Top Systems Administrator Jobs

Manage and monitor enterprise PKI systems, administer digital certificates (issuance, renewal, revocation), troubleshoot PKI issues, maintain CAs/RAs and HSMs, enforce PKI policies and best practices, conduct audits, document configurations and workflows, and automate tasks via scripting.

Provides systems administration support for Windows and Linux environments, including configuration, patching, monitoring, troubleshooting, virtualization operations, baseline maintenance, account management, and documentation. Supports Nutanix virtual machines, cybersecurity patch directives, test environments, directory services, configuration control, and sustainment processes while escalating complex issues to senior engineers.

Provides systems administration support for Windows and Linux environments, virtualization operations, configuration baselines, patch validation, account and directory services management, troubleshooting, and documentation. Supports Nutanix virtual machines, test environments, configuration control, and compliance with IAVA, TCNO, and NOTAM cybersecurity directives. Escalates complex issues to senior engineers while maintaining system availability, integrity, and sustainment documentation.

Lead systems administrator and Information Systems Security Officer (ISSO) for classified intelligence networks. Provide full lifecycle risk management, enforce security policies, drive vulnerability remediation, support assessment and authorization (RMF), integrate MI systems across classified domains, and deliver rapid cyberspace threat analysis and technical responses to keep systems authorized and mission-ready.

Maintains and operates virtualized data center infrastructure, servers, storage, Active Directory, Group Policy, DNS, and VMware environments. Responsibilities include performance tuning, patching, antivirus oversight, backups, system health checks, troubleshooting outages, implementing updates, documentation, configuration management, and supporting security initiatives. Provides technical mentorship to Tier 1 and Tier 2 personnel while supporting mission-critical systems at Langley AFB.

Administer and support ERP systems and connected business applications, including configuration, user access, integrations, monitoring, reporting, data management, and troubleshooting. Partner with finance and IT to translate business workflows into system improvements, support month-end and audit needs, document processes, and coordinate ERP upgrades, automation, vendors, and integrations across a multi-entity organization.

Manage enterprise Windows infrastructure, including Windows Server, Active Directory, VMware virtualization, automation, high-availability systems, storage, monitoring, networking, and security compliance. Apply DISA STIGs, support vulnerability remediation, perform system upgrades and migrations, troubleshoot complex infrastructure issues, and maintain production environments. The role also provides technical leadership and mentorship while supporting a U.S. Army government contract.

Supports systems administration for computer systems, operating systems, servers, appliances, and specialized applications. Duties include installation, troubleshooting, maintenance, configuration changes, upgrades, vulnerability remediation, networking, end-user support, documentation, and technical writing. The role is intended for undergraduate students and requires U.S. citizenship, background checks, and eligibility to obtain a government security clearance.

Owns identity, access, device, SaaS, automation, and IT systems for a remote organization. Responsibilities include Okta administration, macOS and Windows MDM, employee lifecycle workflows, ticketing, Zoom and Zoom Phone, AI governance, SaaS discovery, 1Password, security controls, documentation, dashboards, and SOC 2 evidence. The role combines hands-on IT support with systems architecture, integrations, automation, and security-minded operational ownership.

Administer and support cloud, identity, server, network, firewall, telephony, and end-user environments. Resolve escalated technical issues, automate repetitive processes through scripting, document configurations, monitor performance, maintain security standards, coordinate with vendors, and lead system implementations across agency locations.

Maintain and support IT infrastructure, including Microsoft 365 administration, Okta identity and access management, end-user support, hardware, cloud services, endpoint security, backups, and asset inventory. Provide basic Meraki and Cisco networking support, assist with application deployments and disaster recovery, document systems and processes, coordinate with vendors, and contribute to IT security, compliance, and operational projects.

Administer and maintain DoD enterprise IT systems, networks, servers, workstations, applications, and communications infrastructure in a classified environment. Responsibilities include system configuration, troubleshooting, account administration, patching, backups, security hardening, vulnerability remediation, monitoring, documentation, incident response, and technical support for military and government users. The role coordinates with cybersecurity and infrastructure teams and supports mission-critical US PACOM operations, including after-hours and exercise support.

Administer and secure on-premises and cloud servers, networks, hybrid identity, Microsoft 365, backups, telecom, endpoints, and mobile devices. Support security operations, incident response, SOC 2 evidence collection, documentation, and disaster recovery. Own infrastructure projects from planning through deployment, troubleshoot escalated issues, and participate in after-hours callbacks for critical 24/7 emergency communications systems.

