Top Systems Administrator Jobs

Maintain and monitor computing and network environments supporting U.S. Navy submarine logistics. Responsibilities include installing upgrades, troubleshooting network, system, and application interface issues, responding to help desk calls, evaluating network performance, managing connections and firewalls, and following established network administration policies. The role also supports other department operations and may require limited travel to off-site locations.

Manage classified, air-gapped Windows and Linux systems in closed-area lab environments. Responsibilities include Active Directory, GPO, domain controller, VMware, Veeam, Trellix ePO, Nessus, Splunk, vulnerability remediation, data spill response, secure sanitization, STIG and RMF compliance, documentation, and audit readiness. The role is fully onsite, supports classified mission environments, and requires occasional after-hours or weekend maintenance and incident response.

Installs, configures, operates, secures, and maintains Windows systems, servers, desktops, networks, hardware, software, and VMware environments supporting classified aerospace programs. Provides systems and application support, restores computing services, tracks inventory, supports security audits, remediates vulnerabilities, and protects classified information in closed environments.

Installs, configures, secures, operates, and maintains Windows-based servers, desktops, networks, hardware, software, and VMware environments supporting classified aerospace programs. Provides systems and application support, inventory tracking, service restoration, security audit assistance, vulnerability remediation, and closed-environment computing support. Requires active Secret clearance, U.S. person status, Security+ certification, and at least three years of relevant systems administration experience.

Configure, install, maintain, and troubleshoot Windows VDI on Nutanix and VMware infrastructure. Administer Windows desktops, servers, Active Directory, networking, authentication, virtualization, and Microsoft System Center environments. Support integration with Linux servers, printers, and DoD CAC authentication. Provide daily user support and collaborate with technical teams, management, and vendors while maintaining DoD and Army security configurations.

Administer classified Linux and Windows environments, including storage, networking, firewalls, Active Directory, Group Policy, virtualization, monitoring, automation, maintenance, patching, and troubleshooting. Develop SOPs, support production and development systems, follow DoD security guidelines, and provide after-hours maintenance support. The role requires an active Top Secret/SCI with polygraph clearance and on-site work in Arlington, Virginia.

Manage and maintain Windows and Linux systems, servers, networks, applications, infrastructure, permissions, and system performance. Configure operating systems and management tools, troubleshoot technical issues, implement automation and scripting, perform security monitoring, maintain documentation, and ensure compliance with organizational standards. The role also oversees inventory, supports project execution, communicates with stakeholders, evaluates emerging technologies, and mentors junior team members.

Senior systems administrator responsible for secure, classified IT environments: configure and maintain Lab-in-a-Box, VMware, backups, endpoint protection, vulnerability scanning, Active Directory/GPOs, Splunk logging, and ensure STIG/RMF/NISPOM compliance. Lead data spill response, system sanitization, documentation, and audit readiness while collaborating with security stakeholders in a 100% onsite classified area.

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 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.

Provides enterprise end-user IT support, endpoint administration, infrastructure maintenance, and asset lifecycle management. Supports Windows, macOS, and Linux systems; hardware, software, mobile devices, conference-room technology, user accounts, permissions, endpoint security, and IT assets. Maintains documentation, licensing records, and service tickets while resolving incidents and collaborating with infrastructure, network, and security teams. The role includes executive and board-facing support, occasional after-hours work, and requires strong troubleshooting, communication, and organizational skills.

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.

Administer SecureView Management Server and cross-domain endpoints; configure networks, storage, virtualization, operating systems, databases, and security systems. Create OS images, support VDI environments, perform maintenance and upgrades, troubleshoot issues, and assist with disaster recovery. Provide customer and site support, install and test approved hardware and software changes, maintain system data, support exercises and contingencies, document problems and change requests, and train site personnel.

Provides enterprise IT support and junior systems administration across Windows, macOS, and Linux environments. Supports executive users, conference room technology, user accounts, endpoint security, asset lifecycle management, software licensing, incidents, documentation, and maintenance activities. Collaborates with infrastructure, network, and security teams while delivering customer-focused support across multiple locations.

