Top Systems Administrator Jobs

Administer and monitor network, server, identity, endpoint, messaging, and cloud infrastructure. Responsibilities include Windows Server patching, troubleshooting, backups and recovery validation, UniFi administration, Active Directory account management, Intune endpoint administration, Exchange Online security, Azure monitoring, and escalated Tier 1–2 support. The role also uses AI tools to automate IT operations, optimize technology resources, and support staff adoption while delivering strong customer service.

Provide day-to-day end-user IT support and endpoint management across macOS, Windows, and Linux. Administer MDM and IAM/IDP systems, enforce security and HIPAA/PII compliance, manage SaaS apps and hardware inventory, perform L1/L2 network troubleshooting, and automate IT tasks via scripting. Maintain documentation and support a diverse user base in a fast-paced production environment.

Maintain and enhance Linux systems and infrastructure supporting NASIC at Wright-Patterson Air Force Base. Responsibilities include ensuring high availability, security, and system integrity; troubleshooting Linux environments; collaborating with stakeholders; and potentially supporting networks, hardware, backups, storage, scripting, Atlassian tools, and DevOps platforms.

Provides advanced systems and network administration for virtualized infrastructure, including troubleshooting Windows and Linux servers, managing business-critical applications, planning capacity, tuning performance, deploying configurations, remediating vulnerabilities, automating processes, coordinating vendors, and documenting technical procedures. Acts as a technical escalation point and supports highly available, secure services in collaboration with infrastructure, security, development, and business teams.

Administers Linux servers and Proxmox VE infrastructure, including clusters, virtual machines, containers, storage, backups, monitoring, security, and disaster recovery. Automates administration with scripting and configuration management, troubleshoots infrastructure issues, maintains documentation, supports critical incidents, and collaborates with IT teams in an onsite manufacturing environment. Participates in on-call coverage and planned maintenance.

Administers and configures enterprise Windows Server systems, monitors uptime and performance, troubleshoots incidents, and provides Tier II support. Manages VMware vSphere, server hardware, Web services, Active Directory, DNS, Exchange, updates, reboots, and backups. Performs root cause analysis, change management, documentation, user support, and staff training. Participates in an after-hours on-call rotation and provides local travel as needed.

Manage global Proxmox VE and Proxmox Backup Server environments, including architecture, deployment, maintenance, capacity planning, hardware lifecycle, VM provisioning, security, high availability, and disaster recovery. Collaborate with storage and networking teams, manage infrastructure projects, evaluate virtualization technologies, and mentor junior administrators. The role requires enterprise hypervisor, SAN, Linux, networking, and communication expertise, with optional experience in Ceph, scripting, Kubernetes, Podman, Dell hardware, and Windows Server.

Owns administration, configuration, optimization, security, workflows, reporting, and data governance for UKG and related HR systems. The role develops HR workflows, automates processes, maintains data integrity, supports workforce planning, manages upgrades and integrations, and partners with HR, IT, security, business leaders, and vendors. It also leads reporting, analytics, audits, troubleshooting, and system enhancements.

Administers and supports enterprise network infrastructure, Active Directory, Exchange, IAM, PAM, and related systems. Troubleshoots complex hardware and software issues, performs system maintenance and recovery, supports audits and governance reporting, coordinates technical projects, mentors administrators, monitors assigned work, and participates in on-call support. The role also maintains data center platforms, implements updates and hardening, and uses PowerShell for automation and reporting.

Own and improve PDQ’s go-to-market systems, with Salesforce as the core platform. Responsibilities include Salesforce architecture, configuration, automation, permissions, reporting, integrations, data synchronization, troubleshooting, technical debt reduction, documentation, testing, and change management. The role partners with Sales, Marketing, Customer Success, and RevOps to deliver systems initiatives independently and communicate risks, dependencies, and solutions clearly.

Administer and maintain Windows and Linux servers, enterprise infrastructure, virtualization, storage, backups, identity services, and cloud environments. Troubleshoot escalated systems issues, implement security baselines and compliance controls, remediate vulnerabilities, support audits and incident response, and maintain documentation. Collaborate with engineering and cybersecurity teams, support infrastructure projects, engage government customers, and identify automation and optimization opportunities in a secure classified environment.

Manage and support classified Red Hat Linux infrastructure onsite, including servers, storage, file systems, access, backups, software deployments, workstations, virtualization, and performance tuning. Troubleshoot complex hardware and operating system issues, implement security hardening, collaborate with cybersecurity teams, document technical solutions, and support disaster recovery. An active DoD Secret clearance and U.S. citizenship are required, along with DoD certification eligibility.

