrastructure teams and optimizing performance, scalability, security, and cost.

Administers and improves on-premises and cloud infrastructure across corporate, research, laboratory, manufacturing, and regulated environments. Leads infrastructure designs, migrations, upgrades, deployments, patching, monitoring, vulnerability remediation, backup and disaster recovery activities. Troubleshoots complex systems issues, develops automation, maintains technical documentation, coordinates vendors, and partners with security, quality, application, and business teams to deliver reliable, compliant infrastructure solutions.

Manage and optimize Workday Learning, including content configuration, enrollments, reporting, troubleshooting, governance, integrations, and compliance. Develop dashboards, data extracts, and Power Automate workflows while supporting stakeholders and resolving system and data issues. Lead learning system implementations, migrations, vendor integrations, audits, and cross-functional projects from requirements through deployment. Recommend technology enhancements, automation opportunities, and future-state learning architecture.

Administer and support enterprise PLM, ERP, and MES applications across engineering, manufacturing, and business teams. Responsibilities include user access management, ticket resolution, root-cause analysis, system configuration, documentation, training, license auditing, automation, user acceptance testing, release validation, and troubleshooting data flows between systems.

Maintains, administers, documents, and supports enterprise IT systems, including Linux and Windows environments, VMware, hardware, and software. Resolves trouble tickets and provides helpdesk support for IT questions and problems. Develops system documentation, product guides, standard operating procedures, work logs, and ticket records. The role is fully onsite, requires eight years of relevant experience, and supports federal government operations under an active TS/SCI clearance with polygraph.

Maintains and supports software systems for Department of Defense clients, including Windows patching, troubleshooting, SCAP scans, STIG development, compliance maintenance, client implementation, documentation, and application testing. The role provides phone and email support, requires collaboration with technical teams, and involves approximately 30–35% annual travel.

Leads enterprise systems architecture, infrastructure modernization, automation, zero-trust implementation, and highly available hybrid-cloud operations. Oversees Infrastructure as Code, configuration management, cross-enclave interoperability, disaster recovery, compliance automation, governance, monitoring, and performance optimization across air-gapped and on-premises environments. Provides technical leadership for Windows, Linux, cloud, networking, containerization, identity, database, serverless, and microservices infrastructure, while guiding teams and enterprise-scale security initiatives.

Provisions, configures, and maintains highly available enterprise systems across cloud, hybrid-cloud, and on-premises environments. Drives Infrastructure as Code, configuration management, automation, monitoring, security, patching, disaster recovery, and performance optimization. Leads infrastructure improvement and standardization initiatives, resolves availability issues, strengthens cybersecurity posture, and mentors systems administration teams. Supports complex federal environments involving air-gapped enclaves, cloud platforms, containers, networking, identity services, databases, and DevSecOps pipelines.

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.