Top Systems Administrator Jobs

Provide Microsoft 365 and core infrastructure administration for a regulated fintech environment: deploy SSO and automated provisioning, manage OneDrive/SharePoint migrations, UEM/MDM, IAM/RBAC, scripting automation, patching and vulnerability assessment, incident escalation for SEV1/SEV2, and maintain compliance-aligned documentation and KPIs.

Lead design, implementation, hardening, and support of hybrid cloud and on-premises infrastructure (primarily Azure). Serve as escalation point for complex incidents, enforce IAM and Zero Trust, automate via IaC and scripting, manage virtualization, backups, DR, security posture and compliance (SOC 2, PCI-DSS, SOX), and mentor junior staff.

Support and modernize a cloud-first IT environment, administering Microsoft 365/Entra ID and Intune, managing LAN/WAN/WLAN and firewalls, leading infrastructure migrations and security/governance efforts, and providing office technology support across multiple locations.

Support and administer mission-critical Army IT systems: install, configure, and maintain workstations, file and web servers, security tools (firewalls, anti-virus, IDS), monitor performance and compliance, develop documentation and web pages, train users, enforce IT policies and Cyber WorkForce directives, and support DoD standards across multi-year programs.

Administer and support UNIX/Linux/Solaris servers in production data centers; manage Chef configuration automation; operate VMware Enterprise virtualization; collaborate with teams; support middleware (Apache, Tomcat), databases (Oracle), storage (SAN/NAS) and disaster recovery as needed.

Administer and support enterprise Citrix environments (XenApp/XenServer/NetScaler), handle incidents and change management, perform VM, DHCP, AD, Group Policy and storage administration, ensure networking/security standards, and meet SLAs.

Provide senior-level administration, troubleshooting, and leadership for Windows-based production environments. Responsibilities include monitoring, incident and change management, patching, virtualization management, security and vulnerability protection, asset management, and mentoring junior staff to meet SLAs and engineering governance.

Provide technical leadership and Level 3 24x7 support for complex UNIX/Linux environments. Design HA and secure server/storage infrastructure, perform capacity planning, manage HP-UX/Solaris/AIX/RHEL systems, SAN/NAS and backup/recovery, implement DR and virtualization, handle incident troubleshooting with vendors, maintain monitoring, change/configuration control, and update system documentation.

Provide technical expertise for planning, implementing, maintaining, and troubleshooting UNIX and Windows systems, networks, mail servers, and user IT issues. Deliver help desk support, perform system maintenance, configure networks, document incidents, evaluate hardware, and create training materials.

Provide systems administration support including managing and monitoring servers, storage, network and mobile devices; Tier 1/2 troubleshooting; configure Linux/RHEL and Windows; perform patches, backups, account/security administration; support upgrades, testing, reporting, and user support.

Administer and operate a self-hosted ServiceNow (Zurich) platform on AWS, managing RHEL9 and Windows servers, EC2, RDS, ALBs, and security groups. Perform upgrades, incident response, and platform modernization. Deploy and integrate ServiceNow AI features with AWS Bedrock/LLM backends, support MCP configuration, and collaborate on integrations and POCs.

Own and scale internal IT and corporate systems, providing end-user support, identity/device management, onboarding/offboarding automation, office and remote network/VPN infrastructure maintenance, vendor/contractor coordination, and administration of internal AI and SaaS tools to improve employee productivity.

Provide desktop and server support across multiple sites: install, maintain and troubleshoot PCs, servers, printers, network and voice/data services; manage user accounts and directory/email services; perform backups/restores; document systems and train users; escalate outages and provide on-call and occasional travel support while collaborating with regional IT staff.

The Senior Systems Administrator is responsible for managing on-premises and cloud systems, focusing on security, identity, server administration, backup, and SaaS applications while coordinating with external vendors and performing updates as needed.

The Network/Systems Administrator will maintain data security, track network requests, provide communication to customers, log contacts, and report activities.

The Systems Administrator will monitor system performance metrics, support system administration tasks, and manage FICO Debt Manager integration with other systems.

The Systems Administrator manages mission-critical IT infrastructure, providing support, troubleshooting, and maintenance for Windows and UNIX systems.

The Windows Systems Administrator will manage Windows Server operations, Active Directory, patch automation, and VMware systems, while leading a team and ensuring effective communication.

Administer and support large-scale Linux infrastructure across physical and virtualized environments. Responsibilities include server configuration, monitoring, troubleshooting, patching, upgrades, application and Oracle database migrations, shell-script automation, performance tuning, capacity planning, backup and storage support, disaster recovery, root cause analysis, and collaboration with infrastructure and application teams.

Administer and improve Crest Operations’ hybrid IT environment across Windows Server, Active Directory, Microsoft 365, Azure, VMware, and endpoint platforms. Responsibilities include identity and access management, endpoint configuration, patching, migrations, backups, recovery testing, monitoring, root-cause troubleshooting, automation with PowerShell and APIs, documentation, ITIL-based ticket and change management, and proactive risk identification.

Administer, maintain, monitor, and troubleshoot Linux servers. Deploy and migrate systems on AWS, architect cloud solutions, test new configurations, manage Apache or NGINX environments, troubleshoot networking issues, and implement load-balancing and monitoring solutions. Preferred experience includes orchestration tools, Jenkins, scripting languages, and RHCE certification.

The UNIX/Linux Systems Administrator is responsible for installing, configuring, and maintaining Linux systems, ensuring data integrity, and managing software solutions, among other responsibilities in a Systems Administration team.

The GIS Administrator will manage GIS systems, provide support for ESRI software, perform server administration, and troubleshoot outages. Responsibilities include application deployment, system upgrades, and documentation preparation.

Administer and improve CAD, PDM/PLM, and engineering data systems (Creo, Windchill, DDM). Manage licenses, vendor contracts, system configurations, data integrity, ERP integrations, user support, training, and compliance with standards and export controls.

Maintain, configure, and administer enterprise databases (Epic IRIS/Caché). Troubleshoot database issues and performance bottlenecks, monitor environments, develop/implement integrity and security policies, and handle service-desk tickets and scheduling.