Provides advanced administration and support for Windows and Linux infrastructure across on-premises and cloud environments. Manages Active Directory, virtualization, storage, backups, patching, system performance, security controls, and compliance requirements. Delivers Tier II/III support, maintains documentation, supports infrastructure projects, and collaborates with engineering and cybersecurity teams. Interfaces with government clients in regulated, classified environments and evaluates automation and technology improvements.

Administers and monitors managed services infrastructure, including Windows servers, Microsoft 365, networks, security systems, virtualization, storage, backups, and MSP platforms. Troubleshoots escalated issues, performs root cause analysis, supports technical teams, improves alerting and automation, documents resolutions, analyzes network health, and participates in emergency on-call rotations.

Administer and troubleshoot secure Linux infrastructure across on-premises and cloud environments. Build CI/CD pipelines, automate administration with Ansible and Terraform, monitor system performance, implement security controls, document configurations and disaster recovery procedures, and collaborate with software and infrastructure teams supporting mission-critical operations.

Designs, deploys, and maintains Linux workstations and servers. Develops Puppet configuration management, creates Ubuntu imaging processes, resolves Tier 2 and Tier 3 technical issues, supports hardware and software developers, and assists with infrastructure automation using Terraform. The role also contributes to identity and access management, patching, system security, documentation, and scalable workstation and infrastructure operations.

Manage and monitor Linux-based IT infrastructure, servers, networks, and cloud environments. Build and maintain CI/CD pipelines, troubleshoot system issues, improve availability and performance, and collaborate with development teams on deployment strategies. Automate administrative tasks using scripting, Ansible, and Terraform. Maintain system documentation, implement security controls, and stay current with DevOps practices. The role requires extensive systems administration experience, a technical bachelor's degree or equivalent experience, and an active Top Secret/SCI clearance with favorable polygraph.

Administer and secure classified and unclassified TACLAN environments supporting USSOCOM. Manage Windows Server, RHEL, Active Directory, networking, PKI, virtualization, backups, patching, and lifecycle activities. Implement DISA STIGs, support RMF compliance, remediate vulnerabilities, monitor systems, troubleshoot incidents, document configurations, and provide Tier I/II support. The role requires participation in on-call and after-hours maintenance while supporting mission-critical systems in a high-tempo environment.

Administer and optimize cybersecurity infrastructure supporting a Cyber Operations Security Operations Center. Configure and maintain SIEM, EDR, network access control, and SOAR platforms; develop detection rules, integrations, automation workflows, and compliance procedures. Troubleshoot systems, perform updates and audits, support Linux and Splunk environments, assist users, document processes, provide training, and collaborate with cybersecurity, compliance, vendors, and leadership teams.

Administer Linux and VMware systems, assess end-user architectures, design infrastructure solutions, install and maintain operating systems, configure network components, and troubleshoot complex technical issues. Collaborate with network, storage, and server teams to develop solutions, support capacity requirements, maintain system integrity, and improve reliability and performance in a classified customer environment.

Administer and support AWS cloud infrastructure across development, test, and production environments. Build, configure, maintain, monitor, and troubleshoot Windows and Linux systems; manage storage, load balancing, databases, backups, file transfers, batch processes, user accounts, and security logs. Automate production processes, implement zero-downtime infrastructure changes, maintain NIST and intelligence-community compliance, and provide customer and on-call support.

Owns the operational health, compliance, security, lifecycle, and technical administration of Veeva Clinical and Regulatory platforms. Coordinates configuration, integrations, upgrades, access management, validated-system operations, audit readiness, incident response, vendor performance, budgets, and roadmap execution. Partners with global R&D, IT, security, quality, finance, procurement, legal, and business stakeholders while leading matrixed technical resources and supporting inspection-ready operations.

Provides Tier 2 helpdesk and systems administration support at Nellis AFB. Responsibilities include configuring and maintaining Windows workstations, imaging PCs, troubleshooting hardware and network connectivity, managing Active Directory objects, installing end-user hardware, and coordinating system upgrades and policy changes. Requires five years of related experience, technical training, U.S. citizenship, a valid driver’s license, and the ability to obtain and maintain a government security clearance.

Leads enterprise systems and network operations for USMEPCOM, managing infrastructure, cloud, virtualization, servers, networks, security configuration, patching, and change management. Directs 24/7 outage response, incident recovery, continuity and disaster recovery activities, vendor coordination, service-level performance, technical integration, documentation, and team readiness. The role requires active Secret clearance, ITIL certification, U.S. citizenship, and onsite support in North Chicago with assigned on-call coverage and occasional travel.

Administer Active Directory and enterprise IT systems, including security groups, folder structures, permissions, inheritance, and access controls. Diagnose and resolve technical issues, support operating systems, applications, storage, hardware, and network-related requirements, and collaborate with business teams and developers. The role is performed onsite in McLean, Virginia and requires an active TS/SCI clearance with polygraph.