Provides hands-on Level 1 IT support, troubleshoots Windows devices, Microsoft 365, connectivity, printers, and software, and manages hardware deployment, user onboarding/offboarding, asset records, licensing, and documentation. Supports Unanet AE administration and reporting using SQL or scripting, identifies cybersecurity concerns, and coordinates escalated issues and projects with an external MSP. The hybrid role may require occasional travel and physical handling of computer equipment.

Administer and support Autodesk, Bentley, and Esri engineering applications across virtual and physical workstations. Build application packages and deployment automation, manage software licensing, test updates, resolve complex application issues, coordinate vendor support, monitor application performance, document procedures, and mentor junior staff. The role includes evening and weekend maintenance windows, IT on-call participation, and travel to regional offices.

Administer and secure RHEL/Linux infrastructure across development, test, and production environments. Responsibilities include troubleshooting, patching, account and permission management, automation with Ansible, Bash, and Python, vulnerability remediation, security hardening, AWS operations, monitoring, documentation, change management, and rotational on-call support. The role requires collaboration across technical teams and an active TS/SCI clearance with polygraph.

Oversee JWICS operations across Wing and subordinate SCIFs, maintaining servers, computers, software, accounts, domains, file servers, permissions, backups, patches, and security controls. Support users and resolve network issues, investigate malware and unauthorized software, perform system maintenance, assist with SCI security functions, and prepare technical and administrative documentation. The role requires autonomous work, collaboration with government agencies, and on-call support outside normal hours.

Administer and secure RHEL/Linux infrastructure across development, test, and production environments. Responsibilities include system configuration, patching, monitoring, troubleshooting, automation, vulnerability remediation, security hardening, lifecycle management, documentation, and on-call support. The role uses Ansible, Bash, Python, and AWS services including EC2, ECS, EKS, Systems Manager, and CloudFormation while supporting mission-critical systems in a classified environment.

Administers and supports Azure customer enclaves for intelligence community environments. Responsibilities include architecture, technical leadership, system health monitoring, troubleshooting, incident escalation, patching, vulnerability remediation, configuration management, Azure solution deployment, Active Directory and Windows support, AVD administration, and operational maintenance. The role requires collaboration with Microsoft, customers, system owners, and migration teams while supporting C4 operational environments.

Own CloudFit’s people technology ecosystem, serving as the primary Workday administrator and supporting payroll continuity. Responsibilities include HRIS configuration, workflow design, integrations, reporting, data governance, employee lifecycle transactions, process automation, documentation, controls, and troubleshooting. The role partners with People Operations, Finance, Technology, and Compliance to improve scalable and compliant people processes, maintain payroll backup readiness, and deliver workforce dashboards and operational insights.

Provides senior Linux systems administration for mission-critical DoD supercomputing environments. Responsibilities include leading a local administration team, managing Red Hat and UNIX systems, tuning performance, installing and upgrading software, monitoring production systems, conducting acceptance testing, implementing STIG remediations, supporting security personnel, and maintaining compliance with operational standards.

Administer and support Hastings College’s IT infrastructure, including Windows Server, Hyper-V virtualization, Active Directory, networks, security systems, backups, and disaster recovery. Provide technical assistance, troubleshoot hardware and software issues, maintain documentation, support business continuity, collaborate with campus departments, and contribute to technology planning and service improvements.

Installs, configures, maintains, secures, and upgrades RHEL and Windows systems across physical, virtual, and cloud environments. Applies patches, conducts cybersecurity compliance scans, manages system performance, and supports RMF compliance. Develops documentation, troubleshooting guides, and configuration procedures; communicates technical risks and solutions to clients; analyzes network metrics; and helps modernize mission-critical infrastructure. The role also provides technical leadership and requires collaboration across systems administration, cybersecurity, virtualization, containerization, and cloud environments.

Provides tier-2 support and administration for ERP, CRM, financial, and operational systems. Responsibilities include troubleshooting user issues, maintaining data integrity, running SQL queries, monitoring integrations, supporting upgrades and testing, administering user access, documenting procedures, training employees, and coordinating with internal teams and vendors.

Administers and troubleshoots company hardware, software, networks, Wi-Fi, IP telephony, Active Directory, Office 365, Teams, and OneDrive. Installs, configures, upgrades, and repairs systems; manages employee accounts and equipment; evaluates new technology; supports workstation moves; and assists the IT Director with procedures and special projects.