Top Systems Administrator Jobs

Administers and monitors cybersecurity systems, including firewalls, IDS/IPS, endpoint protection, and security monitoring tools. Detects and responds to incidents, conducts vulnerability assessments and penetration testing, enforces security policies, supports secure system deployments, maintains regulatory compliance, trains staff, and documents incidents and recommendations.

Provide senior system administration, network operations, configuration management, and cybersecurity leadership for NASA Wallops Range IT systems. Administer Windows and Linux environments, enterprise networks, NASCOM, specialized data systems, and mobile range infrastructure. Implement FISMA, RMF, STIG, continuous monitoring, and ATO processes. Support launch operations, troubleshoot mission-critical systems under time pressure, deploy to remote sites, maintain security documentation, and mentor junior staff.

Coordinates and supports the plant’s OT environment, including Foxboro control systems and supporting infrastructure. Manages routine administration, backups, patching, monitoring, documentation, vendors, and project tasks while partnering with controls engineers and specialists on complex work. Supports system upgrades, expansions, procurement, troubleshooting, network segmentation, access control, and reliability in a 24/7 manufacturing environment.

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.

Owns the Microsoft security stack, monitors and investigates security alerts, maintains identity, endpoint, and M365 security controls, and leads PCI compliance activities. The role also administers accounts and permissions, deploys workstations, provides technical support, develops security training, and leads technology and security projects. It requires strong cybersecurity knowledge, communication, organization, judgment, and initiative in an office-based environment with limited travel.

Administers distributed server, storage, endpoint, and network infrastructure across a large geographic footprint. Responsibilities include network installation, configuration, security, backups, performance tuning, troubleshooting, hardware and software provisioning, vendor coordination, technical support, project tracking, remote-site administration, and after-hours emergency availability. The role requires travel to remote sites or training up to 50% and focuses heavily on networking technologies including firewalls, routers, switches, VPNs, MPLS, and load balancers.

Supports a mission-critical enterprise by provisioning, configuring, and maintaining highly available systems. Uses Infrastructure as Code, configuration management, and automation tools to streamline system administration, improve operational efficiency, and secure infrastructure management. Develops procedures for restoring computer systems and updating their functionality. Requires an active Top Secret clearance and willingness to obtain a polygraph.

Administers Microsoft 365, Entra ID, Exchange Online, Teams, SharePoint, Intune, endpoints, identity services, Azure environments, and SaaS platforms. Provides Tier 2 support, manages onboarding and offboarding, implements security and governance controls, supports application integrations, develops PowerShell automation, maintains documentation and monitoring, and assists with practice onboarding, acquisitions, vendors, and technology transitions. Participates in change control, scheduled maintenance, and on-call support.

Own strategy, architecture, configuration, integrations, and optimization for G&A and Finance business systems. Serve as product owner by defining roadmaps, prioritizing features, managing system lifecycles, evaluating solutions, and delivering AI use cases. Partner with business leaders, improve processes, document system flows, establish configuration standards, and drive adoption, reliability, and compliance across the enterprise systems environment.

Client-facing systems administrator who designs, implements, and maintains infrastructure. Responsibilities include server, networking, virtualization, endpoint protection, and project execution, plus client consulting, relationship management, and ongoing professional development.

As a Systems Administrator, you will consult clients on IT needs, manage infrastructure projects, support various systems, and maintain client relationships.

Consult with clients to assess IT needs, design and maintain technology solutions, manage relationships, and resolve technical issues while building expertise through training.

Provides senior-level systems administration and IT operations support for a Department of State contract. Responsibilities include desktop, infrastructure, application, web services, and network support; incident, problem, and change management; root cause analysis; application deployment; and ticket ownership. The role leads technical initiatives, supervises and mentors systems administrators, supports geographically distributed users, and maintains reliable enterprise IT services. Active Secret clearance and extensive IT service management experience are required.

Installs, configures, integrates, tests, secures, and troubleshoots Windows-based applications. Sustains AWS GovCloud services, resolves software issues, implements DISA STIGs, and supports application owners, developers, and internal teams through ticketing systems. The role requires on-site support in Patuxent River approximately three days weekly and occasional evening or weekend maintenance work.

