Top Systems Administrator Jobs

Manage and maintain IBM mainframe VTS tape and SAN infrastructure, DASD replication, and backup/DR environments. Configure storage, monitor performance and capacity, troubleshoot incidents, run DR testing, collaborate with vendors, and mentor junior staff to ensure high-availability and secure backup architecture.

Provide technical leadership and enterprise architecture for Microsoft 365, Entra ID, and Intune. Define governance, ITSM/ITIL practices, develop advanced automations (PowerShell/Bash), lead complex projects, mentor admins, and serve as escalation for security, reliability, and cross-team incidents.

The Contract Administrator will manage and coordinate contractual agreements, monitor project progress, analyze financials, and ensure timely invoicing while supporting project execution and collaboration across teams.

Support and maintain business applications like Jira and Costpoint, manage user tickets, ensure compliance, and document processes.

Senior Systems Administrator responsible for designing, administering, securing, and supporting enterprise infrastructure across Windows and Linux, virtualization, cloud, identity, storage, backup/DR, and endpoint platforms. Leads projects, mentors juniors, automates operations, partners with security and networking, and participates in on-call rotations to ensure reliable, secure infrastructure.

Administer and enhance NetSuite ERP (roles, workflows, SuiteScript, integrations, reporting) and support Windows-based IT systems, networking, endpoints, and vendor relationships to enable finance, supply chain, inventory, and sales operations.

Perform day-to-day Linux system administration for enterprise environments: deploy, configure, secure, patch, and upgrade RHEL servers and virtualized resources. Maintain VMs, integrate hardware/software, support networked devices, implement security compliance, document configurations, and decommission legacy systems to support a mission in Fort Meade, MD.

The Senior Systems Administrator ensures high availability of Linux systems, supports production operations, guides new technologies, and manages system documentation within ITIL standards.

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.

Lead and maintain secure Red Hat Enterprise Linux infrastructure for classified DoD programs. Provide technical leadership, mentor junior administrators, ensure compliance with security requirements, document processes, participate in change management, and support 24x7 operations with occasional after-hours work and limited domestic travel.

Provide North American technical support for networks, servers, and endpoints. Install, configure, and maintain hardware, cabling, firewalls, switches, VPNs, and enterprise applications (Epicor, Microsoft 365, Salesforce). Troubleshoot system, software, and network issues, train users, and collaborate with the MIS Manager to implement solutions and ensure security and performance.

Provide hands-on support and administration for end-user devices, servers (virtual/physical), network infrastructure, firewalls, and Office 365. Troubleshoot tickets, monitor performance, perform backups/recovery, assist with SQL and virtualization, and collaborate with IT and third-party teams on projects and incident response.

The Systems Operations Administrator I processes ID card applications, manages access control requests, conducts quality checks, and provides customer support and training.

Manage and optimize pre-sales systems and top-of-funnel tools (Chili Piper, Salesforce, LinkedIn Sales Navigator, Lusha, ZoomInfo). Own lead/account routing, user provisioning, workflows, data quality, integrations, and documentation. Partner with Sales, Marketing Ops, Finance, and Analytics to improve processes, troubleshoot issues, and apply automation/AI to scale pre-sales operations.

Provide IT support and systems administration: troubleshoot Windows/macOS, onboard/offboard staff, maintain conferencing and server systems, assist IT projects, and improve MDM/identity systems.

Provide second-tier Linux system administration for large-scale, multi-site deployments. Manage Red Hat systems, virtualization, storage (SAN, FC), clustered filesystems, security hardening, automated installs, scripting, backup, performance tuning, and support for developers and users.

Lead design, maintenance, and O&M of a secure Linux-based enclave: manage servers, VMs, switches, NAS, VLANs, VPNs; support developers; deploy and monitor nginx and security/monitoring tools; maintain documentation, compliance (RMF), patching, and monthly reporting.

Provide Tier 1/2 end-user IT support across multi-site manufacturing: deploy and manage devices, administer Microsoft 365 and Active Directory, handle onboarding/offboarding, troubleshoot network and printer/RF scanner issues, coordinate with MSP and vendors, and maintain IT documentation and baseline security practices.

Provide Linux workstation and server administration in physical and virtual environments: onboard users, image/configure workstations, troubleshoot systems and networks, monitor performance, plan upgrades/outages, install data center equipment, document infrastructure changes, and provide HelpDesk and occasional after-hours support.

Administer, configure, and support global collaboration and AI productivity platforms (Microsoft 365, Slack, Zoom, Power Platform). Build automation, enforce governance and security (DLP, eDiscovery), support meeting room technologies, provide escalation support, document standards, and partner with stakeholders to drive adoption and operational excellence.

The IT Systems Administrator ensures operational excellence in mission-critical IT settings, providing support for networking and IT infrastructure while collaborating with teams to resolve technical issues and maintain systems.

Provide hands-on Microsoft 365 and selected Azure administration, escalated helpdesk and production-support for office and manufacturing environments. Implement, secure, and improve cloud services (Entra ID/Azure AD, Exchange Online, Teams, Intune), and support networking, VMs, storage, monitoring, and backup in partnership with IT management.

Senior Linux systems administrator responsible for Ubuntu/Debian server and network administration, virtualization (VMware, AWS), automation (Puppet, Kickstart), monitoring (Nagios/Ganglia/Cacti), firewall/load balancer/LDAP configuration, scripting, building/migrating data center infrastructure on Dell hardware, troubleshooting, documentation, and project status reporting.

Manage and maintain corporate IT infrastructure including servers, storage, portal/web applications, and UNIX/Windows systems. Deploy, configure, patch, and troubleshoot systems, support cloud migrations and IaC, work with vendors and project teams, and ensure reliable, secure environments across departments.

Onsite Systems/LAN Administrator supporting ADOT network: troubleshoot network, software, and hardware issues; install/configure PCs and peripherals; administer Microsoft servers and AD; assist on projects; requires statewide travel and a valid Arizona Class D driver’s license.