Own Salesforce administration for Sales, Marketing, and Customer Success, including configuration, declarative automation, data quality, user support, permissions, and provisioning. Administer adjacent GTM tools such as Gong and Apollo.io, support territory, quota, and forecasting changes, and manage sandbox testing, deployments, release documentation, and user communications.

Administer and maintain VMware, Windows, Linux, and VDI environments; manage Active Directory, DNS, GPOs, Exchange, patching, vulnerability remediation, IAVAs, security scans, and enterprise monitoring. Provide advanced technical support, implement infrastructure enhancements, document security compliance activities, and collaborate across workgroups within an Agile SAFe environment. The role also involves PowerShell automation, system hardening, virtual cluster management, and sustaining secure, scalable infrastructure.

Administers network and server infrastructure at a manufacturing facility, including Cisco switches, wireless networks, Windows Server, Active Directory, DNS, DHCP, firewalls, VPNs, backups, and enterprise applications. Troubleshoots infrastructure and end-user issues, maintains documentation, supports upgrades and vendors, assists with security and disaster recovery activities, and provides occasional on-call support.

Administer and optimize geographically distributed Linux and Microsoft server environments, including air-gapped enclaves. Responsibilities include system configuration, vulnerability assessment, patching, certificate renewal, Active Directory administration, security hardening, backup and restoration, troubleshooting, documentation, and stakeholder coordination. The role requires supporting technical teams, maintaining infrastructure reliability, and providing recommendations to management in high-assurance defense environments.

Administers and optimizes Infor Lawson ERP environments supporting HR and payroll. Responsibilities include application and middleware server management, upgrades, patching, performance monitoring, backups, disaster recovery, access controls, LDAP and SSO integration, SQL-based data management, environment synchronization, Tier 2/3 support, documentation, and coordination with DBAs, functional leads, IAM teams, and Infor support.

Maintains multi-site physical and virtual server infrastructure, Windows and Linux systems, identity platforms, Microsoft 365, virtualization, backups, DNS, DHCP, and file services. Oversees monitoring, patching, vulnerability remediation, troubleshooting, documentation, system hardening, and infrastructure changes. Serves as the Level 2 escalation point, supports upgrades and deployments, coordinates vendors, and enables reliable IT operations within a manufacturing and engineering environment.

Administer and support distributed enterprise infrastructure across Azure, AWS, GCP, and on-premises environments. Maintain Windows and Linux systems, Active Directory, VMware, networking, storage, security access controls, backups, and disaster recovery capabilities. Monitor and optimize performance, troubleshoot complex production issues, manage incidents and service tickets, and support high availability and business continuity. Collaborate with infrastructure, engineering, and business teams to maintain reliable, secure, and compliant systems.

Manage server operations, operating systems, databases, software, hardware, networks, backups, and file recovery. Monitor and troubleshoot infrastructure, perform system testing, optimize resource utilization, conduct capacity planning, and support users with IT needs. The role requires expertise in at least one operating system, including configuration, patch management, and upgrades, along with an active TS/SCI clearance with polygraph.

Supports and administers Oracle EPM Cloud, Hyperion, and other FP&A applications, databases, reports, and integrations. Maintains system performance, data integrity, security, and availability; troubleshoots issues and supports users. Develops requirements, data mappings, documentation, test cases, and upgrade implementations. Partners with finance, technology teams, vendors, and stakeholders on projects involving planning, forecasting, reporting, cost allocation, automation, and innovative enterprise application technologies.

Administers and supports Salesforce and other business systems, managing users, permissions, reporting, dashboards, data loads, testing, issue resolution, process improvements, automation, and system feature adoption. Partners with business and technical stakeholders to design scalable solutions and provide analytics that inform decisions. This is a temporary, full-time remote U.S. position expected to last approximately six months.

Administers Windows and UNIX/Linux systems across classified and unclassified DoD environments. Provides Tier 1 and Tier 2 support, manages accounts, networks, operating systems, Microsoft 365, Exchange, SharePoint, backups, and endpoint security. Implements STIGs, Group Policies, patching, vulnerability remediation, RMF controls, POA&Ms, and ATO activities. Troubleshoots infrastructure issues, supports system authorization and readiness, maintains security documentation, trains users, and may lead technical projects or on-call operations.