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.

Administers and supports enterprise PKI infrastructure across Windows, Red Hat Linux, and Cisco platforms. Manages certificate authorities, templates, issuance, renewal, revocation, OCSP, CRLs, HSMs, smart cards, NDES, and third-party integrations. Troubleshoots Tier 2 and Tier 3 incidents, automates monitoring with PowerShell, maintains documentation, and ensures compliance with DoD STIG and zero-trust requirements. Supports a globally distributed environment of more than 85,000 users, including shift work, on-call rotations, and weekend maintenance.

Administer enterprise Cisco Unified Communications Manager and related telephony systems, including maintenance, upgrades, documentation, dial plans, traffic routing, performance monitoring, SLA support, and break/fix resolution. Support TDM and VoIP platforms in large-scale, multi-cluster environments while applying security and compliance practices. The role is fully onsite in Columbia, Maryland, and requires TS/SCI with polygraph clearance.

The Senior Systems Administrator installs, configures, maintains, and optimizes Windows and Linux systems, network software, application environments, and databases. Responsibilities include application networking, load balancing, vulnerability management, security patching, monitoring, performance tuning, automation, environment management, SSRS support, backups, troubleshooting, documentation, and deployment planning. The role supports multiple operational locations and requires collaboration with technical, security, development, database, and customer teams within DoD environments.

Provides onsite systems administration for aircraft and weapons systems networks at a government hosting facility. Responsibilities include deploying and maintaining physical and virtual infrastructure, managing servers, workstations, applications, backups, user accounts, permissions, networking, and disaster recovery. The role also requires troubleshooting, documentation, customer support, security monitoring, DoD compliance, and Agile project participation. A Top Secret clearance, Security+ or equivalent certification, operating system certification, and at least three years of relevant experience are required.

Administer and support enterprise Microsoft 365 and Google Workspace platforms, including messaging, collaboration, identity, security, compliance, retention, and data governance services. Investigate complex incidents, implement platform changes and migrations, develop PowerShell and Microsoft Graph automation, monitor service health, and maintain documentation, procedures, and runbooks. The role partners with university departments and technical teams to deliver reliable, secure, and supportable productivity solutions.

Provide day-to-day administration and technical support for Linux/Windows systems, virtualization (VMware), storage (NAS/SAN), backups, patching, and hardware/software installs. Configure servers, workstations, and network components; perform capacity planning, tuning, testing, documentation, and troubleshooting in a secure federal environment requiring TS/SCI with polygraph.

Administer and troubleshoot client desktop, server, networking, virtualization, Microsoft 365, Azure, security, backup, and cloud environments. Resolve escalated infrastructure issues, manage tickets according to SLAs, support customers remotely and onsite, and participate in on-call rotations. Mentor Systems Technicians, provide technical guidance, create documentation and SOPs, improve processes, and promote effective use of AI-enabled administration tools.

Plan, build, administer, secure, and maintain SAP information systems using Linux, Windows, virtualization, VDI, Splunk, networking, and encryption technologies. Maintain system documentation, authority to operate, configuration management, and change control. Support data transfers, COMSEC keying material, Type 1 encryption devices, and coordination with IT teams and management. The role is fully on-site in Patuxent River, Maryland and requires a Final DoD Top Secret clearance.

Owns configuration, governance, optimization, and integration of SAP ByDesign and Salesforce. The role standardizes cross-functional business processes, maintains master data, troubleshoots issues, develops dashboards and KPIs, documents workflows, trains users, and leads system enhancements. It also supports mergers and acquisitions through data migration, process harmonization, and post-acquisition ERP alignment.

Provides SOCRATES system administration, desktop support, networking, troubleshooting, hardware and software configuration, network integration, and help desk support for USSOCOM and DoD users. Responsibilities include Windows 11 migrations, workstation replacements, communications migrations, LAN installation, system maintenance, and CONUS/OCONUS technical support. The role may require contingency deployments, extended shifts, and frequent travel to DoD installations.