Top Systems Administrator Jobs

Provision, install, configure, monitor, maintain, and troubleshoot Windows/Linux servers and related infrastructure. Perform patching, backups, performance tuning, capacity planning, recoveries, and application deployments. Use PRTG for monitoring, handle escalations, maintain procedures, participate in on-call pager rotation, and support occasional travel.

Administer, secure, and maintain Windows and Linux systems in physical, virtual, and air-gapped classified environments. Perform Tier 2 incident resolution, patching, vulnerability remediation, system hardening (DISA STIGs, SCAP, NIST 800-53), automation (PowerShell, Bash, Ansible), imaging/OS deployment, AD/DNS/DHCP administration, Layer 2 networking, backups, monitoring, and on-call support to ensure availability and compliance.

Support and administer loan origination systems, ensure data integrity and regulatory compliance, respond to customer inquiries, manage system releases and testing, lead acquisitions and bank-wide projects, develop training and documentation, and back up department management.

Lead administration and enhancement of complex systems for mission-critical aerospace and defense environments. Manage system performance, security, upgrades, testing, documentation, data handling, and provide expert troubleshooting while coordinating with IT teams and supporting deployed operations.

Senior Systems Administrator responsible for patching, hardening, troubleshooting, and maintaining Windows and Linux servers across on-prem and cloud. Manage IAVA patching/reporting, implement GPOs and PowerShell automation, and use AWS (EC2, Lambda, CloudFormation) plus IaC tools (Ansible, Terraform) to provision and automate infrastructure. Support lifecycle sustainment and modernization for government training applications.

The Senior Systems Administrator & Database Engineer manages mission-critical systems, ensuring secure operations and compliance across Windows and Linux environments, administers Microsoft SQL Server databases, and supports cloud integration and system modernization. Responsibilities include system hardening, troubleshooting, and collaboration with Cybersecurity and other teams.

Provide systems administration support for mission-focused IT environments. Maintain and administer servers, networks, and secure infrastructure; ensure compliance with security policies and support customer operations. Requires active TS/SCI with polygraph.

Own administration, optimization, and scalability of Salesforce and GTM systems supporting Sales, Marketing, Customer Success, and Revenue Operations. Design and implement declarative automations, manage security and integrations (Okta, SSO), support complex revenue processes, participate in M&A system integrations, and drive user adoption and operational efficiency.

Administer and maintain core insurance enterprise systems, manage change requests and vendor SLAs, support UAT and incident resolution, ensure data privacy compliance, and maintain operational and security documentation.

The Systems Administrator provides Tier 1-3 support, manages Linux/UNIX systems, ensures data integrity, and oversees system upgrades and backups.

The Systems Administrator will support Military Support Programs by managing Linux and Windows systems, focusing on AWS integration and hardware infrastructure.

Seeking a Senior Systems Administrator with expertise in RHEL, AWS, and server maintenance. Must support complex OS troubleshooting and handle backup systems. Requires active TS/SCI clearance.

The Systems Administrator will manage Linux and Windows servers, perform installations and configurations, and provide support for large-scale software development and operations.

The Senior Systems Administrator supports mission-critical projects focusing on security and intelligence, overseeing product testing, access management, monitoring, and troubleshooting within AWS environments.

Provide and maintain secure Windows and Red Hat Enterprise Linux systems for classified DoD programs, troubleshoot complex integration issues, collaborate with cybersecurity, document processes, train staff, and meet DoD certification requirements. Support 24x7 operations and occasional domestic travel.

Provide advanced desktop, server, and network infrastructure support for managed services clients. Act as first escalation for technicians, deliver onsite and remote troubleshooting, document configurations and procedures, and recommend system improvements to enhance efficiency.

Lead administration and optimization of enterprise IT infrastructure, focusing on VMware vSphere, Windows Server, Microsoft 365, SQL Server, backup/disaster recovery, security hardening, patch management, endpoint protection, logging/monitoring, and high-availability fault-tolerant designs. Provide troubleshooting, documentation, stakeholder support, and occasional after-hours maintenance in a primarily onsite, mission-critical environment.

Install, configure, maintain, and tune purchased applications and frameworks. Participate in upgrades, releases, testing, and problem diagnosis. Work with infrastructure teams, vendors, and developers to troubleshoot, document system configurations, and ensure application performance and change management compliance.

As a Sr. Systems Administrator, you will maintain servers, manage software platforms, liaise between teams, and support engineering operations, providing solutions and keeping systems operational.

The Level 3 Systems Administrator supports IT systems and infrastructure by managing operations, troubleshooting issues, and ensuring system reliability, performance, and security across enterprise environments.

The Systems Administrator supports IT systems troubleshooting, manages system infrastructure, and resolves issues for various devices; requires configuration and management experience for UNIX and Windows systems.

The Systems Administrator will support IT systems implementation, troubleshooting, maintenance, and daily operations, optimizing performance and reliability across various environments.

Administer and secure global IT infrastructure including AD, M365, VMware, Nutanix, AWS; provide 2nd/3rd level support, lead patching/migrations, monitor systems, coordinate vendors, and maintain documentation to meet SLAs.

The role involves managing and optimizing cloud infrastructure services as a Linux Systems Administrator, focusing on systems performance and troubleshooting.

The Mainframe Systems Administrator monitors and tests software programs, maintains system documentation, resolves failures, and modifies software to improve performance.